DTC SUZUKI SX4 2006 1.G Service Owner's Manual

Downloaded from www.Manualslib.com manuals search engine 1A-32 Engine General Information and Diagnosis:
DTC TableS6RW0D1104005
NOTE
• There are two types of OBD system depending on the vehicle specification.
For identification, refer to “Precaution on On-Board Diagnostic (OBD) System”.
• For non-Euro-OBD model, some of DTC No. with delta (U) mark in the following table can not be
detected by ECM depending on vehicle specification.
• With the CAN communication generic scan tool, only star (*) marked DTC No. in the following table
can be read.
• 1 driving cycle: MIL lights up when DTC is detected during 1 driving cycle.
• 2 driving cycles: MIL lights up when the same DTC is detected also in the next driving cycle after
DTC is detected and stored temporarily in the first driving cycle.
• *2 driving cycles:
MIL blinks or lights up. Refer to “DTC P0300 / P0301 / P0302 / P0303 / P0304: Random Misfire
Detected / Cylinder 1 / Cylinder 2 / Cylinder 3 / Cylinder 4 Misfire Detected” for details.

DTC No. Detecting itemDetecting condition
(DTC will set when detecting:)MIL
) *P0010Camshaft position actuator circuit
(for engine with VVT system)Oil control valve circuit open or short.1 driving
cycle
) *P0011Camshaft position – timing over-
advanced or system performance
(for engine with VVT system)Actual value of advanced valve timing does not reach
target value, or valve timing is advanced although ECM
command is most retarding.2 driving
cycles
) *P0012Camshaft position – timing over-
retarded
(for engine with VVT system)2 driving
cycles
) *P0031HO2S heater control circuit low
(Sensor-1)Heater current is less than specification while heater ON.2 driving
cycles
) *P0032HO2S heater control circuit high
(Sensor-1)Heater current is more than specification while heater ON.2 driving
cycles
)
U*P0037HO2S heater control circuit low
(Sensor-2)Heater current is less than specification while heater ON.2 driving
cycles
)
U*P0038HO2S heater control circuit high
(Sensor-2)Heater current is more than specification while heater ON.2 driving
cycles
)
U*P0101Mass air flow circuit range/
performanceMAF sensor volume is more than specification or less
than specification.2 driving
cycles
) *P0102 Mass air flow circuit low input Output voltage of MAF sensor is less than specification.1 driving
cycle
) *P0103 Mass air flow circuit high input Output voltage of MAF sensor is more than specification.1 driving
cycle
)
U*P0106Manifold absolute pressure circuit
range/performanceDifference between Max. manifold absolute pressure
value and Min. manifold pressure value is less than
specification or difference between barometric pressure
value and manifold pressure value is less than
specification2 driving
cycles
)
U*P0107Manifold absolute pressure circuit
low inputOutput voltage of MAP sensor is less than specification.
1 driving
cycle
)
U*P0108Manifold absolute pressure circuit
high inputOutput voltage of MAP sensor is more than specification.1 driving
cycle
)
U* P 0 111Intake air temperature sensor circuit
range/performanceVariation of intake air temperature from engine start is
less than specification.2 driving
cycles
) *P0112Intake air temperature sensor circuit
lowCircuit voltage of IAT sensor is less than specification.1 driving
cycle
) *P0113Intake air temperature sensor circuit
highCircuit voltage of IAT sensor is more than specification.1 driving
cycle
)
U*P0116Engine coolant temperature circuit
range/performanceEngine coolant temperature is less than specified
temperature for specified time from engine start.2 driving
cycles

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) *P0117Engine coolant temperature circuit
lowCircuit voltage of ECT sensor is less than specification.1 driving
cycle
) *P0118Engine coolant temperature circuit
highCircuit voltage of ECT sensor is more than specification.1 driving
cycle
) *P0122Throttle position sensor (main)
circuit lowOutput voltage of throttle position sensor (main) is lower
than specification.1 driving
cycle
) *P0123Throttle position sensor (main)
circuit highOutput voltage of throttle position sensor (main) is higher
than specification.1 driving
cycle
)
U*P0131O2 sensor (HO2S) circuit low
voltage (Sensor-1)Max. output voltage of HO2S-1 is less than specification.2 driving
cycles
)
U*P0132O2 sensor (HO2S) circuit high
voltage (Sensor-1)Min. output voltage of HO2S-1 is more than specification.2 driving
cycles
)
U*P0133O2 sensor (HO2S) circuit slow
response (Sensor-1)Response time of HO2S-1 output voltage between rich
and lean is longer than specification.2 driving
cycles
) *P0134O2 sensor (HO2S) circuit no activity
detected (Sensor-1)Output voltage of HO2S-1 is more than specification or
less than specification. (or HO2S-1 circuit open or short)2 driving
cycles
)
U*P0137O2 sensor (HO2S) circuit low
voltage (Sensor-2)Output voltage of HO2S-2 is less than specification while
engine is idling after driving with high engine load and
Max. output voltage of HO2S-2 minus Min. output voltage
of HO2S-2 is less than specification.2 driving
cycles
)
U*P0138O2 sensor (HO2S) circuit high
voltage (Sensor-2)Output voltage of HO2S-2 is more than specification while
engine is idling after driving with high engine load and
Max. output voltage of HO2S-2 minus Min. output voltage
of HO2S-2 is less than specification.2 driving
cycles
)
U*P0140O2 sensor (HO2S) circuit no activity
detected (Sensor-2)Output voltage of HO2S-2 is more than specification after
warming up engine.
