:  Dec 17, 2007



Overview

For information on the system operation, refer to section 310-01 - Fuel Tank and Lines in the workshop manual.

Inspection and Verification

  : Eye protection must be worn at all times when working on or near any fuel related components. Failure to follow this instruction may result in personal injury.

  : This procedure involves fuel handling. Be prepared for fuel spillage at all times and always observe fuel handling precautions. Failure to follow this instruction may result in personal injury.

  : If taken internally, DO NOT induce vomiting. Seek immediate medical attention. Failure to follow this instruction may result in personal injury.

  : If fuel contacts the eyes, flush the eyes with cold water or eyewash solution and seek medical attention. Failure to follow this instruction may result in personal injury.

  : Wash hands thoroughly after handling, as prolonged contact may cause irritation. Should irritation develop, seek medical attention. Failure to follow this instruction may result in personal injury.

  : Before disconnecting any part of the system, it is imperative that all dust, dirt and debris is removed from around components to prevent ingress of foreign matter into the fuel system. Failure to follow this instruction may result in damage to the vehicle.

  : It is essential that absolute cleanliness is observed when working with these components. Always install blanking plugs to any open orifices or lines. Failure to follow this instruction may result in damage to the vehicle.

. Verify the customer concern.

. Visually inspect for obvious mechanical or electrical faults.

Mechanical Electrical
  • Fuel level
  • Fuel contamination/grade/quality
  • Fuel filter
  • Fuel leaks
  • Damaged fuel lines
  • Damaged push connect fittings
  • Fuel filler cap
  • Fuel tank filler pipe
  • Roll over valves (ROVs)
  • Battery charge and condition
  • Fuse(s)
  • Inertia fuel shutoff (IFS) switch
  • Loose or corroded electrical connectors
  • Harnesses
  • Fuel pump relay
  • Fuel pump module
  • Engine control module (ECM)

. 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 Possible causes Action
Engine cranks, but does not fire
  • Inertia fuel shutoff (IFS) switch
  • Low/Contaminated fuel
  • Engine breather system disconnected/restricted
  • Ignition system
  • Fuel leak
  • Blocked fuel filter
  • Fuel pump module fault
  • Crankshaft position (CKP) sensor
  • ECM fault
Check that the inertia switch has not tripped. Check the fuel level/condition. Check the engine breather system. Check for ignition system DTCs. Check the fuel system for leaks/damage. Check the fuel filter for a blockage/restriction. Check the fuel pump module operation. Check the CKP sensor. Refer to the relevant section of the workshop manual. 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
  • Low fuel pressure
  • Fuel leak
  • Blocked fuel filter
  • Fuel pump module fault
  • Spark plugs
  • HT short to ground (tracking) check rubber boots for cracks/damage
  • Ignition coil failure(s)
  • Harness
Check the evaporative emissions purge valve. Check the fuel pressure. Check the fuel system for leaks/damage. Check the fuel filter for a blockage/restriction. Check the fuel pump module operation. Check the spark plugs and ignition coils. Refer to the relevant section of the workshop manual.
Difficult to start after hot soak (vehicle standing after engine has reached operating temperature)
  • Injector leak
  • Fuel temperature sensor
  • Intake air temperature (IAT) sensor
  • Mass air flow (MAF) sensor
  • Evaporative emissions purge valve
  • Fuel pump module fault
  • Ignition system
Check the fuel injectors. Check the fuel temperature sensor, check the IAT and MAF sensor circuits. Check the evaporative emissions purge valve. Check the operation of the fuel pump module. Check the spark plugs and ignition coil circuits. Refer to the relevant section of the workshop manual.
Engine stalls soon after start
  • Breather system disconnected/restricted
  • ECM relay
  • Harness
  • MAF sensor
  • Ignition system
  • Air cleaner restricted
  • Air leakage
  • Fuel lines
  • Fuel rail pressure (FRP) sensor
Check the engine breather system. Check the ECM relay and circuits. Check the MAF sensor circuits. Check the spark plugs and ignition coil circuits. Check for a restricted air cleaner. Check the intake air system for leaks. Check the fuel lines for leaks/damage. Check the FRP sensor circuits. Refer to the relevant section of the workshop manual.
Engine hesitates/poor acceleration
  • Restricted pedal travel (carpet, etc)
  • Exhaust gas recirculation (EGR) valve stuck open
  • Ignition system
  • Air leakage
  • Heated oxygen (HO2) sensors
  • Fuel pressure
  • Blocked fuel filter
  • Fuel lines
  • Fuel pump module fault
  • Injector leak
  • Throttle position (TP) sensors
  • Throttle motor
  • Accelerator pedal position (APP) sensor
  • Transmission malfunction
Check the accelerator pedal travel. Check the spark plugs and ignition coil circuits. Check the intake air system for leaks. Check the HO2 sensor circuits. Check the fuel pressure. Check the fuel filter for a blockage/restriction. Check the fuel system for leaks/damage. Check the fuel pump module operation. Check the fuel injectors. Check the TP sensor, throttle motor and APP sensor circuits. Refer to the relevant section of the workshop manual.
Engine backfires
  • Ignition system
  • Air leakage
  • Fuel lines
  • Fuel pump module fault
  • MAF sensor
  • HO2 sensors
  • APP sensor
Check the spark plugs and ignition coil circuits. Check the intake air system for leaks. Check the fuel system for leaks/damage. Check the fuel pump module operation. Check the MAF, HO2 and APP sensor circuits. Refer to the relevant section of the workshop manual.
Engine surges
  • Fuel lines
  • Fuel pump module fault
  • MAF sensor
  • Harness
  • TP sensors
  • Throttle motor
  • Ignition system
  • ECM fault
Check the fuel system for leaks/damage. Check the fuel pump module operation. Check the MAF sensor, TP sensor and throttle motor circuits. Check the ignition coil circuits. Refer to the relevant section of the workshop manual. Refer to the warranty policy and procedures manual if a module is suspect.
Engine detonates/knocks
  • Fuel quality
  • Fuel lines
  • Fuel pump module fault
  • Air leakage
  • FRP sensor
  • Knock sensor (KS)/circuit malfunction
  • MAF sensor
  • HO2 sensors
  • BARO sensor malfunction (internal ECM fault)
Check the fuel for contamination/grade/quality. Check the fuel system for leaks/damage. Check the fuel pump module operation. Check the intake air system for leaks. Check the FRP, KS, MAF and HO2 sensor circuits. Refer to the relevant section of the workshop manual. Refer to the warranty policy and procedures manual if a module is suspect.

