Q: Check Engine Light is on and OnStar says it is code P0008

asked by on

I just got back from a business trip last night. Tonight when I got in my car, my check engine light was on. OnStar says it is an "engine and transmission" issue with an error code 0008. After doing research online, I saw that it could be a timing chain issue, but I'm not sure since everything is closed for the weekend. I have another business trip tomorrow and need to know if it is safe to drive the car on this code.

Also, there is a SCA #11340C "recall" for 2007-2009 Cadillac CTS timing belts, but I've been told by Cadillac that my car does not have any special recalls on the VIN.

My car has 107535 miles.
My car has an automatic transmission.

Update: I checked the oil this morning and had to add 2 quarts. The light was still on after doing this so I disconnected the battery cable and this did not change the check engine light. OnStar said the code was P0008 and that it was an ignition problem that I should take care of at my convenience.

Hey there. This code is "generally" related to the timing chain and related components. This is usually due to engine mechanical problems, stretched timing chain or a failed camshaft actuator or actuator solenoid.

The Engine Control Module (ECM) monitors the position of both camshafts and the crankshaft. The ECM performs a test for misalignment between both camshafts on one bank of the engine and the crankshaft and calculates the position of both. The ECM compares the position of both the camshafts and the crankshaft with the learned value. The ECM will set the P0008 code if both learned values for one bank of the engine are exceeding a calibrated threshold in the same direction. It would be advised to have the car checked before taking it out on the road. A certified professional from YourMechanic can come to your car’s location to diagnose the code in person and assist with repairs.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Check Engine Light is on and OnStar says it is code P0008

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Q: Does it have struts or shocks?

Hi there. The 2006 Cadillac CTS has a front shock / strut assembly as opposed to the singular strut with coil over spring option that is common with passenger cars and some smaller SUV's. I would recommend having this service...

Q: Would it give me trouble in the future?

Hello. If the car is missing the timing chain, then it will not run. I would steer far far away from buying a vehicle that needs this kind of repair. YourMechanic is capable of replacing your timing chain. However, what...

Q: Engine light on and vehicle running poorly.

The symptoms your CTS is experiencing are symptoms I have seen often in prior Cadillacs. What I suspect is that your CTS is likely dealing with problems concerning the throttle body. The engine in your CTS is equipped with an...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...