P0312

Symptoms

• The engine hesitates or runs unevenly
• Power Loss
• Increased fuel consumption
• Check Engine Light Is On
• Engine vibration

Causes

• Spark plug fault
• Problems with the ignition coil
• Dirty or faulty fuel injectors
• Low cylinder compression
• Problems with the fuel system (lean or rich mixture)
• Crankshaft position (CKP) sensor malfunction
• Damaged wiring harness or contacts

How to Fix

1. Check the condition of the spark plug in cylinder 12
2. Check the ignition coil and its connections
3. Check the fuel injector for contamination or malfunction
4. Measure the compression in the cylinder
5. Check the fuel system for leaks or blockages
6. Check the CKP sensor and its wiring harness
7. Clear the error and test drive to confirm the problem is resolved

Related codes

Error P0312 by Vehicle Brand