2 driving
cycles
)
U*P0171System too leanTotal fuel trim is larger than specification for specified time
or longer. (Fuel trim toward rich side is large.)2 driving
cycles
)
U*P0172System too richTotal fuel trim is smaller than specification for specified
time or longer. (Fuel trim toward lean side is large.)2 driving
cycles
) *P0222Throttle position sensor (sub) circuit
lowOutput voltage of throttle position sensor (sub) is lower
than specification.1 driving
cycle
) *P0223Throttle position sensor (sub) circuit
highOutput voltage of throttle position sensor (sub) is higher
than specification.1 driving
cycle
)
U*P0300Random misfire detected
Misfire of such level as to cause damage to three way
catalyst or misfire of such level as to deteriorate emission.*2 driving
cycles )U*P030
1 /
U*P0302 /
U*P0303 /
U*P0304Cylinder 1 misfire detected
Cylinder 2 misfire detected
Cylinder 3 misfire detected
Cylinder 4 misfire detected
) *P0327 Knock sensor circuit low Output voltage of knock sensor is less than specification.1 driving
cycle
) *P0328 Knock sensor circuit high Output voltage of knock sensor is more than specification.1 driving
cycle
) *P0335 Crankshaft position sensor circuitNo signal of CKP sensor for specified time even if starting
motor signal is input.1 driving
cycle
) *P0340 Camshaft position sensor circuit CMP sensor pulse is out of specification.1 driving
cycle
)
U*P0401Exhaust gas recirculation flow
detected as insufficientDifference in intake manifold absolute pressure between
opened EGR valve and closed EGR valve is less than
specification.2 driving
cycles
)
U*P0402Exhaust gas recirculation flow
detected as excessive
Difference in intake manifold absolute pressure between
opened EGR valve and closed EGR valve is more than
specification.2 driving
cycles
)
U*P0403Exhaust gas recirculation control
circuitOutput voltage is different from output command with
more than one pole out of 4 poles.1 driving
cycle DTC No. Detecting itemDetecting condition
(DTC will set when detecting:)MIL

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)
U*P0420Catalyst system efficiency below
thresholdOutput waveforms of HO2S-1 and HO2S-2 are similar.2 driving
cycles
)
U*P0443Evaporative emission system purge
control valve circuitMonitor signal of EVAP canister purge valve is different
from command signal. (circuit open or shorted to ground)2 driving
cycles
) P0462 Fuel level sensor circuit lowCircuit voltage of fuel level sensor is less than
specification.—
) P0463 Fuel level sensor circuit highCircuit voltage of fuel level sensor is more than
specification.—
)
U*P0480Fan 1 control circuitMonitor signal of radiator cooling fan relay is different from
command signal.1 driving
cycle
)
UP0481Fan 2 control circuitMonitor signal of A/C condenser cooling fan relay is
different from command signal.—
) *P0500 Vehicle speed sensor No VSS signal during fuel cut for specified time or longer.2 driving
cycles
) P0532A/C refrigerant pressure sensor
circuit lowOutput voltage of A/C refrigerant pressure sensor is less
than specification.—
) P0533A/C refrigerant pressure sensor
circuit highOutput voltage of A/C refrigerant pressure sensor is more
than specification.—
) *P0601Internal control module memory
check sum errorData write error or check sum error.1 driving
cycle
) P0602 Control module programming error Data programming error.1 driving
cycle
) *P0607 Control module performance Data programming error.1 driving
cycle
)
U*P0616Starter relay circuit lowStarter signal is low voltage even though engine is started
with vehicle at stop.2 driving
cycles
)
U*P0617Starter relay circuit highStarter signal is high voltage for specified time while
engine is running.2 driving
cycles
) *P1510
ECM backup power supply
malfunctionBackup power voltage is out of specification after starting
engine.1 driving
cycle
) *P2101Throttle actuator control motor
circuit range/performanceMonitor signal of throttle actuator output (duty output) is
inconsistent with throttle actuator control command.1 driving
cycle
) *P2102Throttle actuator control motor
