Diagnostic Trouble Code
P0008
Engine Positions System Performance Bank 1
Technical Description P0008
Engine Positions System Performance Bank 1
What Does This Mean P0008?
This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles, including but not limited to Cadillac, GMC, Chevrolet, etc.
Although generic, the specific repair steps may vary depending on make/model.
This source has a good description of this P0008 code:
The code is more common in the following makes: Suzuki, GM, Cadillac, Buick, Holden. In fact, there are service bulletins for certain GM vehicles and the fix is to replace timing chains (including such engines as 3.6 LY7, 3.6 LLT or 2.8 LP1). You may also see this DTC in a vehicle that also has other related DTCs such as P0009, P0016, P0017, P0018, and P0019. Bank 1 refers to the side of the engine that contains cylinder #1.
Although generic, the specific repair steps may vary depending on make/model.
This source has a good description of this P0008 code:
The code is more common in the following makes: Suzuki, GM, Cadillac, Buick, Holden. In fact, there are service bulletins for certain GM vehicles and the fix is to replace timing chains (including such engines as 3.6 LY7, 3.6 LLT or 2.8 LP1). You may also see this DTC in a vehicle that also has other related DTCs such as P0009, P0016, P0017, P0018, and P0019. Bank 1 refers to the side of the engine that contains cylinder #1.
Symptoms P0008
1
MIL (Malfunction indicator lamp) illumination
2
Roughness while accelerating
3
Poor fuel economy
4
Decreased power
5
Timing chain "noise"
Possible Causes P0008
1
Stretched timing chain
2
Crankshaft reluctor wheel has moved and is no longer referenced to top dead center (TDC)
3
Timing chain tensioner problem
Solutions & Repair Steps P0008
If your vehicle is new enough that it still has powertrain warranty left, by all means let the dealer perform the fix. Generally, diagnosing and fixing this DTC will involve inspecting the timing chains and tensioners for excessive wear or misalignment, and inspecting the crank reluctor wheel for proper positioning. Then replacing parts as required. As said earlier, there are known issues with some GM engines so there may be updated or revised replacement parts. Please consult a factory service manual for more vehicle make & model specific troubleshooting steps.
Related Codes
P0009
Engine Positions System Performance Bank 2
P0016
Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)
P0017
Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor B)
P0018
Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor A)
P0019
Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor B)