Transmission Range Sensor Circuit Range/Performance Problem
The transmission range sensor is reporting an out-of-range signal to the computer.
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 tells the computer which gear the transmission is in. If it sends a signal that's too high or too low, the computer thinks something is wrong, which can affect shifting.
What the computer is actually seeing
The transmission control module expects a certain voltage from the range sensor based on the gear position. Normally, in park, you should see about 0.5V-1.5V, and in drive, it could go up to about 4.0V-5.0V depending on the design.
What a healthy reading looks like
0.5V-1.5V in Park, 1.5V-3.5V in Neutral, 3.5V-4.5V in Drive, etc.
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 connectors leading to the transmission range sensor for damage or corrosion. If damaged, repair or replace before moving on.
- 22. Inspect the transmission fluid level. If low, top off and rerun the code; if the issue resolves, check for leaks.
- 33. Use a multimeter to check the voltage at the transmission range sensor against expected values. If out of range, replace the sensor.
- 44. If the sensor checks out, check for TCM faults or programming issues. Repair as needed.
Common causes
- Wiring harness issues or damaged connectors
- Faulty transmission range sensor
- Low transmission fluid levels
- Bad transmission control module (TCM)
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate severity. You can drive short distances, but shifting may be rough, and it could lead to further transmission issues.
Will this code come back after clearing?
If the underlying issue isn't fixed, yes, the code will likely return.
Why does this code sometimes pair with P0850?
P0850 indicates a circuit malfunction; both issues often stem from similar causes like bad wiring or poor connections.
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