P07F4: Transmission Range Control Module Communication Circuit High
Standardized SAE J2012 code · P07xx — Transmission
What does P07F4 mean?
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.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Symptoms
- Shift warning
- Possible shift lock or neutral (depends on manufacturer)
Common causes
- Medium Communication wire shorted to the supply
- Low Module faulty
- Low Connector fault
Likelihood is a general estimate across vehicles; your make and model may differ.
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