Faulty transmission range sensor or multi-function switch (internal fault); Damaged, chafed or corroded wiring causing a short to voltage on the signal circuit; Corroded, wet or loose connector or bent terminals at the range switch or control unit; Selector cable or linkage out of adjustment, or switch mounted out of position; Fluid or water contamination inside the switch or its connector; Faulty transmission control unit or its internal driver circuit.

P07F0

Transmission Range Multi-Function Select Circuit High.

Generic
Powertrain
Generic code
Medium severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
7: AreaTransmission
F0: FaultThe specific fault in that area

What it means

P07F0 means the transmission control unit has detected a voltage that is too high on the multi-function range select circuit, which is the signal telling it which selector position (park, reverse, neutral, drive) has been chosen. The fault is set when the signal reads above the expected range, typically from a short to voltage, a fault inside the range switch or a wiring or connector problem. Exact circuit layout and voltage thresholds vary by vehicle, so check the model-specific data.

Symptoms

Gear position indicator on the dash is wrong, flashing or blank
Gearbox warning light or malfunction light on
Car goes into limp mode or stays in one gear
Harsh, delayed or no engagement of drive or reverse
Engine will not start in park or neutral, or starts in other positions
Reverse lights not working correctly

Possible causes

Faulty transmission range sensor or multi-function switch (internal fault)likely
Damaged, chafed or corroded wiring causing a short to voltage on the signal circuitlikely
Corroded, wet or loose connector or bent terminals at the range switch or control unitlikely
Selector cable or linkage out of adjustment, or switch mounted out of positionpossible
Fluid or water contamination inside the switch or its connectorpossible
Faulty transmission control unit or its internal driver circuitrare

How to diagnose

Read all stored and pending codes and note freeze frame data, including whether other transmission, supply voltage or communication codes are present
Compare the selector position shown in live data with the actual lever position as you move through each gear
Visually inspect the range switch, selector cable or linkage and harness for damage, movement, leaks and incorrect alignment
Disconnect and inspect the connectors at the switch and control unit for corrosion, moisture, bent or pushed-back pins
Check the battery condition and the supply and earth feeds to the switch and control unit against manufacturer data
With a multimeter, measure the reference and signal voltages at the switch and compare them with manufacturer specifications
Check the signal wire for a short to voltage by isolating the harness from the switch and the control unit
Look for manufacturer software updates or technical bulletins for the model, and only consider an update if one covers this fault

How to fix

Replace the range sensor or multi-function switch if it fails testing, then adjust it to the manufacturer's procedure
Repair or replace damaged wiring and fix the cause of the short to voltage
Clean, dry or replace corroded connectors and repair loose or damaged terminals
Adjust or repair the selector cable or linkage and set the switch position correctly
Replace or repair the transmission control unit only after wiring, switch and supply checks prove it faulty, and carry out any required programming
Apply a manufacturer calibration update only if it is a documented fix for this fault

Can I keep driving?

Medium severity

The car may be driveable, but the gearbox can go into limp mode or fail to select gears correctly, so avoid long journeys and get it checked soon. Stop driving if you cannot reliably select gears or if the car starts or moves unexpectedly.

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