:  Dec 17, 2007



Overview

For additional information on the operation of intake air distribution and filtering, refer to the relevant workshop manual section.

Inspection and verification

. Verify the customer concern.

. Visually inspect for obvious mechanical or electrical faults.

Mechanical Electrical
  • Hoses and ducts condition and installation
  • Air cleaner element condition and installation
  • Restricted air intake
  • Vacuum hoses condition and installation
  • Pipework to turbocharger condition and installation
  • Turbocharger condition and installation
  • Charge air coolers
  • Fuse(s)
  • Wiring harness
  • Loose or corroded electrical connector(s)
  • Mass air flow (MAF) sensor
  • Air charge temperature (ACT) sensor
  • Manifold absolute pressure (MAP) sensor
  • Intake air temperature (IAT) sensor
  • Intake air shut-off throttle solenoid

. 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
Vehicle does not start/hard starting
  • Restricted/Blocked air intake
  • Restricted/Blocked air cleaner element
Clear the restriction. Replace the air cleaner element as necessary.
Poor performance
  • Turbocharger fault
  • Throttle body fault
  • Intercooler hoses
Check the turbocharger. Check the intake air shutoff throttle function (make sure the throttle body returns to the open position). Check the intercooler hoses.
Excessive intake noise
  • Intake air leak after the turbocharger
  • Intake pipe disconnected/damaged after the air cleaner
  • Air cleaner assembly incorrectly assembled/damaged
Check the joint between the air intake elbow and the intake air shutoff throttle. Check the joints between the throttle body outlets and the intake manifolds. Check the charge air cooler seals. Check the intake system and hoses for correct installation/damage.