circuit lowPower supply voltage of throttle actuator control circuit is
lower than specification even if throttle actuator control
relay turned on.1 driving
cycle
) *P2103Throttle actuator control motor
circuit highPower supply voltage of throttle actuator control circuit is
higher than specification even if throttle actuator control
relay turned off.1 driving
cycle
) *P2111Throttle actuator control system –
stuck openThrottle valve default opening is greater than 8° from
complementary closed position when diagnosing throttle
valve at ignition switch turned OFF.1 driving
cycle
) *P2119Throttle actuator control throttle
body range/performanceDifference between actual throttle valve opening angle
and opening angle calculated by ECM is more than
specification.1 driving
cycle
) *P2122Pedal position sensor (main) circuit
low inputOutput voltage of pedal position sensor (main) is lower
than specification.1 driving
cycle
) *P2123Pedal position sensor (main) circuit
high inputOutput voltage of pedal position sensor (main) is higher
than specification.1 driving
cycle
) *P2127Pedal position sensor (sub) circuit
low inputOutput voltage of pedal position sensor (sub) is lower
than specification.1 driving
cycle
) *P2128Pedal position sensor (sub) circuit
high inputOutput voltage of pedal position sensor (sub) is higher
than specification.1 driving
cycle
) *P2135Throttle position sensor (main / sub)
voltage correlationDifference between the opening angle based on throttle
position sensor (main) and the opening angle based on
throttle position sensor (sub) is more than specification.1 driving
cycle DTC No. Detecting itemDetecting condition
(DTC will set when detecting:)MIL

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) *P2138Pedal position sensor (main / sub)
voltage correlationDifference between the opening angle based on
accelerator pedal position sensor (main) and the opening
angle based on accelerator pedal position sensor (sub) is
more than specification.1 driving
cycle
)
U*P2227Barometric pressure circuit range/
performanceDifference of barometric pressure value and intake
manifold pressure value is more than specification at
engine start.2 driving
cycles
) *P2228 Barometric pressure circuit lowBarometric pressure sensor voltage is less than
specification.1 driving
cycle
) *P2229 Barometric pressure circuit highBarometric pressure sensor voltage is more than
specification.1 driving
cycle
) U0073Control Module Communication Bus
OffTransmission error that is inconsistent between
transmission data and transmission monitor (CAN bus
monitor) data is detected more than 30 times
continuously.—
) *U0101Lost Communication With
Transmission Control ModuleReception error of communication data for TCM is
detected for longer than specified time continuously.1 driving
cycle
) *U0121Lost Communication Anti-Lock
Brake System (ABS) Control
ModuleReception error of communication data for ESP® control
module or ABS hydraulic unit / control module assembly
is detected for longer than specified time continuously.1 driving
cycle
)U0140Lost Communication With Body
Control ModuleReception error of communication data for BCM is
detected for longer than specified time continuously.—
P1614 Transponder response error
Refer to “DTC Table in Section 10C”.—
P1615ID code does not registered
(vehicle equipped with keyless start
system only)—
P1616Different registration ID codes
(vehicle equipped with keyless start
system only)—
P1618CAN communication error
(reception error for keyless start
control module) (vehicle equipped
with keyless start system only)—
P1621Immobilizer communication line
error—
P1622 EEPROM error—
P1623 Unregistered transponder—
P1625 Immobilizer antenna error—
P1636Immobilizer information registration
failure—
P1638 Immobilizer information mismatched — DTC No. Detecting item
Detecting condition
(DTC will set when detecting:)MIL

Downloaded from www.Manualslib.com manuals search engine 1A-36 Engine General Information and Diagnosis:
For Vehicle Equipped with A/TS6RW0D1104081
NOTE
There are two types of OBD system depending on the vehicle specification.
