Transmission Range Sensor Circuit High Input
The transmission range sensor is reporting a high voltage input.
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What it means (plain English)
The transmission range sensor tells the computer where the gear selector is. A high input means the sensor is sending a voltage that’s too high, usually over 4.5 volts when it should be about 0-3.5 volts.
What the computer is actually seeing
The computer expects a low voltage signal (0-3.5V) from the transmission range sensor, which indicates the position of the shifter. If it gets a signal over 4.5V, it triggers this code.
What a healthy reading looks like
Voltage from the transmission range sensor should be between 0 and 3.5 volts in normal operation, and should not exceed 4.5 volts.
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.
- 1Check the condition of the transmission range sensor connector for corrosion or damage. If found, repair or replace before further testing.
- 2Measure the voltage at the transmission range sensor with the key on and the engine off. It should be between 0-3.5 volts. If it's over 4.5 volts, the sensor may be defective.
- 3Inspect the wiring between the sensor and the ECM for any signs of wear or shorts. Repair any issues found.
- 4If everything checks out, replace the transmission range sensor and clear the fault code.
Common causes
- Faulty transmission range sensor
- Dirty or damaged wiring harness
- Improperly adjusted shifter mechanism
- Short circuit in the sensor circuit
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to address this code promptly because it can affect shifting and lead to poor performance.
Will the code come back after clearing it?
If the issue isn't fixed, the code is likely to return.
Why does this code pair with others?
These codes often indicate related issues within the transmission control system.
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