P0486
PowertrainEgr Systemmoderate severityEGR Sensor B Circuit
What P0486 Means
The PCM has detected a fault in the EGR sensor B circuit. Incorrect EGR feedback can affect emissions and engine performance.
Symptoms
- Check engine light on
- Rough idle
- Increased emissions
Common Causes
- Faulty EGR position sensor
- Damaged wiring or connector
- Carbon-clogged EGR valve
- Faulty PCM
Diagnostic Steps
- Scan for stored codes
- Inspect EGR sensor wiring
- Test EGR sensor signal
- Check EGR valve operation
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