Transmission Range Control A Circuit High

Common symptoms

What you'll notice

• Check the transmission range sensor for any damage or malfunction.
• Inspect the wiring and connectors related to the transmission range sensor for any loose or damaged connections.
• Test the voltage and resistance of the transmission range sensor to ensure it is functioning properly.
• Update the transmission control module software to the latest version.
• Replace the transmission range sensor if all other solutions do not resolve the issue.

Common causes

Most likely first

1. Faulty transmission range sensor
2. Open or short circuit in the wiring harness of the transmission range sensor
3. Malfunctioning transmission control module
4. Low or incorrect transmission fluid level
5. Faulty transmission solenoids

How to diagnose & fix

Work through it in order

1. Difficulty shifting gears or engaging the transmission
2. Delayed or erratic shifting patterns
3. Unintended downshifting or upshifting
4. Vehicle may not start due to issues with the transmission range control
5. Shift indicator malfunction or incorrect gear display