Damaged, corroded or loose wiring or connectors on the network or supply to the range control module; Low battery voltage or poor power or earth supply to the range control module; Water ingress or corrosion inside the range control module or selector connector; Fault with the data network itself, such as a shorted or open bus line or a faulty gateway; Internal fault in the transmission range control module or the module that receives its messages; Outdated or faulty software in the range control module or connected modules, where the manufacturer has issued an update for this fault.

P07F2

Transmission Range Control Module Communication Circuit.

Generic
Powertrain
Generic code
High severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
7: AreaTransmission
F2: FaultThe specific fault in that area

What it means

P07F2 is a generic code for a fault in the communication circuit linked to the transmission range control module, the unit that manages selection of park, reverse, neutral and drive. The control unit that sets it has lost the expected messages from that module, or has received messages that are missing, corrupt or implausible. Exactly which unit logs it and how the range selection is wired (shift-by-wire, selector module or conventional) depends on the vehicle, so check manufacturer data for the model.

Symptoms

Gearbox warning light or message on the dashboard, often with the engine management light
Gear selector position not shown or shown wrongly on the display
Car will not engage a gear, or will not start or shift out of park
Gearbox stuck in one gear or in a limp-home mode
Harsh, delayed or erratic shifts
Other communication fault codes stored in several modules

Possible causes

Damaged, corroded or loose wiring or connectors on the network or supply to the range control modulelikely
Low battery voltage or poor power or earth supply to the range control modulelikely
Water ingress or corrosion inside the range control module or selector connectorpossible
Fault with the data network itself, such as a shorted or open bus line or a faulty gatewaypossible
Internal fault in the transmission range control module or the module that receives its messagespossible
Outdated or faulty software in the range control module or connected modules, where the manufacturer has issued an update for this faultrare

How to diagnose

Read all stored codes and freeze frame data, noting which modules report a loss of communication and whether the fault is current or intermittent
Check battery condition and charging voltage, as low voltage commonly causes false communication faults
Inspect the range control module, selector and gearbox connectors and wiring for damage, chafing, water and corrosion
Check the fuses and the power and earth supplies to the range control module against the wiring diagram
Check the network wiring between the modules for continuity, shorts and correct resistance, following the manufacturer's procedure
Use a scan tool to check that the range control module responds and that live selector position data matches the actual lever position
Check for any manufacturer service bulletins or software updates relevant to the model and gearbox
Wiggle-test the harness with live data running to find intermittent faults

How to fix

Repair or replace damaged wiring and clean or replace corroded or loose connectors
Correct power or earth supply faults and replace any blown fuses after finding why they failed
Charge or replace a weak battery and repair any charging fault
Repair the network fault or replace the faulty gateway or module once confirmed by testing
Replace and code the range control module if it is confirmed faulty, following the manufacturer's procedure
Update the software on the affected modules if an approved update exists for this fault

Can I keep driving?

High severity

Avoid driving until it is diagnosed, as the car may fail to select a gear, lose drive or fail to hold park securely. If it must be moved, do so only a short distance and make sure the handbrake works.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.