P0801 Code - Reverse Inhibit Control Circuit Malfunction

What does P0801 Mean?

OBD-II Code Transmission may not shift into reverse is defined as a Reverse Inhibit Control Circuit

The Reverse Inhibit Solenoid (Lockout Solenoid) prevents a manual transmission from being able to go into reverse at the wrong time. If this solenoid fails to operate properly, code P0804 will be stored.

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What are the common causes of P0801 ?

• An air leak forward of the DPF will change the sensor readings resulting in the code
• Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
• Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)

How do you troubleshoot P0801 ?

The most common repairs for a P0801 are as follows:

• Replacing the reverse inhibitor switch.
• Repairing any damaged wiring for the switch.
• Replacing a damaged shifter.

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