Exhaust Pressure Control Valve B Range or Performance
Same as P049F with feedback in plausible range yet not matching the engine model - actuator slow, slipping or position sensor offset.
Affected components
- Exhaust pressure valve b
- Exhaust pressure actuator b
Common causes
- High likelihood: Actuator slow due to soot
- Medium likelihood: Gearing slipping
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.