Transmission Range Sensor Circuit Low Input (PRNDL Input or Switch)
The transmission range sensor is reading a low voltage signal.
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What it means (plain English)
The transmission range sensor tells the computer what position the gear shifter is in. If it sees a voltage that is too low, it thinks there's a problem and triggers this code.
What the computer is actually seeing
The transmission control module expects a voltage between 1-4 volts depending on the gear position. Anything below 1 volt indicates a fault.
What a healthy reading looks like
1-4 volts depending on gear position; Park: ~1V, Neutral: ~2.5V, Drive: ~4V.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Check the wiring and connector of the transmission range sensor; look for frays, corrosion, or loose connections. Decision: Are the connections good? If yes, go to step 2. If no, repair or replace the connector/wiring.
Common causes
- Faulty transmission range sensor
- Wiring issues or shorts in the sensor circuit
- Corroded connectors
- Bad engine or transmission grounds
- Fluid interference in sensor operation.
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to fix it soon, as it can lead to drivability issues.
Will this code come back after I've cleared it?
If the issue is resolved, the code should not return.
Why is it paired with codes like P0706 or P0708?
These codes relate to similar sensor inputs and faults in the transmission range circuits.
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