Transmission Range Sensor Circuit Range/Performance Problem (PRNDL Input)
This code indicates a problem with the transmission range sensor input 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 what gear the car is in. If it isn't working right, the computer can't tell if the car is in park, reverse, or drive, which can cause shifting problems.
What the computer is actually seeing
The computer expects to receive a specific voltage signal from the transmission range sensor based on the gear selection, typically around 0.5V to 4.5V depending on the gear position. If it sees no signal or an out-of-range value, it triggers this code.
What a healthy reading looks like
Expected voltage levels from the sensor should reflect the gear position: around 0.5V for Park, 1.5V for Neutral, and up to 4.5V for Drive.
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. Ensure it is at the correct level and in good condition. If low or dirty, change the fluid and retest.
- 22. Visually inspect the wiring and connectors leading to the transmission range sensor. Look for damage, corrosion, or loose connections.
- 33. Use a multimeter to measure the voltage at the transmission range sensor while someone moves the gear selector through each position. Compare the values with the expected values above.
- 44. If the voltage readings are incorrect, replace the transmission range sensor and retest the system.
- 55. If the sensor is outputting correct values, check for problems in the wiring harness leading to the control module or inspect the TCM itself.
Common causes
- Faulty transmission range sensor
- Open or shorted wiring in the sensor circuit
- Poor connection at the sensor or computer connector
- Faulty transmission control module (TCM)
- Mechanical issues within the transmission
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
It's moderate severity; drivability can be impacted, so it's best to fix soon.
Will this code come back after repairs?
If the repair is done correctly and no other issues are present, the code should not return.
Why does it pair with C0730?
C0730 and C0731 both relate to issues with the transmission range sensor, often indicating a similar problem.
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