Exhaust Aftertreatment Fuel Pressure Sensor Circuit Range/Performance
Aftertreatment fuel-pressure sensor reads in range but plausibility fails — pressure does not rise during prime, drift across a regeneration.
Affected components
- Aftertreatment fuel pressure sensor
Common causes
- High likelihood: Sensor drift
- Low likelihood: Sensor element aged beyond calibration window
- Low likelihood: Sensor mounting loose - signal damping
Possible symptoms
- Check engine light on
- Hard start, no start, or stalling under load
- Power loss especially at high load or rpm
- Possible long cranking time
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.