Pontiac G8 Problem Report
Pontiac G8 The Check Engine Light With Code: P0011, P0014, P0021, P0024, P0341, P0346, P0336, and/or P0391
Vehicles with certain V6 engines may illuminate the Check Engine Light one or more of the following codes: P0011, P0014, P0021, P0024, P0341, P0346, P0336, or P0391. Our technicians tell us that some vehicles may require a powertrain control module (PCM) software update to correct this issue. Other vehicles may have excess camshaft end play on one or both cylinder heads which will need to be corrected using special procedures outlined by GM.
check engine light came on. code p0021 shows. car still run great so hope its an easy fix. - Visitor
Engine Light came on, had diagnostics checked with code coming up p0021 - Visitor
The check engine light comes on, followed by the reduced power indicator. I've already had it at the dealer once, and it's there again right now. I don't know what they'll do this time. The first time it was a computer problem. - Visitor
In the past 2 years this code always shows up when I take the car to the dealer. About a year a...
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