P31D4

DTC P31D4, sometimes indicated as P31D400 is an OBD diagnostic trouble code indicating a manufacturer-specific fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the air/fuel mixture causing p31d4.

DTC Trouble Code Search

Bulletins

Bulletins are notices put out by manufacturers in conjunction with the NHTSA to notify the public of manufacturing issues or changes.

21NA130 - EXTERIOR LIGHTING
CADILLAC: This service bulletin provides a repair procedure to correct a customer concern of malfunction indicator lamp (mil) illuminated, dtc P31E8, P31DB, P31D4 and/or P31E2 set.
21NA130 - ENGINE AND ENGINE COOLING
CADILLAC: This service bulletin provides a repair procedure to correct a customer concern of malfunction indicator lamp (mil) illuminated, dtc P31E8, P31DB, P31D4 and/or P31E2 set.