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
P009700 Intake Air Temperature Sensor 2 Circuit Low (Bank 1)
  • Air charge temperature (ACT) sensor circuit high resistance
  • ACT sensor circuit short circuit to ground
  • ACT sensor failure
Refer to the electrical guides. and check the ACT sensor and circuits.
P009800 Intake Air Temperature Sensor 2 Circuit High (Bank 1)
  • Air charge temperature (ACT) sensor circuit short circuit to power
  • ACT sensor failure
Refer to the electrical guides. and check the ACT sensor and circuits.
P009900 Intake Air Temperature Sensor 2 Circuit Intermittent/Erratic (Bank 1)
  • Air charge temperature (ACT) sensor circuit high resistance
  • ACT sensor circuit short circuit to ground
  • ACT sensor circuit short circuit to power
  • ACT sensor failure
Refer to the electrical guides. and check the ACT sensor and circuits.
P010000 Mass or Volume Air Flow A Circuit
  • Mass air flow (MAF) sensor circuit high resistance
  • MAF sensor circuit short circuit to ground
  • MAF sensor circuit short circuit to power
  • MAF sensor failure
Refer to the electrical guides and check the MAF sensor and circuits. Clear the DTCs and test for normal operation. If the problem persists, renew the MAF sensor.
P010400 Mass or Volume Air Flow A Circuit Intermittent/Erratic
  • Air leakage
  • Mass air flow (MAF) sensor circuit high resistance
  • MAF sensor circuit short circuit to ground
  • MAF sensor circuit short circuit to power
  • MAF sensor failure
Refer to the electrical guides and check the MAF sensor and circuits. Clear the DTCs and test for normal operation. If the problem persists, renew the MAF sensor.
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.
P010700 Manifold Absolute Pressure/BARO Sensor Low
  • Manifold absolute pressure (MAP) sensor circuit high resistance
  • MAP sensor circuit short circuit to ground
  • MAP sensor failure
Check the MAP sensor and circuits. Refer to the electrical guides. Refer to the warranty policy and procedures manual if a module is suspect.
P010800 Manifold Absolute Pressure/BARO Sensor High
  • Manifold absolute pressure (MAP) sensor circuit short circuit to power
  • MAP sensor failure
Check the MAP sensor and circuits. Refer to the electrical guides. Refer to the warranty policy and procedures manual if a module is suspect.
P010900 Manifold Absolute Pressure/BARO Sensor Intermittent
  • Manifold absolute pressure (MAP) sensor circuit high resistance
  • MAP sensor circuit short circuit to ground
  • MAP sensor circuit short circuit to power
  • MAP sensor failure
Check the MAP sensor and circuits. Refer to the electrical guides. Refer to the warranty policy and procedures manual if a module is suspect.
P010A00 Mass or Volume Air Flow B Circuit
  • Mass air flow (MAF) sensor circuit high resistance
  • MAF sensor circuit short circuit to ground
  • MAF sensor circuit short circuit to power
  • MAF sensor failure
Check the MAF sensor and circuits. Refer to the electrical guides. Refer to the warranty policy and procedures manual if a module is suspect.
P010E00 Mass or Volume Air Flow B Circuit Intermittent/Erratic
  • Air leakage
  • Mass air flow (MAF) sensor circuit high resistance
  • MAF sensor circuit short circuit to ground
  • MAF sensor circuit short circuit to power
  • MAF sensor failure
Refer to the relevant workshop manual section. Check the MAF sensor and circuits. Refer to the electrical guides. Refer to the warranty policy and procedures manual if a module is suspect.
P010F00 Mass or Volume Air Flow Sensor A/B Correlation
  • Air leakage (post turbocharger)
  • Mass air flow (MAF) sensor circuit high resistance
  • MAF sensor circuit short circuit to ground
  • MAF sensor circuit short circuit to power
  • MAF sensor failure
  • VGT actuator circuit high resistance
  • VGT actuator circuit short circuit to ground
  • VGT actuator circuit short circuit to power
  • VGT actuator failure
Refer to the relevant workshop manual section. Check the MAF sensor and circuits. Refer to the electrical guides. For VGT actuator circuit tests, refer to the relevant workshop manual section. Refer to the warranty policy and procedures manual if a module is suspect.
P011200 Intake Air Temperature Sensor 1 Circuit Low (Bank 1)
  • Intake air temperature (IAT) sensor circuit high resistance
  • IAT sensor circuit short circuit to ground
  • IAT sensor failure
Check the IAT sensor and circuits. Refer to the electrical guides. Measure the resistance of the IAT sensor (pins 2 and 3 of the MAF sensor). Nominal resistance at 20°C (68°F) should be 2.5 Kohms. If the values are outside this range, install a new MAF sensor. Refer to the relevant section of the workshop manual. Clear the DTCs and test for normal operation.
P011300 Intake Air Temperature Sensor 1 Circuit High (Bank 1)
  • Intake air temperature (IAT) sensor circuit short circuit to power
  • IAT sensor failure
Check the IAT sensor and circuits. Refer to the electrical guides. Measure the resistance of the IAT sensor (pins 2 and 3 of the MAF sensor). Nominal resistance at 20°C (68°F) should be 2.5 Kohms. If the values are outside this range, install a new MAF sensor. Refer to the relevant section of the workshop manual. Clear the DTCs and test for normal operation.
P011400 Intake Air Temperature Sensor 1 Intermittent/Erratic (Bank 1)
  • Intake air temperature (IAT) sensor circuit high resistance
  • IAT sensor circuit short circuit to ground
  • IAT sensor circuit short circuit to power
  • IAT sensor failure
Check the IAT sensor and circuits. Refer to the electrical guides. Measure the resistance of the IAT sensor (pins 2 and 3 of the MAF sensor). Nominal resistance at 20°C (68°F) should be 2.5 Kohms. If the values are outside this range, install a new MAF sensor. Refer to the relevant section of the workshop manual. Clear the DTCs and test for normal operation.
P023400 Turbocharger/Supercharger A Overboost Condition
  • Air leakage
  • Manifold absolute pressure (MAP) sensor circuit high resistance
  • MAP sensor circuit short circuit to ground
  • MAP sensor circuit short circuit to power
  • MAP sensor failure
  • Exhaust gas recirculation (EGR) fault
  • VGT actuator fault
Refer to the relevant workshop manual section. Check the MAP sensor and circuits. Refer to the electrical guides. For EGR valve tests, refer to the relevant workshop manual section. Check for DTCs indicating EGR or VGT actuator faults. Refer to the warranty policy and procedures manual if a module is suspect.
P029900 Turbocharger/Supercharger A Underboost Condition
  • Air leakage, post turbocharger
  • Manifold absolute pressure (MAP) sensor circuit high resistance
  • MAP sensor circuit short circuit to ground
  • MAP sensor circuit short circuit to power
  • MAP sensor failure
  • Exhaust gas recirculation (EGR) fault
  • VGT actuator fault
Check for a post turbocharger air leak, for additional information, refer to the relevant workshop manual section. Check the MAP sensor and circuits. Refer to the electrical guides. For EGR valve tests, refer to the relevant workshop manual section. Check for DTCs indicating EGR or VGT actuator faults. Refer to the warranty policy and procedures manual if a module is suspect.
P200800 Intake Manifold Runner Control Circuit / Open (Bank 1)
  • Port de-activation solenoid circuit high resistance
  • Port de-activation solenoid circuit short circuit to ground
  • Port de-activation solenoid failure
Check the port deactivation valve and circuits. Refer to the electrical guides. If no fault is found in the circuits, install a new valve. Clear the DTCs and test for normal operation.
P200900 Intake Manifold Runner Control Circuit Low (Bank 1)
  • Port de-activation solenoid circuit high resistance
  • Port de-activation solenoid circuit short circuit to ground
  • Port de-activation solenoid failure
Check the port deactivation valve and circuits. Refer to the electrical guides. If no fault is found in the circuits, install a new valve. Clear the DTCs and test for normal operation.
P201000 Intake Manifold Runner Control Circuit High (Bank 1)
  • Port de-activation solenoid circuit short circuit to power
  • Port de-activation solenoid failure
Check the port deactivation valve and circuits. Refer to the electrical guides. If no fault is found in the circuits, install a new valve. Clear the DTCs and test for normal operation.
P219900 Intake Air Temperature ½ Correlation
  • Intake air temperature (IAT) sensor circuit high resistance, short circuit to ground, short circuit to power
  • Air charge temperature (ACT) sensor circuit high resistance, short circuit to ground, short circuit to power
  • IAT sensor failure
  • ACT sensor failure
  • ECM failure
Check the IAT sensor and circuits. Refer to the electrical guides. For ACT sensor, refer to the relevant workshop manual section. Refer to the warranty policy and procedures manual if a module is suspect.