:  Dec 21, 2007



Overview

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

Inspection and Verification

. Verify the customer concern.

. Visually inspect for obvious signs of damage.

Mechanical Electrical
  • Hoses and ducts (damage/connections)
  • Air cleaner element (contaminated/blocked)
  • Restricted air intake
  • Supercharger
  • Supercharger (cooling fan) drive belt
  • Supercharger seals and gaskets
  • Charge air coolers (damage/connection)
  • Mass air flow (MAF) sensor
  • Manifold absolute pressure (MAP) sensor
  • Manifold absolute pressure/temperature (MAPT) sensor
  • Throttle body
  • Harness (security/damage)
  • Connections (security/damage)

. 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 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
Vehicle does not start/hard starting/poor performance
  • Restricted/Blocked air intake
  • Restricted/Blocked air cleaner element
Clear the restriction. Replace the air cleaner element as necessary. Refer to the relevant workshop manual section.
Excessive intake noise
  • Intake pipe disconnected/damaged after the air cleaner
  • Air cleaner assembly incorrectly assembled/damaged
Check the intake system and hoses for correct installation/damage. Refer to the relevant workshop manual section.
Lack of boost
  • Supercharger drive belt broken/slipping
  • Supercharger fault
  • supercharger air intake fault
  • Major air leakage (after the supercharger)
Check the supercharger and drive belt. Check the charge air coolers. Refer to the relevant workshop manual section.
Noise
  • Supercharger drive belt slipping
  • Supercharger fault
  • Major air leakage (after the supercharger)
Check the supercharger and drive belt. Remove the supercharger drive belt and recheck for noise. Turn the supercharger by hand and check for excessive resistance. Check for excessive play at the supercharger pulley. Check the charge air coolers. Refer to the relevant workshop manual section.

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
P010100 Mass or Volume Air Flow A Circuit
  • Blocked air cleaner
  • Air intake leak
  • Engine breather leak
  • Mass air flow (MAF) sensor sensing circuit high resistance, intermittent short circuit to ground
  • MAF sensor supply circuit high resistance
Check the air cleaner for blockage, etc. Check the air intake system for leaks. Check the engine breather system. Refer to the relevant workshop manual section. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
P010600 Manifold Absolute Pressure/BARO Sensor Range/Performance
  • Intake manifold air leak (loose or missing component)
  • MAP sensor circuit(s) fault
  • MAP sensor failure
Check the intake manifold for security, etc. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
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.
P050600 Idle Air Control System RPM Lower Than Expected
  • Air intake restriction
  • Accessory drive overload (defective/seized component)
Check the air intake system. Check the accessory drive belt and components. Refer to the relevant workshop manual section.
P050700 Idle Air Control System RPM Higher Than Expected
  • Intake air leak between the mass air flow (MAF) sensor and throttle
  • Intake air leak between throttle and engine
  • Engine crankcase breather leak
Check the air intake system. Check the engine breather system. Refer to the relevant workshop manual section.
P066100 Intake Manifold Tuning Valve Control Circuit Low - Bank 1
  • Variable intake system tuning valve control circuit short to ground
  • Intake tuning valve fault
Check the intake tuning valve and circuits. Refer to the electrical guides. If no fault is found in the circuits, install a new intake tuning valve. Clear the DTCs and test for normal operation.
P066200 Intake Manifold Tuning Valve Control Circuit High - Bank 1
  • Variable intake system tuning valve control circuit short to power
  • Intake tuning valve fault
Check the intake tuning valve and circuits. Refer to the electrical guides. If no fault is found in the circuits, install a new intake tuning valve. Clear the DTCs and test for normal operation.
P207000 Intake Manifold Tuning Valve Control Stuck Open Bank 1
  • Variable intake system tuning valve control circuit short to power
  • Intake tuning valve fault
Check the intake tuning valve and circuits. Refer to the electrical guides. If no fault is found in the circuits, install a new intake tuning valve. Clear the DTCs and test for normal operation.
P207100 Intake Manifold Tuning Valve Control Stuck Open Bank 2
  • Variable intake system tuning valve control circuit short to power
  • Intake tuning valve fault
Check the intake tuning valve and circuits. Refer to the electrical guides. If no fault is found in the circuits, install a new intake tuning valve. Clear the DTCs and test for normal operation.