For identification, refer to “Precaution on On-Board Diagnostic (OBD) System”.

When using CAN communication OBD generic scan tool, not only the previous star (*) marked ECM DTC(s) but also
the following DTC(s) is displayed on CAN communication OBD generic scan tool simultaneously.
Fail-Safe TableS6RW0D1104006
When any of the following DTCs is detected, ECM enters fail-safe mode as long as malfunction continues to exist but
that mode is cancelled when ECM detects normal condition after that. DTC No. Detecting itemDetecting condition
(DTC will set when detecting)
P0705 Transmission range sensor circuit malfunction (PRNDL input)
Refer to “DTC Table in Section 5A”. P0707 Transmission range sensor circuit low
P0711Transmission fluid temperature sensor “A” circuit range/
performance
P0712 Transmission fluid temperature sensor circuit low
P0713 Transmission fluid temperature sensor circuit high
P0717 Input/Turbine speed sensor circuit no signal
P0722 Output speed sensor (VSS) circuit no signal
P0741 Torque converter clutch circuit performance or stuck off
P0742 Torque converter clutch circuit stuck on
P0751 Shift solenoid-A (No.1) performance or stuck off
P0752 Shift solenoid-A (No.1) stuck on
P0756 Shift solenoid-B (No.2) performance or stuck off
P0757 Shift solenoid-B (No.2) stuck on
P0787 Shift/Timing solenoid control circuit low
P0788 Shift/Timing solenoid control circuit high
P0961 Pressure control solenoid “A” control circuit range/performance
P0962 Pressure control solenoid control circuit low
P0963 Pressure control solenoid control circuit high
P0973 Shift solenoid-A (No.1) control circuit low
P0974 Shift solenoid-A (No.1) control circuit high
P0976 Shift solenoid-B (No.2) control circuit low
P0977 Shift solenoid-B (No.2) control circuit high
P1702 Internal control module memory check sum error
P1723 Range select switch malfunction
P1878 Torque converter clutch shudder
P2762Torque converter clutch (TCC) pressure control solenoid control
circuit range/performance
P2763Torque converter clutch pressure control solenoid control circuit
high
P2764Torque converter clutch pressure control solenoid control circuit
low
U0100 Lost communication with ECM/PCM “A”
DTC No. Detected item Fail-safe operation
) P0102 Mass air flow circuit low input • ECM controls injector drive time (fuel injection
volume) according to throttle valve opening
(closed throttle position or not).
• ECM stops EGR control. ) P0103 Mass air flow circuit high input
) P0112 Intake air temperature sensor circuit low ECM controls actuators assuming that intake air
temperature is 20 °C (68 °F). ) P0113 Intake air temperature sensor circuit high
) P0117 Engine coolant temperature circuit low • ECM controls actuators assuming that engine
coolant temperature is 80 °C (176 °F).
• ECM operates radiator cooling fan. ) P0118 Engine coolant temperature circuit high

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) P0122 Throttle position sensor (main) circuit low• ECM turns off throttle actuator control relay and
throttle valve is fixed at the opening of about 7°
from its completely closed position (default
opening).
• ECM controls fuel cut at specified engine speed.
• ECM stops air/fuel ratio control.
) P0123 Throttle position sensor (main) circuit high• ECM turns off throttle actuator control relay and
throttle valve is fixed at the opening of about 7°
from its completely closed position (default
opening).
• ECM controls fuel cut at specified engine speed.
• ECM stops air/fuel ratio control. ) P0222 Throttle position sensor (sub) circuit low
) P0223 Throttle position sensor (sub) circuit high
) P0335 Crankshaft position sensor circuit • Ignition timing is fixed.
) P0340 Camshaft position sensor circuitECM changes injection control system from
sequential injection to simultaneous one.
) P0500 Vehicle speed sensor• ECM controls actuators assuming that vehicle
speed is 0 km/h (0 mile/h).
