PI0031B: MIL/Check Engine Light On, DTC P0341 Or P0366 Set After Camshaft Sensor Replacement - (Jan 11, 2012)

Document ID: 2752019 Page 1 of 3

Document ID: 2752019

#PI0031B: MIL/Check Engine Light On, DTC P0341 or P0366 Set After Camshaft Sensor Replacement - (Jan 11, 2012)

MIL/Check Engine Light On, DTC P0341 or P0366 Set After Camshaft Subject: Sensor Replacement

Models: 2009-2011 Chevrolet Aveo Equipped with 1.6L Engine (RPO LXV) 2011-2012 Chevrolet Cruze 2012 Chevrolet Sonic Equipped with 1.8L Engine (RPO LUW) 2009-2010 Pontiac G3 Wave Equipped with 1.6L Engine (RPO LXV) 2008-2009 Saturn Astra Equipped with 1.8L Engine (RPO 2H0)

This PI is being revised to add the Cruze and Sonic models. Please discard PI0031A.

Condition/Concern

Some customers may comment that the check engine light is illuminated. Upon inspection, a technician may find DTC P0341 or P0366 resets after following diagnostics and replacement of the camshaft sensor.

This may be caused by excessive clearance between the camshaft sensor and the camshaft reluctor ring as a result of the reluctor ring being pressed on the camshaft too far.

Recommendation/Instructions

http://gsi.xw.gm.com/newsi/showDoc.do?docSyskey=2752019&from=nb 2/ 2/ 2012 Document ID: 2752019 Page 2 of 3

1. Remove the camshaft cover.

Note: You may need to rotate the engine so the camshaft reluctor ring is in a good position to the camshaft sensor to determine the air gap. 2. Locate the camshaft sensor and the camshaft reluctor ring air gap.

3. Using a pry bar, carefully force the camshaft towards the passenger side of the vehicle. Only pry in the location shown in the graphic above.

http://gsi.xw.gm.com/newsi/showDoc.do?docSyskey=2752019&from=nb 2/ 2/ 2012 Document ID: 2752019 Page 3 of 3

4. Use a feeler gauge to determine the clearance between the reluctor ring and the camshaft sensor. The gap is approximately 0.8 to 0.9 mm (0.030 to 0.035 in) (maximum gap = 1.5 mm [0.059 in]). If the gap is close to the maximum limit, inspect each of the four cam segments. If the gap exceeds the 1.5 mm (0.059 in) limit, replace that camshaft. If the reluctor ring is pressed on too far, the affected camshaft will have a noticeable wider gap between the face of the reluctor ring and the camshaft sensor. Measure both the air gap between the camshaft sensor and the camshaft reluctor ring. Compare the air gap of the two camshaft and then replace the camshaft if air gap is out of specification. 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 WE SUPPORT proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how VOLUNTARY to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or TECHNICIAN that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information. CERTIFICATION

http://gsi.xw.gm.com/newsi/showDoc.do?docSyskey=2752019&from=nb 2/ 2/ 2012