P0707 Transmission Range Sensor Circuit Low Input

P0707 points to a low input from the transmission range sensor circuit. The PRNDL or selector-position signal is lower than the module expects.

Code details

Generic OBD-II · P0

System: Transmission
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not assume the shifter assembly is faulty until sensor power, ground, and adjustment have been verified.

Symptoms of P0707

Harsh, delayed, or slipping shifts, or being stuck in one gear.
Check-engine light, sometimes with limp-home mode.
Flaring RPM or a shudder under load.

Common causes of P0707

Low or degraded transmission fluid.
A failing speed sensor, shift solenoid, or pressure-control circuit.
Wiring, connector, or internal hydraulic/mechanical faults.

Useful checks before replacing parts

Check range sensor reference voltage, signal voltage, ground, connector tension, and harness damage with the shifter in each position.
Compare live range data with actual shifter position and look for positions that read low, invalid, or not selected.
Inspect for fluid contamination, corrosion, rubbed wiring, or incorrect range sensor alignment after transmission service.

Related OBD-II codes

These nearby transmission entries can help compare wording and pin down the fault area.