• ECM stops IAC feedback control.
) P2101Throttle actuator control motor circuit range
/ performance)• ECM turns off throttle actuator control relay and
throttle valve is fixed at the opening of about 7°
from its completely closed position (default
opening).
• ECM controls fuel cut at specified engine speed. ) P2102 Throttle actuator control motor circuit low
) P2103 Throttle actuator control motor circuit highECM controls fuel cut at specified engine speed.
) P 2 111Throttle actuator control system – stuck
open)• ECM turns off throttle actuator control relay and
throttle valve is fixed at the opening of about 7°
from its completely closed position (default
opening).
• ECM controls fuel cut at specified engine speed.
) P2119Throttle actuator control throttle body range
/ performance)• ECM turns off throttle actuator control relay and
throttle valve is fixed at the opening of about 7°
from its completely closed position (default
opening).
• ECM controls fuel cut at specified engine speed.
) P2122Pedal position sensor (main) circuit low
input)
• ECM turns off throttle actuator control relay and
throttle valve is fixed at the opening of about 7°
from its completely closed position (default
opening).
• ECM controls fuel cut at specified engine speed. ) P2123Pedal position sensor (main) circuit high
input)
) P2127 Pedal position sensor (sub) circuit low input)
) P2128Pedal position sensor (sub) circuit high
input)
) P2135Throttle position sensor (main) / (sub)
voltage correlation)
) P2138Pedal position sensor (main) / (sub) voltage
correlation)
) P2228 Barometric pressure circuit low ECM controls actuators assuming that barometric
pressure is 101.33 kPa (762 mmHg). ) P2229 Barometric pressure circuit high DTC No. Detected item Fail-safe operation

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THROTTLE MOTOR RELAY (ON/OFF)
ON: Throttle actuator (motor) control activated by ECM.
OF: Throttle actuator (motor) control stopped by ECM.
VEHICLE SPEED (km/h, mph)
It is computed based on pulse signals from front wheel
speed sensor (RH, LH) (for M/T model) or output shaft
speed sensor (VSS) (for A/T model).INJ PULSE WIDTH (FUEL INJECTION PULSE WIDTH,
msec.)
This parameter indicates time of the injector drive (valve
opening) pulse which is output from ECM (but injector
drive time of NO.1 cylinder for multiport fuel injection).
Visual InspectionS6RW0D1104008
Visually check the following parts and systems.
Engine Basic InspectionS6RW0D1104009
This check is very important for troubleshooting when ECM has detected no DTC and no abnormality has been found
in “Visual Inspection”.
Follow the flow carefully.Inspection item Reference section
• Engine oil – level, leakage “Engine Oil and Filter Change in Section 0B”
• Engine coolant – level, leakage “Coolant Level Check in Section 1F”
• Fuel – level, leakage“Fuel Lines and Connections Inspection in
Section 0B”
• Air cleaner element – dirt, clogging “Air Cleaner Filter Inspection in Section 0B”
• Battery – fluid level, corrosion of terminal“Battery Dismounting and Remounting in
Section 1J”
• Water pump belt – tension damage“Accessory Drive Belt Inspection in Section
0B”
• Throttle valve – operating sound“Electric Throttle Body Assembly On-Vehicle
Inspection in Section 1C”
• Vacuum hoses of air intake system – disconnection, looseness,
deterioration, bend“Vacuum Hose Inspection in Section 1B”
• Connectors of electric wire harness – disconnection, friction
• Fuses – burning
• Parts – installation, bolt – looseness
• Parts – deformation
• Other parts that can be checked visually
Also check the following items at engine start, if possible
• Malfunction indicator lamp – Operation “Malfunction Indicator Lamp (MIL) Check”
• Charge warning lamp – Operation “Generator Symptom Diagnosis in Section 1J”
• Engine oil pressure warning lamp – Operation “Oil Pressure Switch Inspection in Section 9C”
• Engine coolant temp. meter – Operation“Engine Coolant Temperature (ECT) Sensor
Inspection in Section 1C”
• Fuel level meter – Operation “Fuel Level Sensor Inspection in Section 9C”
• Tachometer – Operation
• Abnormal air being inhaled from air intake system
• Exhaust system – leakage of exhaust gas, noise
• Other parts that can be checked visually
Step Action Yes No
1Was “Engine and Emission Control System Check”
performed?Go to Step 2. Go to “Engine and
Emission Control
System Check”.
