P0707: Transmission Range Sensor A Circuit Low Input

What does P0707 mean?

Transmission range sensor A input is below the expected electrical limit. An open feed, grounded circuit, or faulty switch can cause the controller to lose reliable gear-position information.

Generic OBD-II definition: Transmission Range Sensor A Circuit Low Input. Confirm applicability in your vehicle service information.

Common causes

• Range signal shorted to ground
• Open supply or poor connector
• Faulty or misadjusted range sensor

Symptoms

• No crank
• Incorrect gear indication
• Abnormal engagement or limp mode

Diagnostic focus

A low input is not a low transmission-fluid level code. Focus on the selector input and electrical pattern before diagnosing internal clutches.

Can I keep driving with P0707?

Severity: High Keep the vehicle secured and do not drive if the selected gear, displayed gear, or starting interlock is unreliable. Arrange diagnosis rather than bypassing the range/neutral-safety system.

If the check engine light is flashing or the car runs badly, stop driving and have it checked.

Typical fixes

• Inspect the range-sensor supply and ground
• Test the low input to the wiring diagram
• Verify sensor alignment and connector condition

Sources & review

• OBD-Codes.com: P0707
• TroubleCodes.net: generic code definitions

Definitions and diagnostic background checked 2026-11-06. Generic guidance, not a substitute for the service procedure for your exact year, engine, and transmission.