:  Dec 17, 2007



Overview

For information on the operation of the system, refer to the relevant workshop manual section.

Inspection and verification

. Verify the customer concern.

. Visually inspect for obvious mechanical or electrical faults.

Mechanical Electrical
  • Engine oil level
  • Cooling system coolant level
  • Fuel level
  • Fuel contamination/grade/quality
  • Exhaust gas recirculation (EGR) valves
  • Fuses
  • Wiring harness
  • Loose or corroded electrical connectors
  • Ignition coils
  • Sensor(s)
  • Engine control module (ECM)
  • Transmission control module (TCM)

. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.

. Use the approved diagnostic system or a scan tool to retrieve any diagnostic trouble codes (DTCs) before moving onto the symptom chart or DTC index.
  Make sure that all DTCs are cleared following rectification.
Make sure that all DTCs are cleared following rectification.

Symptom Chart

Symptom (general) Symptom (specific) Possible causes Action
Non-Start Engine cranks, but does not fire
  • Low/Contaminated fuel
  • Ignition system
  • Fuel system
  • Crankshaft position (CKP) sensor
  • Harness
  • ECM fault
Check the fuel level and condition. For ignition system tests, refer to the coil failure DTCs in this index. Check the fuel system. Check the CKP sensor circuits. Refer to the relevant workshop manual section. Refer to the warranty policy and procedures manual if a module is suspect.
Engine cranks and fires, but will not start
  • Evaporative emissions purge valve
  • Fuel system
  • Spark plugs
  • Ignition coil failure(s)
  • Harness
Check the evaporative emissions purge valve. Check the fuel system. Refer to the relevant workshop manual section. Check the spark plug conditions and gaps. For ignition coil tests, refer to the coil failure DTCs in this index.
Difficult to start Difficult to start hot
  • Injector leak
  • Fuel system
  • Fuel temperature sensor
  • Intake air temperature (IAT) sensor
  • Mass air flow (MAF) sensor
  • Evaporative emissions purge valve
  • Ignition system
Check the fuel injectors and fuel system. Check the fuel temperature, IAT and MAF sensor circuits. Check the evaporative emissions purge valve. Refer to the relevant workshop manual section. For ignition coil tests, refer to the coil failure DTCs in this index.
Difficult to start after hot soak (vehicle standing after engine has reached operating temperature)
  • Injector leak
  • Fuel system
  • Fuel temperature sensor
  • IAT sensor
  • MAF sensor
  • Evaporative emissions purge valve
  • Ignition system
Check the fuel injectors and fuel system. Check the fuel temperature, IAT and MAF sensor circuits. Check the evaporative emissions purge valve. For ignition coil tests, refer to the coil failure DTCs in this index. Refer to the relevant workshop manual section.
Engine stalls Engine stalls soon after start
  • Breather system disconnected/restricted
  • ECM relay
  • MAF sensor
  • Ignition system
  • Air filter restricted
  • Air leakage
  • Fuel lines
Check the engine breather system. Check the ECM relay operation. Check the MAF sensor circuits. For ignition coil tests, refer to the coil failure DTCs in this index. For intake air system information. Check the fuel lines for leaks/damage. Refer to the relevant workshop manual section.
Poor driveability Engine hesitates/poor acceleration
  • Fuel pump module
  • Fuel lines
  • Injector leak
  • Fuel pressure
  • Air leakage
  • TP sensors
  • Throttle motor
  • Ignition system
  • EGR valve stuck
  • HO2 sensors
  • Transmission malfunction
  • Restricted pedal travel (carpet, etc)
  • Accelerator pedal position (APP) sensor
Check the fuel pump module operation. Check the fuel lines for leaks/damage. Check the fuel injectors. Check the intake air system for leaks. Check the TP sensor and throttle motor circuits. For ignition coil tests, refer to the coil failure DTCs in this index. Check the EGR valves. Check for DTCs relating to HO2 sensors. For transmission information. Check the accelerator pedal travel. Check the APP sensor circuits. Refer to the relevant workshop manual section.
Engine backfires
  • Fuel pump module
  • Fuel lines
  • Air leakage
  • MAF sensor
  • HO2 sensors
  • Ignition system
  • Sticking variable camshaft timing (VCT) hub
  • APP sensor
Check the fuel pump module operation. Check the fuel lines for leaks/damage. Check the intake air system for leaks. Check the MAF sensor circuits. Check for DTCs relating to HO2 sensors. For ignition coil tests, refer to the coil failure DTCs in this index. Check the VCT and APP sensor circuits. Refer to the relevant workshop manual section.
Engine surges
  • Fuel pump module
  • Fuel lines
  • MAF sensor
  • Harness
  • TP sensors
  • Throttle motor
  • Ignition system
Check the fuel pump module operation. Check the fuel lines for leaks/damage. Check the MAF sensor, TP sensor and throttle motor circuits, refer to the electrical guides. For ignition coil tests, refer to the coil failure DTCs in this index.

