Car Problem Reports

Cadillac CTS The Check Engine Light With Code: P0011, P0014, P0021, P0024, P0341, P0346, P0336, and/or P0391

Cadillac CTS Problem
16 Reports
Me Too

Model Years Affected: 2003, 2004, 2006, 2007, 2008, 2009, 2010

Average Mileage: 98,038 mi (48,000 mi - 195,000 mi)


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.

  •  Enthusiast

    check engine light came on three times since 48000 miles, since I purchased this car,replaced sensor to gas tank for pressure, still came on, repaired wire to sensor, still came on, this time it said fuel leak, no fuel leak! they reset the light, a week later it came on again, it just so came on the same day I got a notice from On Star that my OnStar was not on. I chose not to use Onstar! Something Fishy here, Can Onstar make this check engine light come on When they want to. I give up! the engine check light is still on and the car runs fine.

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  • Visitor, , 48,000 mi

    vehicle runs rough and misfires [timing issue] and loss pf power also excessive spark knock !! code p0021 told the dealer would like to shim i say no way cam controls major functions if there has been excessive play for any period of time the motor has already been damaged !!!

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  • Visitor, , 146,000 mi

    Check engine light, car not reaching temp, thermostat stuck in open position, replaced thermostat, corrected.

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  • Visitor, , 195,000 mi

    Engine misfires and noisy

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  • Visitor, , 113,000 mi

    Engine is running rough. It feels like it wants to stall at stops but so far has not. The code is P0024

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  • My '04 Cadillac began with my converters getting clogged up sent more then 1000 to get repaired when my transmission gave out. Had to replace that as well with more then 1000$. Replace spark plus gas filter air filter flywheel & now I have to replace my throttle body too! But my reduce engine power & service engine soon light comes on what can it be?

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  • Visitor, , 100,000 mi

    getting code p0336

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  • The Check engine light is on and the automatic start does not work.

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