2Check battery voltage
Is it 11 V or more?Go to Step 3. Charge or replace
battery.
3Is vehicle equipped with keyless start control system?Go to Step 4. Go to Step 5.

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4Check keyless start control system malfunction
1) Check keyless start control system referring to “Keyless
Start System Operation Inspection in Section 10E”.
Is check result satisfactory?Go to Step 5. Keyless start control
system malfunction.
5Is engine cranked?Go to Step 6. Go to “Cranking System
Symptom Diagnosis in
Section 1I”.
6Does engine start?Go to Step 7. Go to Step 9.
7Check idle speed
1) Check engine idle speed referring to “Idle Speed and
IAC Throttle Valve Opening Inspection”.
Is check result as specified?Go to Step 8. Go to “Engine Symptom
Diagnosis”.
8Check ignition timing
1) Check ignition timing referring to “Ignition Timing
Inspection in Section 1H”.
Is check result as specified?Go to “Engine Symptom
Diagnosis”.Check ignition control
related parts referring to
“Ignition Timing
Inspection in Section
1H”.
9Check immobilizer system malfunction
1) Check immobilizer indicator lamp for flashing.
Is it flashing when ignition switch is turned to ON position?Go to “DTC Check in
Section 10C”.Go to Step 10.
10Check fuel supply
1) Check to make sure that enough fuel is filled in fuel tank.
2) Turn ON ignition switch for 2 seconds and then OFF.
3) Repeat Step 2) a few times.
Is fuel pressure felt from fuel feed hose when ignition switch
is turned ON?Go to Step 12. Go to Step 11.
11Check fuel pump for operation
Was fuel pump operating sound heard from fuel filler for
about 2 seconds after ignition switch ON and stop?Go to “Fuel Pressure
Check”.Go to “Fuel Pump and
Its Circuit Check”.
12Check ignition spark
1) Check ignition spark referring to “Ignition Spark Test in
Section 1H”.
Is it in good condition?Go to Step 13. Go to “Ignition System
Symptom Diagnosis in
Section 1H”.
13Check fuel injector circuit
1) Check fuel injector circuit referring to “Fuel Injector
Circuit Check.”
Is it in good condition?Go to “Engine Symptom
Diagnosis”.Go to “Fuel Injector
Circuit Check”. Step Action Yes No
I5RW0A110014-01

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Engine Symptom DiagnosisS6RW0D1104010
Perform troubleshooting referring to the followings when ECM has detected no DTC and no abnormality has been
found in “Visual Inspection” and “Engine Basic Inspection”.
Condition Possible cause Correction / Reference Item
Hard starting (Engine
cranks OK)Faulty spark plug“Spark Plug Inspection in Section 1H”
Leaky high-tension cord“High-Tension Cord Inspection in Section 1H”
Loose connection or disconnection of
high-tension cord(s) or lead wire(s)“High-Tension Cord Removal and Installation
in Section 1H”
Faulty ignition coil“Ignition Coil Assembly (Including Ignitor)
Inspection in Section 1H”
Dirty or clogged fuel hose or pipe“Fuel Pressure Check”
Malfunctioning fuel pump“Fuel Pressure Check”
Air drawn in through intake manifold
gasket or throttle body gasket
Faulty electric throttle body assembly“Electric Throttle Body Assembly On-Vehicle
Inspection in Section 1C”
Faulty APP sensor assembly“Accelerator Pedal Position (APP) Sensor
Assembly Inspection in Section 1C”
Faulty ECT sensor or MAF sensor“Engine Coolant Temperature (ECT) Sensor
Inspection in Section 1C” or “Intake Air
Temperature (IAT) Sensor Inspection in
Section 1C”
Faulty ECM
Low compression“Compression Check in Section 1D”
Poor spark plug tightening or faulty
gasket“Spark Plug Removal and Installation in
Section 1H”
Compression leak from valve seat“Valves and Valve Guides Inspection in
Section 1D”
Sticky valve stem“Valves and Valve Guides Inspection in
Section 1D”
Weak or damaged valve springs“Valve Spring Inspection in Section 1D”
