PIP: Hesitation / Stall Engine RPO LAF LAP LAT LNF LE5 LE8 LE9

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Service Information
2009 Chevrolet Cobalt | Cobalt, G5 (VIN A) Service Manual | Preliminary Information | Document ID: 2321485
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#PIP4469E: DTC P0011 P0014 P0016 P0017 Setting Or Hesitation / Stall Engine RPO LAF LAP LAT LNF LE5 LE8 LE9 - (Jul 31, 2009)


Subject: DTC P0011, P0014, P0016, P0017 Setting or Hesitation/Stall Engine RPO LAF LAP LAT LNF LE5 LE8 LE9


Models: 2009 Chevrolet Cobalt

With RPO LAP 2.2L, LNF 2.0L

AND

2009 Chevrolet HHR

With RPO LNF 2.0L, LE8 2.2L, LE9 2.4L

AND

2009 Pontiac G5

With RPO LAP 2.2L

AND

2009 Chevrolet Malibu

2009 Pontiac G6

2009 Pontiac Solstice

2009 Saturn Sky

2009 Saturn Aura

2009 Saturn Vue

With RPO LE5 2.4L

AND

2009 Saturn AURA Hybrid

2009 Saturn VUE Hybrid

2009-2010 Chevrolet Malibu Hybrid

With RPO LAT 2.4L

AND

2010 Chevrolet Equinox

2010 GMC Terrain

With RPO LAF 2.4L SIDI




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This PI was superseded to add the 2009 2.4L LAT and the 2010 2.4L LAF/LAP also to add DTCs P0016/P0017 and hesitation/stall as keywords. Please discard PIP4469D.


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The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:
In rare instances a technician may comment that they find DTC's for cam phaser operation and or have noticed a hesitation/stumble typically on a PDI or with very low mileage. They may have followed eSI diagnostics and the dtc/condition has returned. They may have replaced the ECM with no change and/or they may find one or more of the DTCs listed below.

P0011-Intake Camshaft Position (CMP) System Performance

P0014-Exhaust Camshaft Position (CMP) System Performance

P0016-Crankshaft Position - Intake Camshaft Position Not Plausible

P0017-Crankshaft Position - Exhaust Camshaft Position Not Plausible

Recommendation/Instructions:
Engineering has determined that casting sand and or non-ferrous (aluminum) machining debris in the camshaft phasers/solenoid valves can cause a hesitation/stumble and or these DTCs to set intermittently. This condition/DTCs typically will set very early in the vehicle's life or at PDI. When the technician follows the eSI diagnostic chart for these codes they may be led to ECM replacement; however additional diagnostics should be made before replacement of any parts. After inspection of the solenoid valve and wiring per eSI confirms correct electrical operation, check for debris. The technician should inspect each CMP actuator solenoid valve assembly for torn screens or debris on the screens, then clean and replace as necessary. If the dtc continues to reset after thorough inspection and cleaning of the solenoid valves, replace the affected camshaft actuator(s) depending upon the dtc(s) that set.

Note: When debris is found change the oil and filter before returning to service, in some instances it may be necessary to change the oil/filter multiple times. The filter can be inspected afterwards to ensure no additional debris is present.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

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