DTC C1640: Variant Code Un-Writing/Data Abnormal: Notes
WARNING: This page is about a different car, the 2009 Mitsubishi Eclipse. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines. (Refer to
TROUBLE CODE DIAGNOSIS
).
CAUTION:
Whenever the ECU is replaced, ensure that the CAN bus lines are normal.