EGR Temperature Sensor A Circuit
A general electrical fault on EGR temperature sensor A — open, shorted, or out of plausibility. The sensor monitors recirculated exhaust gas temperature for EGR cooler protection and dosing.
Affected components
- Egr temperature sensor
- Egr cooler
Common causes
- High likelihood: Sensor failed
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.