dpfe sensor circuit high input. It's most likely a bad dpfe but just to be sure here's the steps for diagnosing it. hope it helps and let us know then.
1. Check voltage of the DPFE sensor at the sensor connection on the Brown/Light Green (BN/LG) wire. If the circuit is OK, the circuits voltage will match the reading seen on the scan tool. Normal voltage should be 0.5-1.2 volts Key On Engine Off (KOEO) or at idle.
2. If the voltage reading matches the value seen on the scan tool, check for 5.0 volts measured between the Brown/White (BN/WT) wire and the Grey/Red (GY/RD) wire.
3. If the circuits check as stated, either the sensor is defective, or the sensor has a connection problem.
4. If the voltage measured on the BN/LG wire is different from the value seen on the scan tool, check the BN/LG wire for an open circuit and service it as necessary.