EGR Sensor B Circuit Low
The signal from EGR position or pressure sensor B is below the lower diagnostic threshold. Indicates a short to ground, open signal wire or sensor fault.
Affected components
- Egr position sensor
- Egr pressure sensor
- Sensor wiring
Common causes
- High likelihood: EGR sensor B internally faulty
- Medium likelihood: Signal wire shorted to ground
- Low likelihood: Connector corroded
Possible symptoms
- Check engine light on
- Pinging or knocking under load
- Power loss and hesitation
- Possible rough idle
- Failed emissions inspection (NOx)
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.