P07F4Transmission Range Control Module Communication Circuit High
- Generic OBD-II code · Powertrain
- Can trigger limp mode
- How the car detects it
- 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.
- What you may notice
- Shift warning
- Possible shift lock or neutral (depends on manufacturer)
- Likely causes
- PossibleCommunication wire shorted to the supply
- RareModule faulty
- RareConnector fault
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.