Service Information
Document ID: 2366514
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#PIP4729: Ecotec 2.0L / 2.4L (RPO LNF / LAF) Setting DTC P0016 P0017 After Timing Has Been Set - (Nov 4, 2009)


Subject: Ecotec 2.0L/2.4L (RPO LNF/LAF) Setting DTC P0016, P0017 After Timing Has Been Set


Models: 2010 Chevrolet Equinox

2010 GMC Terrain

With 2.4L Engine RPO LAF

2008-2010 Chevrolet Cobalt SS

2008-2010 Chevrolet HHR SS

2007-2009 Pontiac Solstice GXP

2007-2009 Saturn Sky Redline

With 2.0L Engine RPO LNF




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

Condition/Concern:
A technician may comment they have DTC P0016 or P0017 after resetting the timing after service. They may state that the engine is in time and all of the paint marks line up.

Recommendation/Instructions:
On Ecotec 4 cylinder engines (RPO LNF/LAF) with SIDI-Direct Injection the lower timing chain crank gear has a spacing washer installed in front of (and behind) the lower timing chain crank gear. This spacer/washer obscures/covers the correct timing mark. The outer spacer/washer is in between the crank/balancer pulley and the lower timing gear and may remain in place when the pulley is removed. The spacer/washer has a dot/mark on its surface that may be mistaken for the lower timing mark causing the tech to incorrectly time the engine. This may lead to cam correlation DTC's setting (such as P0016/P0017). Typically the technician will report he is sure the engine is in time. This outer spacer/washer must be removed when timing engine RPO LNF or LAF to view the correct timing mark on the lower crank gear. Additionally, EPC and eSI do not show the washer as present on the 2.0L SIDI engine RPO-LNF. (A change is in process)

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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Thank the Lord for this post. I've been chasing this problem for days and this was the fix. A paper thin washer that I wouldn't even know was there covering up the correct dot. Without removing this washer I was referencing the wrong dot on the crank sprocket.

 

Hmmm interesting I got the my valves done on my 07 2.2 and im getting that code p0016 wonder if maybe thats the problem the mechanic said it was on time but the computer doesnt lie although the article does say 08-2010 cobalt ss so idk