DN5 - Attempt to Generate DTC 327

Diagnostic Trouble Code (DTC) 337 indicates the EGR Valve Position (EVP) sensor signal is greater than the Self-Test maximum value of 4.81 volts.

Possible causes:

- Damaged EVP sensor.

- Short to power in harness.

- Open in SIG RTN.

- Damaged Powertrain Control Module (PCM).

- Key "OFF".

- Disconnect EVP sensor.

- Rerun Key On Engine Off (KOEO) and Key On Engine Running (KOER) Self-Test. Quick Test Appendix (Detailed Testing Instructions)

- Is DTC 327 present (ignore all other DTC's)?

Yes -- Go to DN6. DN6 - Check VREF Circuit Voltage

No -- Go to DN7. DN7 - Check EVP Circuit For Short to Power