P07F3 Transmission Range Control Module Communication Circuit Low

The transmission range control module is the separate shift-by-wire control unit that reads the selector and drives the range actuator. P07F3 is the electrical low check of its communication line: the line is shorted to ground and stays at a low level. No manufacturer document available to us uses it; the code fits a dedicated signal or redundancy line between selector, range control module and transmission or engine module rather than a CAN bus. GM handles a bus short under its own U2409 (bus off for 1 s, two trips). The module may block range changes or select neutral.

Likely causes

Symptoms

• Shift warning
• Possible shift lock or neutral (depends on manufacturer)

Repair estimate

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

Related codes

References: law.cornell.edu, gsi.ext.gm.com, mitsubishitechinfo.com.