Transmission Range Sensor Circuit Low Input (PRNDL Input)
The transmission range sensor input signal is too low for proper operation.
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What it means (plain English)
The transmission range sensor tells the vehicle's computer what gear you're in. If it sends a weak signal (below 0.1 to 0.5 volts), the computer may think you're in the wrong gear, causing shifting issues.
What the computer is actually seeing
The vehicle's computer expects a voltage signal from the transmission range sensor that reflects the current gear selection. If the voltage is less than 0.1 volts when the shifter is in gear, it triggers this code.
What a healthy reading looks like
Expected input voltage from the transmission range sensor is typically between 0.5 to 4.5 volts, depending on gear selected.
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 transmission fluid level. Low fluid can cause shifting issues. Refilling may solve the problem.
- 2Inspect the wiring and connectors from the transmission range sensor to the TCM for any visible damage or corrosion.
- 3Using a multimeter, measure the voltage from the transmission range sensor. It should be between 0.5 to 4.5 volts. If it's below 0.1 volts, continue diagnosing.
- 4Check for any shorts or open circuits in the wiring harness to the transmission range sensor. Repair or replace as needed.
- 5If all checks are good but the code returns, consider replacing the transmission range sensor.
Common causes
- Faulty transmission range sensor
- Damaged wiring or connectors
- Low transmission fluid level
- Faulty transmission control module (TCM)
- Poor ground connection
Typical repair cost
$$
Related codes
Frequently asked questions
Can I still drive my vehicle with this code?
Yes, but expect shifting issues and erratic behavior. It's best to fix it soon.
Will this code come back after resetting the check engine light?
If the underlying issue isn't resolved, yes, the code will likely return.
Why do I see this code with others like P0710?
Related codes often indicate multiple issues within the transmission control system, such as sensor faults or circuit problems.
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