Diagnostic Trouble Code (DTC) index

WARNING: This page is about a different car, the 1998 Jaguar XK8. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSTIC TROUBLE CODE (DTC) INDEX

DTC	Description	Possible Source	Action
P1637	CAN ABS/TCCM token missing	CAN open circuit fault - ABS/TCCM to ECM CAN short circuit fault ABS/TCCM failure ECM failure	For CAN open circuit tests, GO to Pinpoint Test G270232P18 . For CAN short circuit tests, GO to Pinpoint Test G270232P19 . Contact dealer technical support for advice on possible module failure.
P1638	CAN IC token missing	CAN open circuit fault - IC to ECM CAN short circuit fault IC failure ECM failure	For CAN open circuit tests, GO to Pinpoint Test G270232P18 . For CAN short circuit tests, GO to Pinpoint Test G270232P19 . Contact dealer technical support for advice on possible module failure.
P1642	CAN circuit malfunction	CAN short circuit fault Control module failure - check for additional logged DTCs to locate control module source	For CAN short circuit tests, GO to Pinpoint Test G270232P19 . Contact dealer technical support for advice on possible module failure.
P1643	CAN TCM token missing	CAN open circuit fault - TCM to ECM CAN short circuit fault TCM failure ECM failure	For CAN open circuit tests, GO to Pinpoint Test G270232P18 . For CAN short circuit tests, GO to Pinpoint Test G270232P19 . Contact dealer technical support for advice on possible module failure.
P1649	ECM flash programming circuit malfunction	ECM to DLC circuit: short circuit to ground, short circuit to battery	For ECM flash programming circuit tests, GO to Pinpoint Test G270232P22 .
None	SCP circuit malfunction	Short circuit fault in SCP network	For SCP circuit tests, GO to Pinpoint Test G270232P20 .
None	ISO circuit malfunction	Short circuit fault in ISO network	For ISO circuit tests, GO to Pinpoint Test G270232P21 .