Transmission Range Sensor Circuit Range/Performance Problem
This code indicates a problem with the transmission range sensor circuit performance.
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 engine computer which gear the transmission is in. If it doesn't send the right information, the computer can't manage the engine properly, which can lead to shifting issues.
What the computer is actually seeing
The transmission control module expects specific voltage ranges from the range sensor based on the selected gear. If the voltage readings are inconsistent or out of range (0-5V expected), it sets this code.
What a healthy reading looks like
Voltage from the transmission range sensor should be between 0.5V (Park) to 4.5V (Drive) with a steady output depending on the gear position.
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 transmission fluid level. Add fluid if low; recheck for the code after. Decision: If fluid was low and topped off, monitor for future occurrences. If fluid is adequate, proceed.
- 22. Inspect the wiring and connectors at the transmission range sensor for damage or corrosion. Fix any issues found. Decision: If repairs were made, recheck for the code. If no issues were found, proceed.
- 33. Using a multimeter, measure the voltage output from the transmission range sensor while shifting through all gear positions. Expected values should be observed. Decision: If the voltage is within range, check the TCM. If out of range, replace the transmission range sensor.
Common causes
- Faulty transmission range sensor
- Wiring issues or poor connections in the sensor harness
- Low transmission fluid level
- Faulty transmission control module (TCM)
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's usually drivable but repairs are recommended soon due to potential shifting issues.
Will this issue come back?
If the underlying problem isn't fixed, yes, it will likely return after clearing the code.
Why does this code pair with P0700?
P0700 is a general code indicating a transmission issue; P0702 specifies the range sensor problem.
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