DTC index

:
  Generic scan tools may not read the codes listed, or may read only 5-digit codes. Match the 5 digits from the scan tool to the first 5 digits of the 7-digit code listed to identify the fault (the last 2 digits give extra information read by the manufacturer-approved diagnostic system).

:
  For a full list of ECM DTCs, refer to workshop manual section 303-14 - Electronic Engine Controls.

DTC Description Possible causes Action
P030000 Random/Multiple cylinder misfire detected
  • ECM to ignition coil primary circuit faults (cylinder misfire detected DTCs also logged)
  • Ignition coil failure
  • Spark plug failure/fouled/incorrect gap
  • Fuel delivery pressure (low/high)
  • Fuel injector circuit fault(s) (injector DTCs also logged)
  • Fuel injectors restricted/leaking
  • Fuel injectors continuously open
  • Fuel contamination
  • Cylinder compression low
  • Worn camshaft/broken valve springs
  • Valve clearance adjustment
For ignition coil tests, refer to the coil failure DTCs in this index. Check the spark plug conditions and gaps. Check the fuel pressure, check for fuel injector DTCs and refer to the relevant workshop manual section.
P030100 Cylinder 1 Misfire Detected
  • Refer to P030000 possible sources
For ignition coil tests, refer to the guided diagnostic routine ETALQ for this code on the approved diagnostic system. Check the spark plug condition and gap. Check the fuel pressure, check for fuel injector DTCs and refer to the relevant workshop manual section.
P030200 Cylinder 2 Misfire Detected
  • Refer to P030000 possible sources
For ignition coil tests, refer to the guided diagnostic routine ETALT for this code on the approved diagnostic system. Check the spark plug condition and gap. Check the fuel pressure, check for fuel injector DTCs and refer to the relevant workshop manual section.
P030300 Cylinder 3 Misfire Detected
  • Refer to P030000 possible sources
For ignition coil tests, refer to the guided diagnostic routine ETALR for this code on the approved diagnostic system. Check the spark plug condition and gap. Check the fuel pressure, check for fuel injector DTCs and refer to the relevant workshop manual section.
P030400 Cylinder 4 misfire detected
  • Refer to P030000 possible sources
For ignition coil tests, refer to the guided diagnostic routine ETALU for this code on the approved diagnostic system. Check the spark plug condition and gap. Check the fuel pressure, check for fuel injector DTCs and refer to the relevant workshop manual section.
P030500 Cylinder 5 misfire detected
  • Refer to P030000 possible sources
For ignition coil tests, refer to the guided diagnostic routine ETALS for this code on the approved diagnostic system. Check the spark plug condition and gap. Check the fuel pressure, check for fuel injector DTCs and refer to the relevant workshop manual section.
P030600 Cylinder 6 misfire detected
  • Refer to P030000 possible sources
For ignition coil tests, refer to the guided diagnostic routine ETALV for this code on the approved diagnostic system. Check the spark plug condition and gap. Check the fuel pressure, check for fuel injector DTCs and refer to the relevant workshop manual section.
P030700 Cylinder 7 misfire detected
  • Refer to P030000 possible sources
For ignition coil tests, refer to the guided diagnostic routine ETAME for this code on the approved diagnostic system. Check the spark plug condition and gap. Check the fuel pressure, check for fuel injector DTCs and refer to the relevant workshop manual section.
P030800 Cylinder 8 misfire detected
  • Refer to P030000 possible sources
For ignition coil tests, refer to the guided diagnostic routine ETAMF for this code on the approved diagnostic system. Check the spark plug condition and gap. Check the fuel pressure, check for fuel injector DTCs and refer to the relevant workshop manual section.
P031600 Misfire Detected On Startup (First 1000 Revolutions)
  • Misfire detected on first 1000 revs
  • Refer to P030000 possible sources
Carry out the tests indicated for a normal misfire code, but on a cold engine.
P035100 Cylinder 1 ignition coil primary/secondary circuit
  • ECM to ignition module/coil drive circuit: high resistance, short circuit to ground
  • Ignition module/coil ground circuit: high resistance
  • Ignition module/coil battery supply circuit: high resistance (including relay, if installed)
Refer to the electrical guides and check the ignition coil circuits. For ignition system tests, refer to the relevant workshop manual section. Refer to the guided diagnostic routine ETALQ for this code on the approved diagnostic system.
P035200 Cylinder 2 ignition coil primary/secondary circuit
  • ECM to ignition module/coil drive circuit: high resistance, short circuit to ground
  • Ignition module/coil ground circuit: high resistance
