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P2178 Diagnostic Trouble Code Discussion for September 2009

Fuel System Too Rich At Off Idle

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Trouble Ticket Help Requests for DTC P2178
Help Request Posted
2005 Pontiac GTO 6.0L Poor Idle Quality, Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 6G2VX12U85
P2178: Throttle acutator Idle position not learned. Has this problem intermittently, CEL comes on, Safety Mode reduced performance displays in the DIM. Let the car sit off, remove the key, wait 5 sec and runs fine till it does it again. The problem is very intermittent. Any thoughts?? This is for a friend of mi...
September 01, 2009