Exhaust Pressure Control Valve B Intermittent
Same as P049F with intermittent or erratic feedback - typically a connector or harness fault.
Affected components
- Exhaust pressure valve b
- Exhaust pressure wiring b
Common causes
- High likelihood: Intermittent contact at connector or terminal
- Low likelihood: Connector with intermittent contact under vibration
- Low likelihood: Harness routed against vibrating component
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
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.