Wiring in the range select circuit shorted to ground or chafed, or a damaged harness; Corroded, contaminated or loose connector at the transmission range sensor or switch; Faulty transmission range sensor or multi-function switch; Selector linkage or cable out of adjustment so the sensor reads an invalid position; Transmission fluid or water ingress into the sensor or internal harness; Faulty gear selector or shift module (on vehicles that have a separate one); Internal fault in the transmission control unit.

P07EF

Transmission Range Multi-Function Select Circuit Low.

Generic
Powertrain
Generic code
Medium severity

How this code is built

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

What it means

P07EF means the transmission control unit has seen a voltage or signal that is too low on the transmission range multi-function select circuit. This circuit reports the selector position (Park, Reverse, Neutral, Drive) to the control unit. The exact wiring, sensor type and signal levels depend on the vehicle, so check the model-specific data before condemning parts.

Symptoms

Gearbox warning light or engine management light on
Transmission in limp mode or stuck in one gear
Gear selector position on the dash missing, flashing or wrong
Engine will not start, or starts in more than one selector position
Harsh, delayed or absent gear engagement
Reverse lights or shift lock behaving oddly

Possible causes

Wiring in the range select circuit shorted to ground or chafed, or a damaged harnesslikely
Corroded, contaminated or loose connector at the transmission range sensor or switchlikely
Faulty transmission range sensor or multi-function switchlikely
Selector linkage or cable out of adjustment so the sensor reads an invalid positionpossible
Transmission fluid or water ingress into the sensor or internal harnesspossible
Faulty gear selector or shift module (on vehicles that have a separate one)possible
Internal fault in the transmission control unitrare

How to diagnose

Read all stored and pending codes and freeze frame data, noting selector position, vehicle speed and whether other transmission or network codes are present
Compare the selector position shown on a scan tool live data screen with the actual lever position as you move through each range
Inspect the range sensor or switch wiring and connectors for chafing, corrosion, fluid contamination and bent or pushed-out pins
Check the selector cable or linkage adjustment and the sensor alignment against the manufacturer's procedure
With the ignition on, measure the supply, reference and signal voltages at the sensor connector and compare with model-specific values
With the connector unplugged, test the signal wire for continuity and for a short to ground between the sensor and control unit
Wiggle test the harness with live data on screen to find intermittent faults
Test or substitute the sensor or switch only after the wiring and linkage have been confirmed good

How to fix

Repair or replace damaged wiring, and clean or replace corroded or contaminated connectors and terminals
Replace the transmission range sensor or multi-function switch and set it up as the manufacturer specifies
Adjust or replace the selector cable or linkage and re-align the sensor
Fix any fluid or water leak into the harness or connector, then replace any affected components
Replace the gear selector or shift module if tests show it is at fault
Repair or replace the transmission control unit only if all inputs and wiring test correctly and the manufacturer confirms a fault

Can I keep driving?

Medium severity

Short, careful driving to a workshop may be possible, but the gearbox may drop into limp mode or fail to engage a gear, so avoid long trips. If the car will not hold a gear, starts in the wrong range or shows an unreliable selector position, stop driving it.

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