What does the P0008 fault code mean?
The P0008 fault code applies to all car manufacturers and means “Engine Position System Performance (Bank 1)“.
Background Information: The crankshaft converts the up-and-down motion of the pistons into rotational motion. The camshaft controls the opening and closing of the valves. The Engine Position System uses signals from the crankshaft position sensor and camshaft position sensor to generate an angle counter. This angle counter is then synchronized with the crankshaft wheel angle to provide the engine’s current position. This fault code appears if the Electronic Control Unit (ECU) detects that the two camshafts in Line 1 are not aligned with the crankshaft for a certain period of time.
Symptoms of P0008 Error Code
The following are the main signs that may indicate the presence of error P0008:
- Engine indicator light on the dashboard
- Engine starting problems
- Floating or unstable idle
- Reduced engine power
- Increased fuel consumption
- Uneven engine performance, especially during acceleration
Important! If the error is related to a stretched timing chain, it can cause serious damage to the engine. If P0008 occurs, diagnosis should be performed immediately.
Main Causes of P0008 Error Code
- Timing chain stretching or wear
- Camshaft or crankshaft position sensor malfunction
- VVT phase shifter problem
- Improper timing chain replacement
- Mechanical wear of the chain guides or tensioner
- Contaminated oil or delayed oil change
P0008 Error Codes in Different Vehicles
- P0008 in Cadillac CTS: This error is common in the 3.6-liter engine. The main cause is usually a stretched timing chain.
- P0008 in GMC Arcadia: In these models, this condition is caused by a problem with the phase shifter. Replacing the timing kit usually helps.
- P0008 in Suzuki XL7: It typically appears after 100,000 kilometers. The main problem is wear on the timing chain and tensioner.
- P0008 in Holden Commodore: Usually related to improper chain installation or maintenance errors.
- P0008 in Chevrolet Traverse: Primarily occurs at high mileage due to mechanical wear of timing components.
How to diagnose P0008 error code?
Step 1: Read the error code using an OBD2 scanner.
Step 2: Check the error history and current engine parameters.
Step 3: Visually inspect the timing chain, tensioner, and guides.
Step 4: Check the VVT system, including solenoids and hydraulic pressure.
Step 5: Compare the actual and expected shaft positions.
| Possible causes | How to check？ |
|---|---|
| Timing chain tension or wear | Visual inspection, check timing marks |
| Camshaft position sensor malfunction | Diagnose with a scanner, check the signal with an oscilloscope |
| VVT system malfunction | VVT solenoid valve and oil pressure test |
| Circuit violation | Compare the current shaft position with the reference |
| Contaminated or old engine oil | Check oil condition and level |
Required tools: OBD2 scanner, oscilloscope (for detecting sensor signals), mechanical tools for timing access, oil pressure gauge
How to resolve P0008 error code? (Solutions to the Problem)
Simple Troubleshooting
- Reset the error if it’s unexpected.
- Change the engine oil and oil filter, especially if the oil is dirty.
- Check and clean the VVT solenoid valve.
- Check the electrical connections of the sensors.
In-depth Diagnostic and Repair Solutions
- Replace a stretched or worn timing chain.
- Adjust the timing phase using markings.
- Replace the faulty phase shifter or VVT solenoid valve.
- Replace the faulty camshaft or crankshaft position sensor.
- System calibration after repair.
Troubleshooting Through Symptoms
| Symptoms | Possible Solutions |
|---|---|
| Floating RPM | Check the VVT system, clean the solenoid valve |
| Difficulty starting | Check the timing sensor and timing |
| Power Reduction | Replace the timing chain, diagnose the phase shifter |
| Check the engine | Read the codes and eliminate the root cause |
P0008 Error FAQs
Can I drive a car with error code P0008?
Not recommended. Error P0008 indicates timing misalignment, which may lead to serious engine failure during subsequent operation.
Can I resolve error P0008 myself?
If the cause is contaminated engine oil or a faulty VVT solenoid valve, you can try to repair it yourself. However, if timing chain stretching occurs, professional repair is required.
Is a P0008 error harmful to the engine?
Yes. Camshaft and crankshaft phase mismatch can cause ignition failure and potentially damage valves or pistons.
Will the P0008 error reappear after resetting?
Yes, the error may reappear after a short period of vehicle operation if the root cause of the problem is not eliminated.
How soon should I fix the P0008 error?
The sooner the better. Delaying repair increases the risk of serious engine damage and expensive repairs.
Tip: Other fault codes related to engine position system performance include: P0009.