Exhaust Pressure Control Valve B Position Sensor Circuit
A circuit fault is detected on the position sensor of exhaust pressure control valve B. Without valid position feedback the ECU cannot run closed-loop control of the valve and falls back to a default substitute.
Affected components
- Exhaust pressure position sensor b
Common causes
- High likelihood: Open in sensor signal, supply or ground
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
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.