PCM DTC Chart

PCM DIAGNOSTIC TROUBLE CODE (DTC) LIST

DTC	Description	Action
P1260	Theft Detected, Vehicle Immobilized	If there are any Passive Anti-Theft System (PATS) DTCs present in the Instrument Cluster (IC), ADDRESS them first. This DTC may also indicate a Controller Area Network (CAN) concern or a parameter reset concern. Make sure to verify if there are any communication concerns/DTCs with any modules. REFER to MODULE COMMUNICATIONS NETWORK article. If DTC P1260 is the only DTC present, there may be a parameter reset, power or ground concern with the PCM. REFER to PASSIVE ANTI-THEFT SYSTEM (PATS) PARAMETER RESET . If necessary, CHECK the powers and grounds to the PCM. REFER to the SYSTEM WIRING DIAGRAMS article for Expedition, SYSTEM WIRING DIAGRAMS article for Expedition EL, SYSTEM WIRING DIAGRAMS article for Navigator or SYSTEM WIRING DIAGRAMS article for Navigator L .
P1602	Immobilizer/ ECM Communication Error	NOTE: If IC DTC U2510 is also present, address IC DTC U2510 first. Go To PINPOINT TEST G .
P1622	Immobilizer ID Does Not Match	CARRY OUT a parameter reset of the IC and the PCM and CYCLE the ignition 3-5 times, making an attempt to start the vehicle each key cycle. REFER to PASSIVE ANTI-THEFT SYSTEM (PATS) PARAMETER RESET . CLEAR the DTCs. CYCLE the ignition. REPEAT the self-test.
All other DTCs	-	REFER to the INTRODUCTION - GASOLINE MODELS article.