P0705: Transmission Range Sensor Circuit Malfunction (PRNDL input)

Short answer: P0705 means “Transmission Range Sensor Circuit Malfunction (PRNDL input)”. It is a standard OBD-II code, so the basic meaning is the same on every car. Below is what it means on each of the 6 cars we cover, with a link to the full page for each car.

Standard OBD-II code Same meaning on all cars (SAE J2012).

P0705 on each car

Symptoms

1. Check engine light on
2. The backup lights may fail to function
3. It may be necessary to move the gearshift lever up and down slightly for a better contact to allow the starter to actuate and start the engine
4. It may be impossible to actuate the starter
5. In some cases, the engine will only start in neutral
6. May start in any gear

Likely causes

1. TRS is loose and mal-adjusted
2. Transmission range sensor is defective
3. Bad connector at the external TRS, either loose, corroded or bent pins
4. Shorted wiring harness on the external sensor as a result of rubbing on the transmission linkage
5. Blockage in the internal valve body TRS port or defective sensor
6. Diagnostic Steps & Possible Solutions
7. Replacement of an internal TRS requires using a Tech II for diagnosis, followed by draining the transmission and removing the pan. The sensor is…

What to check, in order

1. Read the code with a scanner that can read the gearbox computer
2. Check the gearbox fluid level and condition with the correct procedure
3. Check the connector and wiring at the gearbox
4. Have a gearbox specialist confirm before replacing parts

Causes and checks above are the general meaning. The exact test steps and values differ by car: open your car’s page.

All fault codes