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 section 303-14 - Electronic Engine Controls in the workshop manual.

DTC Description Possible causes Action
P017100 System Too Lean (Bank 1)
  • Air intake leak between MAF sensor and cylinder head
  • MAF sensor fault (low intake air flow)
  • Low fuel pressure
  • Fuel filter/system restriction
  • Fuel pump module fault
  • Fuel injector restriction
  • Exhaust leak (before catalyst)
  • Evaporative emission system fault
Check the intake air system for leaks. Check the MAF sensor condition and circuits. Check the fuel pressure. Check the fuel filter for a blockage/restriction. Check the fuel system for leaks/damage. Check the fuel pump module operation. Check the fuel injectors. Check the exhaust system for leaks, etc. Refer to the relevant section of the workshop manual. Check for evaporative emission DTCs.
P017200 System Too Rich (Bank 1)
  • Restricted air filter
  • High fuel pressure
  • Leaking fuel injector(s)
  • Oil contaminated with fuel (too many cold starts with vehicle subsequently not getting hot enough for long enough)
  • MAF sensor fault
  • Evaporative emission system fault
Check the intake air system for restrictions. Check the fuel system for leaks and check the fuel pressure. Check the fuel injectors. Check for fuel system DTCs. Check the oil for contamination/grade/quality. Refer to the relevant section of the workshop manual. Check for MAF sensor and evaporative emission DTCs.
P017400 System Too Lean (Bank 2)
  • Air intake leak between MAF sensor and cylinder head
  • MAF sensor fault (low intake air flow)
  • Fuel filter/system restriction
  • Low fuel pressure
  • Fuel injector restriction
  • Exhaust leak (before catalyst)
  • Evaporative emission system fault
Check the intake air system for leaks, etc. Check the fuel system for restrictions, DTCs, etc. Check the exhaust system for leaks, etc. Refer to the relevant section of the workshop manual. Check for evaporative emission DTCS.
P017500 System Too Rich (Bank 2)
  • Restricted air filter
  • High fuel pressure
  • Leaking fuel injector(s)
  • Oil contaminated with fuel (too many cold starts with vehicle subsequently not getting hot enough for long enough)
  • MAF sensor fault
  • Evaporative emission system fault
Check the intake air system for restrictions, etc. Check the fuel system for leaks, DTCs, etc. Check the oil condition. Refer to the relevant section of the workshop manual. Check for MAF sensor and evaporative emission DTCs.
P030000 Random 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
  • Valve clearance adjustment
  • Worn camshaft/broken valve springs
Check for ignition coil DTCs. Check the condition of the spark plugs and the gaps. Check the fuel pressure. Check for fuel injector DTCs. Check the fuel for contamination/grade/quality. Check the cylinder compressions, check the valve clearances, check the condition of the camshaft and valve springs. Refer to the relevant section of the workshop manual.
P046129 Fuel Level Sensor A Circuit Range/Performance
  • Fuel level sensor circuits intermittent short circuit or high resistance
  • Fuel level sensor failure
Refer to the electrical guides and check the fuel gauge sender unit circuit. Repair/renew as necessary.
P04612F Fuel Level Sensor A Circuit Range/Performance
  • Fuel level sensor circuits intermittent short circuit or high resistance
  • Fuel level sensor failure
Refer to the electrical guides and check the fuel gauge sender unit circuit. Repair/renew as necessary.
P046200 Fuel Level Sensor A Circuit Low
  • Fuel level sensor circuits intermittent short circuit to ground or high resistance
  • Fuel level sensor failure
Refer to the electrical guides and check the fuel gauge sender unit circuit. Repair/renew as necessary.
P046300 Fuel Level Sensor A Circuit High
  • Fuel level sensor circuits intermittent short circuit to power
  • Fuel level sensor failure
Refer to the electrical guides and check the fuel gauge sender unit circuit. Repair/renew as necessary.
P062800 Fuel Pump A Control Circuit Low
  • Fuel pump control circuit short circuit to ground
  • Fuel pump control circuit high resistance
  • Fuel pump relay fault
Refer to the electrical guides and check the fuel pump circuits. Activate the relay and listen for an audible 'click'. Repair/renew as necessary. Clear the DTCs and test for normal operation.
P062900 Fuel Pump A Control Circuit High
  • Fuel pump control circuit short circuit to power
  • Fuel pump relay fault
Refer to the electrical guides and check the fuel pump circuits. Activate the relay and listen for an audible 'click'. Repair/renew as necessary. Clear the DTCs and test for normal operation.
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)
  • Fuel contamination
  • Cylinder compression low
Check for ignition coil DTCs. Check the condition of the spark plugs and the gaps. Check the fuel pressure. Check for fuel injector DTCs. Check the fuel for contamination/grade/quality. Check the cylinder compressions. Refer to the relevant section of the workshop manual.