P0705 Transmission Range Sensor Circuit Malfunction (PRNDL Input)

P0705 indicates a transmission range sensor or PRNDL input circuit malfunction. The control module is not seeing a believable selector-position signal.

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 replace the transmission for a range-sensor code before checking sensor adjustment and circuit integrity.

Symptoms of P0705

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 P0705

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

Compare scan-tool range data with the actual shifter position in park, reverse, neutral, drive, and manual ranges.
Inspect range sensor adjustment, connector condition, corrosion, harness routing, and water intrusion near the transmission.
Check for start-inhibitor, reverse-lamp, limp-mode, or gear-display symptoms that match the range signal fault.

Related OBD-II codes

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