:  Dec 17, 2007



Overview

For information on the operation of the system, refer to the workshop manual section 303-04 - Fuel Charging and Controls.

Inspection and Verification

. Verify the customer concern.

. Visually inspect for obvious mechanical or electrical faults.

Mechanical Electrical
  • Fuel leaks
  • Damaged fuel lines
  • Damaged push connect fittings
  • Fuel level
  • Fuel contamination/grade/quality
  • Throttle body
  • Damaged fuel tank filler pipe cap
  • Damaged fuel tank filler pipe
  • Fuses
  • Inertia switch
  • Loose or corroded electrical connectors
  • Harnesses
  • Sensor(s)
  • 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
  • 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 relevant section of the workshop manual. Check for injector DTCs. For CKP and harness tests. 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
  • Fuel system
  • Spark plugs
  • Ignition coil failure(s)
For purge valve tests, refer to the relevant section of the workshop manual. Check for injector DTCs. For ignition system tests, refer to the relevant section of the workshop manual.
Difficult to start cold
  • Check coolant anti-freeze content
  • Battery
  • Crankshaft position (CKP) sensor
  • Exhaust gas recirculation (EGR) valve stuck open
  • Fuel system
  • Evaporative emissions purge valve
For battery information, refer to the relevant section of the workshop manual. For CKP sensor tests, refer to the relevant section of the workshop manual. Check for injector DTCs. For purge valve tests, refer to the relevant section of the workshop manual.
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 for injector DTCs. For fuel temperature sensor, IAT sensor and MAF sensor tests, refer to the relevant section of the workshop manual. For purge valve and ignition system tests, 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 system
  • Fuel temperature sensor
  • IAT sensor
  • MAF sensor
  • Evaporative emissions purge valve
  • Ignition system
Check for injector DTCs. For fuel temperature sensor, IAT sensor and MAF sensor tests, refer to the relevant section of the workshop manual. For purge valve and ignition system tests, refer to the relevant section of the workshop manual.
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. For MAF sensor and FRP sensor and ignition system tests, refer to the relevant section of the workshop manual. For air intake and fuel line information, refer to the relevant section of the workshop manual.
Engine hesitates/poor acceleration
  • Fuel pump
  • Fuel lines
  • Injector leak
  • Fuel pressure
  • Air leakage
  • Throttle position (TP) sensors
  • Accelerator pedal position (APP) sensor
  • Throttle motor
  • Ignition system
  • EGR valve stuck
  • HO2 sensors
  • Transmission malfunction
  • Restricted pedal travel (carpet, etc)
For fuel pump and fuel line information, refer to the relevant section of the workshop manual. Check for injector DTCs. For intake system checks, TP sensor and APP sensor tests, refer to the relevant section of the workshop manual. For throttle motor tests refer to the guided diagnostic routine on the approved diagnostic system. For ignition system tests, refer to the relevant section of the workshop manual. Check for DTCs relating to HO2 sensors, refer to the DTC index. For transmission information, refer to the relevant section of the workshop manual. Check the accelerator pedal travel.
Engine backfires
  • Fuel pump
  • Fuel lines
  • Air leakage
  • MAF sensor
  • APP sensor
  • HO2 sensors
  • Ignition system
For fuel pump and fuel line and intake system information, refer to the relevant section of the workshop manual. For MAF sensor and APP sensor tests, refer to the relevant section of the workshop manual. Check for DTCs relating to HO2 sensors, refer to the DTC index. For ignition system tests, refer to the relevant section of the workshop manual.
Engine surges
  • Fuel pump
  • Fuel lines
  • MAF sensor
  • Harness
  • TP sensors
  • Throttle motor
  • Ignition system
For fuel pump and fuel line information, refer to the relevant section of the workshop manual. For MAF sensor and TP sensor tests, refer to the relevant section of the workshop manual. For throttle motor tests refer to the guided diagnostic routine on the approved diagnostic system. For ignition system tests, refer to the relevant section of the workshop manual.
Engine detonates/knocks
  • Fuel pump
  • Fuel lines
  • Fuel quality
  • Knock sensor (KS)/circuit malfunction
  • MAF sensor
  • HO2 sensors
  • Air leakage
  • BARO sensor malfunction (internal ECM fault)
For fuel pump and fuel line information, refer to the relevant section of the workshop manual. For FRP sensor, MAF sensor and knock sensor tests, refer to the relevant section of the workshop manual. Check for DTCs relating to HO2 sensors, refer to the DTC index. For intake system, refer to the relevant section of the workshop manual. Refer to the warranty policy and procedures manual if a module is suspect.
No throttle response
  • APP sensor malfunction
  • TP sensors
  • Throttle motor
For APP sensor and TP sensor tests, refer to the relevant section of the workshop manual. For throttle motor tests refer to the guided diagnostic routine on the approved diagnostic system.
Poor throttle response
  • APP sensor malfunction
  • TP sensors
  • ECT sensor
  • MAF sensor
  • Transmission malfunction
  • Traction control event
  • Air leakage
  • Breather system disconnected/restricted
For APP sensor, TP sensor, ECT sensor and MAF sensor tests, refer to the relevant section of the workshop manual. For transmission information, refer to the relevant section of the workshop manual. For intake system checks, refer to the relevant section of the workshop manual. For breather system checks, refer to the relevant section of the workshop manual.

