Transmission

P0705 — Transmission Range Sensor Circuit Malfunction (PRNDL)

Severity: medium Drive with care, to a shop

What P0705 means

The engine or transmission control module received a signal from the transmission range sensor (also called the PRNDL input or neutral safety switch) that does not make sense, such as an open, a short, or an impossible combination of inputs. The sensor normally sits on the transmission and tells the module whether the selector is in P, R, N or D. The module uses this to allow engine start, turn on the backup lights and choose shift strategy.

Symptoms

  • Check Engine light on
  • Wrong or flickering gear indicator (PRNDL) on the dash
  • Engine will not start in Park or Neutral, or starts only in one of them
  • Harsh, delayed or erratic shifting
  • Backup lights not working
  • Transmission in limp mode

Possible causes

  1. Failed transmission range sensor
  2. Damaged or corroded wiring and connectors in the sensor circuit
  3. Shift cable or linkage out of adjustment
  4. Fault in the PCM or TCM input circuit
  5. Broken wiring in the console or floor harness
  6. Internal transmission or valve body problem affecting the sensor

How to diagnose

  1. Scan all codes and freeze frame data, and note any other transmission or network codes.
  2. Compare the shifter position with the dash display and with the range sensor reading on a scan tool.
  3. Inspect the sensor connector and harness on the transmission for corrosion, water, oil and chafed wires.
  4. Check shift cable or linkage adjustment: the sensor alignment mark and the lever on the transmission must match the selector position.
  5. Move the selector slowly through each range while watching the scan tool for dropouts or jumps in the signal.
  6. Test the sensor circuit with a multimeter for opens, shorts to ground and voltage, following the factory wiring diagram.
  7. Verify sensor power and ground; if wiring and sensor are good, suspect the control module.

Common fixes

  • Adjust the shift cable or linkage and realign the sensor
  • Replace the transmission range sensor
  • Repair wiring or replace the connector
  • Reflash or replace the control module if confirmed faulty

P0705 on different brands

Ford · manuals
On 2024-2025 Ford gasoline engines, the extended P0705:01 means the module saw an invalid pattern from the digital range sensor or a general fault, which does not by itself prove the sensor has failed.

Questions and answers

What does code P0705 mean?

The control module is receiving an invalid or intermittent signal from the transmission range sensor. The cause is most often the sensor, its connector, or the shift linkage adjustment.

Can I drive with P0705?

For a short distance, yes, but the transmission may go into limp mode and the car may not restart after you stop. Fix it soon.

Why won't my car start and I have P0705?

The module cannot confirm the selector is in Park or Neutral, so it blocks starting. Check the linkage adjustment and the range sensor.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.