P0008 Code – Engine Position System Performance Bank 1

The P0008 diagnostic trouble code (DTC) indicates that the engine control module (ECM) has detected a timing mismatch between the crankshaft and camshaft on Bank 1. This usually points to a problem with the engine's timing system, such as a stretched timing chain, worn timing components, or incorrect valve timing.

What Does P0008 Mean?

P0008 means the ECM has determined that the crankshaft and camshaft are no longer synchronized within the manufacturer's specified limits. This condition can negatively affect engine performance and, if ignored, may result in severe engine damage.

Symptoms of P0008

• Check Engine Light illuminated.
• Rough idle.
• Reduced engine power.
• Poor acceleration.
• Hard starting.
• Engine misfires.
• Rattling noise from the timing chain area.
• Decreased fuel economy.

Common Causes

• Stretched timing chain.
• Worn timing chain guides.
• Faulty timing chain tensioner.
• Incorrect camshaft timing.
• Worn crankshaft or camshaft timing gears.
• Improper engine repair or timing chain installation.
• Low engine oil level or poor oil maintenance.
• Faulty camshaft or crankshaft position sensor (less common).

How to Diagnose P0008

1. Scan for additional trouble codes.
2. Inspect the engine oil level and condition.
3. Check live data for camshaft and crankshaft synchronization.
4. Listen for timing chain noise during engine operation.
5. Inspect timing chain, guides, and tensioner.
6. Verify valve timing using manufacturer service procedures.

How to Fix P0008

• Replace a stretched timing chain.
• Replace worn chain guides and tensioner.
• Correct engine timing if it is out of specification.
• Repair or replace damaged timing gears.
• Change contaminated engine oil and filter.
• Replace faulty camshaft or crankshaft position sensors if necessary.

Can You Drive With P0008?

Driving with a P0008 code is not recommended. A timing system problem can lead to poor engine performance and may eventually cause internal engine damage, especially in interference engines where piston-to-valve contact is possible.

Repair Cost Estimate

Repair	Estimated Cost (USD)
Engine oil and filter service	$50–$120
Timing chain tensioner replacement	$250–$700
Complete timing chain kit replacement	$800–$2,500
Camshaft or crankshaft sensor replacement	$100–$400

Related Trouble Codes

• P0009 – Engine Position System Performance Bank 2
• P0016 – Crankshaft/Camshaft Position Correlation Bank 1 Sensor A
• P0017 – Crankshaft/Camshaft Position Correlation Bank 1 Sensor B
• P0018 – Crankshaft/Camshaft Position Correlation Bank 2 Sensor A
• P0019 – Crankshaft/Camshaft Position Correlation Bank 2 Sensor B

Frequently Asked Questions

What causes code P0008?

The most common cause is a stretched timing chain or worn timing components that cause the camshaft and crankshaft to become out of synchronization.

Can low oil cause P0008?

Low or dirty engine oil can accelerate timing chain and tensioner wear, contributing to this code.

Will clearing the code fix P0008?

No. Clearing the code only removes the warning temporarily. The underlying timing problem must be repaired to prevent the code from returning.

Conclusion

P0008 is a serious engine timing fault that should not be ignored. Early diagnosis and repair of the timing chain system can prevent expensive engine damage and restore proper engine performance and reliability.