P0406
Moderate
Powertrain
EGR Sensor A Circuit High
Common Causes
Short to voltage in EGR sensor circuit
Failed EGR sensor
PCM reference voltage fault
Common Symptoms
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Quick Info
| Code | P0406 |
| System | Powertrain |
| Severity | Moderate |
Disclaimer
This information is for diagnostic guidance only. Always verify repairs with a qualified technician before performing safety-critical work.
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