Powertrain, generic · Transmission
P07F4 Transmission Range Control Module Communication Circuit High
Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible
The transmission range control module is the separate shift-by-wire control unit that reads the selector and drives the range actuator. P07F4 is the electrical high check of its communication line: the line is shorted to the supply and stays at a high level. No manufacturer document available to us uses it; as with P07F3 it fits a dedicated signal or redundancy line rather than a CAN bus, whose faults GM reports under its own U codes. The module may block range changes or select neutral.
Likely causes
Communication wire shorted to the supply
Module faulty
Connector fault
Symptoms
- Shift warning
- Possible shift lock or neutral (depends on manufacturer)
Repair estimate
DifficultyHardWorkshop job
Parts and labour€100–800
Time1–3 h
Typical range across vehicles; the real cost depends on what the testing finds.
Parts involved
shift by wire modulecommunication wiringtransmission control module
Related codes
References: law.cornell.edu, gsi.ext.gm.com, mitsubishitechinfo.com.