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
P008700 Fuel rail/system pressure too low
  • Fuel rail pressure (FRP) sensor disconnected
  • FRP sensor to ECM sensing circuit short circuit to ground
  • FRP sensor supply circuit high resistance
  • FRP sensor failure
  • Fuel line leak
  • Restricted fuel line
  • Fuel pump module circuit high resistance
  • Fuel pump module circuit short circuit to ground
  • Fuel pump module failure
For FRP sensor tests, refer to the relevant workshop manual section. Check the fuel lines, check the fuel pressure and the fuel pump module circuits.
P008800 Fuel rail/system pressure too high
  • Fuel rail pressure (FRP) sensor to ECM wiring (supply/sense): short circuit to each other
  • FRP sensor to ECM sense circuit short circuit to power
  • FRP sensor failure
  • Fuel pressure control valve (FPCV) fault
  • Fuel pump module circuit short circuit to power
  • Fuel pump module failure
For FRP sensor tests, refer to the relevant workshop manual section. Check the fuel lines, check the fuel pressure and the fuel pump module circuits.
P017100 System Too Lean (Bank 1)
  • 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. 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, etc. Check the fuel system for leaks, DTCs, etc. Check the oil condition. 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. 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. Check for MAF sensor and evaporative emission DTCs.
P020100 Cylinder 1 Injector Circuit / Open
  • Injector disconnected
  • Injector harness wiring high resistance, short circuit to ground
  • Injector failure
For fuel system tests, refer to the relevant workshop manual section. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
P020200 Cylinder 2 Injector Circuit / Open
  • Injector disconnected
  • Injector harness wiring high resistance, short circuit to ground
  • Injector failure
For fuel system tests, refer to the relevant workshop manual section. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
P020300 Cylinder 3 Injector Circuit / Open
  • Injector disconnected
  • Injector harness wiring high resistance, short circuit to ground
  • Injector failure
For fuel system tests, refer to the relevant workshop manual section. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
P020400 Cylinder 4 Injector Circuit / Open
  • Injector disconnected
  • Injector harness wiring high resistance, short circuit to ground
  • Injector failure
For fuel system tests, refer to the relevant workshop manual section. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
P020500 Cylinder 5 Injector Circuit / Open
  • Injector disconnected
  • Injector harness wiring high resistance, short circuit to ground
  • Injector failure
For fuel system tests, refer to the relevant workshop manual section. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
P020600 Cylinder 6 Injector Circuit / Open
  • Injector disconnected
  • Injector harness wiring high resistance, short circuit to ground
  • Injector failure
For fuel system tests, refer to the relevant workshop manual section. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
P020700 Cylinder 7 Injector Circuit/Open
  • Injector disconnected
  • Injector harness wiring high resistance, short circuit to ground
  • Injector failure
For fuel system tests, refer to the relevant workshop manual section. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
P020800 Cylinder 8 Injector Circuit/Open
  • Injector disconnected
  • Injector harness wiring high resistance, short circuit to ground
  • Injector failure
For fuel system tests, refer to the relevant workshop manual section. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
P210129 Throttle Actuator A Control Motor Circuit Range/Performance
  • Jammed throttle blade, gearing or motor
Check for fuel charging DTCs and a message in the instrument cluster. Rectify as necessary. If the problem persists, renew the throttle body. Refer to the relevant workshop manual section.
P210164 Throttle Actuator A Control Motor Circuit Range/Performance
  • Jammed throttle blade, gearing or motor
Check for fuel charging DTCs and a message in the instrument cluster. Rectify as necessary. If the problem persists, renew the throttle body. Refer to the relevant workshop manual section.
P210329 Throttle Actuator A Control Motor Circuit High
  • Throttle Actuator control circuit short circuit to power
  • ECM fault
Check the electric throttle unit and circuits. Refer to the electrical guides. Clear the DTCs and test for normal operation. Refer to the guided diagnostic routine for this code on the approved diagnostic system. Refer to the warranty policy and procedure manual if an ECM is suspect.
P210364 Throttle Actuator A Control Motor Circuit High
  • Control circuit short circuit to power
  • ECM fault
Check the electric throttle unit and circuits. Refer to the electrical guides. Clear the DTCs and test for normal operation. Refer to the guided diagnostic routine for this code on the approved diagnostic system. Refer to the warranty policy and procedure manual if an ECM is suspect.
P210500 Throttle Motor Control System - Forced Engine Shutdown
  • Throttle MIL request due to fuel cut
Check for DTCs indicating the reason for the fuel cut. Follow the action indicated for those DTCs.
P210629 Throttle Actuator Control System - Forced Limited Power
  • Intended reduced availability fault (limp home)
Check for fuel charging DTCs and a message in the instrument cluster. Rectify as necessary. If the problem persists, renew the throttle body. Refer to the relevant workshop manual section.
P210664 Throttle Actuator Control System - Forced Limited Power
  • Intended reduced availability fault (limp home)
Check for fuel charging DTCs and a message in the instrument cluster. Rectify as necessary. If the problem persists, renew the throttle body. Refer to the relevant workshop manual section.
P211800 Throttle Actuator Control Motor Current Range/Performance
  • Throttle motor over current condition detected
  • ECM fault
Refer to the electrical guides and check the wiring between the ECM and throttle actuator. Refer to the guided diagnostic routine for this code on the approved diagnostic system. Refer to the warranty policy and procedures manual if an ECM is suspect.
P211900 Throttle Actuator Control Throttle Body Range/Performance
  • Throttle spring faulty
Check the throttle return spring on the throttle body. Repair/renew as necessary. Check for fuel charging DTCs and a message in the instrument cluster. Rectify as necessary. If the problem persists, renew the throttle body. Refer to the relevant workshop manual section.