P0487
PowertrainEgr Systemmoderate severityEGR Throttle Position Control Circuit
What P0487 Means
The PCM has detected a fault in the EGR throttle position control circuit. This can affect exhaust gas recirculation and emissions control.
Symptoms
- Check engine light on
- Rough idle
- Poor engine performance
Common Causes
- Faulty EGR throttle actuator
- Damaged wiring or connector
- Carbon buildup in EGR system
- Faulty PCM
Diagnostic Steps
- Scan for stored codes
- Inspect EGR throttle wiring
- Test EGR throttle actuator
- Check for carbon buildup
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