P0018 — Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor A)
Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor A): the value does not correlate with the related sensor or expected pattern. This relates to engine timing; a fault can cause rough running, a no-start, or timing errors.
General code reference. Confirm the definition and diagnostic procedure for your vehicle's year, model and engine. A stored code alone does not identify a failed part.
Affected components
- Timing chain
- Camshaft position sensor
- Crankshaft position sensor
Possible causes to check
These are possible checks, not a ranked diagnosis. Follow the vehicle manufacturer's test procedure before replacing parts.
- Timing chain stretched (bank 2)
- Bank 2 cam phaser failed
Possible symptoms
- Check engine light on
- Power loss especially in mid-rpm range
- Possible rough idle or stalling
- Increased fuel consumption
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Related codes
Sources
Check each reference's vehicle and model-year scope. General background links do not establish which fault is most likely on your vehicle.
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.