Engine Positions System Performance Bank 1
Code P0008 indicates that the Engine Control Module (ECM) has detected a correlation error between the crankshaft position sensor and the camshaft position sensor on Bank 1. This typically means the camshaft timing is off relative to the crankshaft, often due to a stretched timing chain, failed tensioner, or worn timing gears. The ECM monitors the relationship between the two sensors; if the signals are out of sync by more than a few degrees, it sets this code.
1. Most Common Causes
- Timing chain stretched or out of alignment
- Faulty timing chain tensioner or VVT system failure
- Worn or damaged crankshaft or camshaft reluctor ring teeth
- Defective or erratic crankshaft (CKP) or camshaft (CMP) position sensor
- Wiring or connector issues at CKP or CMP sensors
- ECM/PCM failure (less common)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine may run rough or misfire
- Reduced engine power and fuel economy
- Hard starting or no start condition
- Engine may stall
3. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect timing chain components for slack or damage.
Step 3: Use a scan tool to monitor camshaft and crankshaft position sensor data for correlation.
Step 4: Perform a mechanical timing check by aligning timing marks.
Step 5: Replace timing chain, tensioner, guides, and sensors as needed.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it is not safe. Driving with P0008 can cause severe engine damage, including valve and piston contact, leading to costly repairs. Have the vehicle towed to a repair shop.
How much does it cost to fix?▼
Repair costs typically range from $500 to $1500, depending on the vehicle and whether the timing chain, tensioner, guides, or sensors need replacement. Labor is the main expense.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.