Transmission Range Sensor Performance Problem (PRNDL Input)
The transmission range sensor is indicating an incorrect position.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The transmission range sensor, which tells the computer what gear the vehicle is in, is giving bad info. This can cause shifting problems or even leave you stuck in one gear.
What the computer is actually seeing
The PCM expects the transmission range sensor to send a clear signal indicating the current gear. If the signal is erratic or out of range, it triggers this code.
What a healthy reading looks like
The sensor should provide voltage signals that correlate to specific gear positions: 0.5V for Park, 1.5V for Reverse, 2.5V for Neutral, and progressively higher for Drive positions up to 4.5V.
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 gear position (P, R, N, D) on the gear selector and ensure it matches the indicated position on the instrument panel. Decision Point: If they don't match, identify the cause.
- 22. Inspect wiring and connectors at the transmission range sensor for damage or corrosion. Decision Point: If damaged, repair or replace the wiring/connector and retest.
- 33. Use a multimeter to check the voltage signal from the transmission range sensor. It should change according to gear position (see expected values). Decision Point: If the sensor output is incorrect, replace the sensor and retest.
- 44. Check the vehicle's PCM for any additional fault codes and perform diagnostic tests on the PCM if needed.
Common causes
- Faulty transmission range sensor
- Wiring issues (corrosion, broken wires)
- Faulty powertrain control module (PCM)
- Poor connection at the transmission connector
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with a P0706 code?
It's moderate severity; you can drive it but expect shifting issues. Schedule repairs soon.
Will this code come back after clearing it?
If the underlying issue isn't fixed, yes, it will return.
Why does this code sometimes pair with other codes?
Issues with the transmission range sensor can affect multiple systems, leading to other related codes.
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