Crankshaft/Camshaft Position Correlation Bank 2 Sensor A
The Engine Control Module (ECM) detected that the timing alignment between the crankshaft and the camshaft on Bank 2 (Sensor A/intake) is out of specification. This indicates that the camshaft is advanced or retarded relative to the crankshaft's expected position during the engine cycle.
Driving with a severe timing issue can lead to internal engine damage, especially in interference engines. It should be diagnosed and repaired immediately to prevent catastrophic failure or stalling in traffic.
Common symptoms
- Illuminated Check Engine Light
- Rough idle or engine stalling
- Reduced engine power and poor acceleration
- Hard starting or extended cranking time
- Decreased fuel economy
Likely causes
- Stretched timing chain or worn timing belt
- Faulty or stuck variable valve timing (VVT) solenoid/actuator on Bank 2
- Low engine oil level or dirty, degraded oil
- Defective camshaft position sensor or crankshaft position sensor
- Damaged or worn timing chain tensioners and guides
- Wiring or connector issues in the cam/crank sensor circuits
What to check before replacing parts
Check the engine oil level and condition.
Look for: Low oil levels or excessively dirty oil can prevent the VVT system from operating correctly, leading to timing correlation codes.
Scan for related VVT or sensor codes and monitor live data.
Look for: Look at the cam/crank sync status and VVT advance/retard angles in the scan tool to see if Bank 2 is actively out of phase.
Inspect the wiring and connectors for the Bank 2 camshaft sensor and the crankshaft sensor.
Look for: Check for frayed wires, loose connections, or oil intrusion in the connectors that could distort the sensor signals.
Test the Bank 2 VVT solenoid (oil control valve) operation.
Look for: Remove and inspect the solenoid for sludge or debris, and apply power/ground to ensure it clicks and moves freely without binding.
Perform a mechanical timing inspection.
Look for: Remove the timing cover or valve cover to check the timing marks, chain tension, and guides for physical wear, slack, or jumped teeth.
This page explains the generic P0018 definition and is general reference information, not a diagnosis for your specific vehicle. Actual causes, severity, and repairs vary by make, model, engine, and mileage — always confirm with a scan tool and a qualified technician before replacing parts.
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