Camshaft A Position Signal Output Circuit Low Bank 1
The buffered camshaft A position output that the engine controller sends to other modules (transmission, body, ignition module) is below the expected level on bank 1. Other modules cannot use the cam phase reference for synchronisation.
Affected components
- Control module
- Signal output buffer
- Wiring harness
Common causes
- High likelihood: Output wire shorted to ground
- Medium likelihood: Output buffer transistor failed
- Low likelihood: Connector pins corroded - high contact resistance
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
Related codes
Sources
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.