EGR Slow Response
The EGR system reacts to commanded changes more slowly than calibrated - typically a partly clogged EGR cooler, sticky valve, or worn actuator.
Affected components
- Egr valve a
- Egr cooler a
Common causes
- High likelihood: EGR valve or cooler sticky
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
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.