DTC P0406: Exhaust Gas RECIRCULATION (EGR) Sensor A Circuit High
P0406 - EXHAUST GAS RECIRCULATION (EGR) SENSOR A CIRCUIT HIGH
| Description: | The EGR monitor checks the EGR sensor signal to the powertrain control module (PCM) for high voltage. The test fails when the average voltage to the PCM exceeds the maximum calibrated value. | ||
| Possible Causes: |
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| Diagnostic Aids: | A DPFEGR PID reading greater than 4.5 volts with the key ON, engine OFF or running indicates a hard fault. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| Vehicles with an EGR system module (ESM) | GO to Pinpoint Test HH . | ||
| All others | GO to Pinpoint Test HE . | ||