Detroit DD16 GHG14 (2014-16) Fault Code: SPN 511403 FMI 4 (CPC) Air1 Message (Air Supply Pressure) is Missing from First Source Address

NOTE: Please see the step by step troubleshooting procedures for this specific code.

PROBABLE CAUSES:
1. If any battery voltage codes present, fix those first.
2. If any 625-xx codes, fix those first.
3. If the CPC4 has been recently programmed, ensure the parameters are correct.
4. Turn key off for 5 minutes, then turn back on.