Symptoms:

1. Lack of power to the engine
2. Seeing the check engine light come on
3. A manual regeneration is unable to perform
4. A crank-no start (if a regeneration isn’t able to perform)

Causes:

1. The exhaust back pressure sensor is no longer working correctly
2. Exhaust back pressure sensor is suffering from a poor electrical connection
3. The exhaust back pressure sensor harness is shorted or open
4. There is an open in signal circuit occurring between the PCM and exhaust pressure sensor
5. Short of power to ground in the signal circuit to the exhaust pressure sensor

Possible Solution:

1. Replacing any damaged wires in the EPS and/ or cleaning them
2. If the connectors were the problem, then erasing the code from the memory should result in a clear screen as opposed to the code returning
3. If the code returns, testing the sensor and its circuits
4. Checking the voltage of the EPS to see if it has suffered from failure