  • Ignition module/coil battery supply circuit: high resistance (including relay, if installed)
Refer to the electrical guides and check the ignition coil circuits. For ignition system tests, refer to the relevant workshop manual section. Refer to the guided diagnostic routine ETALT for this code on the approved diagnostic system.
P035300 Cylinder 3 ignition coil primary/secondary circuit
  • ECM to ignition module/coil drive circuit: high resistance, short circuit to ground
  • Ignition module/coil ground circuit: high resistance
  • Ignition module/coil battery supply circuit: high resistance (including relay, if installed)
Refer to the electrical guides and check the ignition coil circuits. For ignition system tests, refer to the relevant workshop manual section. Refer to the guided diagnostic routine ETALR for this code on the approved diagnostic system.
P035400 Cylinder 4 ignition coil primary/secondary circuit
  • ECM to ignition module/coil drive circuit: high resistance, short circuit to ground
  • Ignition module/coil ground circuit: high resistance
  • Ignition module/coil battery supply circuit: high resistance (including relay, if installed)
Refer to the electrical guides and check the ignition coil circuits. For ignition system tests, refer to the relevant workshop manual section. Refer to the guided diagnostic routine ETALU for this code on the approved diagnostic system.
P035500 Cylinder 5 ignition coil primary/secondary circuit
  • ECM to ignition module/coil drive circuit: high resistance, short circuit to ground
  • Ignition module/coil ground circuit: high resistance
  • Ignition module/coil battery supply circuit: high resistance (including relay, if installed)
Refer to the electrical guides and check the ignition coil circuits. For ignition system tests, refer to the relevant workshop manual section. Refer to the guided diagnostic routine ETALS for this code on the approved diagnostic system.
P035600 Cylinder 6 ignition coil primary/secondary circuit
  • ECM to ignition module/coil drive circuit: high resistance, short circuit to ground
  • Ignition module/coil ground circuit: high resistance
  • Ignition module/coil battery supply circuit: high resistance (including relay, if installed)
Refer to the electrical guides and check the ignition coil circuits. For ignition system tests, refer to the relevant workshop manual section. Refer to the guided diagnostic routine ETALV for this code on the approved diagnostic system.
P035700 Cylinder 7 ignition coil primary/secondary circuit
  • ECM to ignition module/coil drive circuit: high resistance, short circuit to ground
  • Ignition module/coil ground circuit: high resistance
  • Ignition module/coil battery supply circuit: high resistance (including relay, if installed)
Refer to the electrical guides and check the ignition coil circuits. For ignition system tests, refer to the relevant workshop manual section. Refer to the guided diagnostic routine ETAME for this code on the approved diagnostic system.
P035800 Cylinder 8 ignition coil primary/secondary circuit
  • ECM to ignition module/coil drive circuit: high resistance, short circuit to ground
  • Ignition module/coil ground circuit: high resistance
  • Ignition module/coil battery supply circuit: high resistance (including relay, if installed)
Refer to the electrical guides and check the ignition coil circuits. For ignition system tests, refer to the relevant workshop manual section. Refer to the guided diagnostic routine ETAMF for this code on the approved diagnostic system.
P131500 Persistent Misfire
  • ECM to ignition coil primary circuit fault (cylinder misfire detected DTC also flagged)
  • Ignition coil failure
  • Spark plug failure/fouled/incorrect gap
  • Fuel delivery pressure low
  • Fuel injector circuit fault(s) (injector DTCs also flagged)
  • Cylinder compression low
For ignition coil tests, refer to the coil failure DTCs in this index. Check the spark plug conditions and gaps. Check the fuel pressure, check for fuel injector DTCs and refer to the relevant workshop manual section.
P136700 Ignition Spare
  • Ignition coil group A monitoring circuit to ECM high resistance, short circuit to ground, short circuit to power
  • Ignition module/coils ground circuit fault, right hand bank
Refer to the electrical guides and check the ignition monitoring circuit between the ignition coils and ECM. Repair as necessary. For ignition coil tests, refer to the coil failure DTCs in this index.
P136800 Ignition Spare
  • Ignition coil group B monitoring circuit to ECM high resistance, short circuit to ground, short circuit to power
  • Ignition module/coils ground circuit fault left hand bank
Refer to the electrical guides and check the ignition monitoring circuit between the ignition coils and ECM. Repair as necessary. For ignition coil tests, refer to the coil failure DTCs in this index.