Compression leak at cylinder head
gasket“Cylinder Head Inspection in Section 1D”
Sticking or damaged piston ring“Cylinders, Pistons and Piston Rings
Inspection in Section 1D”
Worn piston, ring or cylinder“Cylinders, Pistons and Piston Rings
Inspection in Section 1D”
Malfunctioning PCV valve“PCV Valve Inspection in Section 1B”
Camshaft position control (VVT) system
out of order (for engine with VVT
system)“Oil Control Valve Inspection (For Engine with
VVT) in Section 1D”
Faulty EGR system“EGR System Inspection (If Equipped) in
Section 1B”
Low oil pressureImproper oil viscosity“Engine Oil and Filter Change in Section 0B”
Malfunctioning oil pressure switch“Oil Pressure Switch Inspection in Section 9C”
Clogged oil strainer“Oil Pan and Oil Pump Strainer Cleaning in
Section 1E”
Functional deterioration of oil pump“Oil Pump Inspection in Section 1E”
Worn oil pump relief valve“Oil Pump Inspection in Section 1E”
Excessive clearance in various sliding
parts

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Excessive detonation –
Engine makes
continuously sharp
metallic knocks that
change with throttle
opening. Sounds like pop
corn popping.Faulty spark plug“Spark Plug Inspection in Section 1H”
Loose connection of high-tension cord“High-Tension Cord Removal and Installation
in Section 1H”
Engine overheatingCondition “Engine overheating”
Clogged fuel filter (faulty fuel pump) or
fuel lines“Fuel Pressure Check” or “Fuel Pump and Its
Circuit Check”
Air drawn in through intake manifold or
throttle body gasket
Malfunctioning EGR valve“EGR Valve Inspection (If Equipped) in Section
1B”
Poor performance of knock sensor, ECT
sensor or MAF sensor“DTC P0327 / P0328: Knock Sensor Circuit
Low / High”, “Engine Coolant Temperature
(ECT) Sensor Inspection in Section 1C” or
“Intake Air Temperature (IAT) Sensor
Inspection in Section 1C”
Faulty fuel injector(s)“Fuel Injector Circuit Check”
Faulty ECM
Excessive combustion chamber
deposits“Cylinders, Pistons and Piston Rings
Inspection in Section 1D” and/or “Piston Pins
and Connecting Rods Inspection in Section
1D”
Camshaft position control (VVT) system
out of order (for engine with VVT
system)“Oil Control Valve Inspection (For Engine with
VVT) in Section 1D”
Engine has no powerFaulty spark plug“Spark Plug Inspection in Section 1H”
Faulty ignition coil with ignitor“Ignition Coil Assembly (Including Ignitor)
Inspection in Section 1H”
Leaks, loose connection or
disconnection of high-tension cord“High-Tension Cord Removal and Installation
in Section 1H”
Faulty knock sensor“DTC P0327 / P0328: Knock Sensor Circuit
Low / High”
Clogged fuel hose or pipe“Fuel Pressure Check”
Malfunctioning fuel pump“Fuel Pump and Its Circuit Check”
Air drawn in through intake manifold
gasket or throttle body gasket
Engine overheatingCondition “Engine overheating”
Malfunctioning EGR valve“EGR Valve Inspection (If Equipped) in Section
1B”
Poor performance of ECT sensor or
MAF sensor“Engine Coolant Temperature (ECT) Sensor
Inspection in Section 1C” or “Intake Air
Temperature (IAT) Sensor Inspection in
Section 1C”
Faulty electric throttle body assembly“Electric Throttle Body Assembly On-Vehicle
Inspection in Section 1C”
Faulty APP sensor assembly“Accelerator Pedal Position (APP) Sensor
Assembly Inspection in Section 1C”
Faulty fuel injector(s)“Fuel Injector Circuit Check”
Faulty ECM
Dragging brakesCondition “Dragging brakes” in “Brakes
Symptom Diagnosis in Section 4A”
Slipping clutch (for M/T model)Condition “Slipping clutch” in “Clutch System
Symptom Diagnosis in Section 5C” (for M/T
model)
Low compression“Compression Check in Section 1D”
Camshaft position control (VVT) system
out of order (for engine with VVT
system)“Oil Control Valve Inspection (For Engine with
VVT) in Section 1D” Condition Possible cause Correction / Reference Item