P0812 OBD-II: Reverse Input Circuit

P0812 Severity

Urgent

Should you fix P0812 yourself?

Identifying an OBD code is just the start of a complete diagnostic routine. Most trouble codes are caused by a sensor reporting a value that is out of range. Just replacing a sensor may not fix underlying issues. Be sure to understand the code, the part or system in your car that the code refers to, and the risks of delaying professional repair.

Proper diagnosis will save you time and money on unnecessary repairs.

Urgent codes indicate immediate action is necessary. These are urgent and significant malfunctions that can cause severe damage to the vehicle or harm the driver and passengers.

Schedule Diagnosis

P0812 Summary Find a Repair Shop P0812 Details Ask RepairPal CarGenius Other OBD-II Codes

What causes OBD-II fault code P0812?

The Reverse Input Sensor tells the engine control module (PCM) that the transmission is in reverse. When the PCM detects an incorrect signal from the Reverse Input Sensor, the PCM will set code P0812.

OBD II Fault Code

OBD II P0812

OBD-II Code Reverse lights may not operate is defined as a Reverse Input Circuit

Reverse lights may not operate Symptoms

Reverse lights may not operate

Common Problems That Trigger the P0812 Code

Powertrain Control Module (PCM) failure
Reverse switch failure
Wiring issue

OBD Code Resources

Exceptional warranty

Shops offer at least a 12-month or 12,000-mile warranty.

Satisfied customers

We ensure high satisfaction through verified customer reviews.

Transparent pricing

You'll get a Fair Price Guarantee on all RepairPal estimates.

Millions trust us for auto repair — RepairPal Certified^® locations must pass a rigorous approval process to ensure quality, customer satisfaction, and fair pricing.

OBD II Fault Code

OBD II P0812

OBD-II Code Reverse lights may not operate is defined as a Reverse Input Circuit

Reverse lights may not operate Symptoms

Reverse lights may not operate

Common Problems That Trigger the P0812 Code

Powertrain Control Module (PCM) failure
Reverse switch failure
Wiring issue

P0812 OBD-II: Reverse Input Circuit

Should you fix P0812 yourself?

What causes OBD-II fault code P0812?

Need a P0812 diagnosis? Trust our experts.

OBD II Fault Code

Reverse lights may not operate Symptoms

Common Problems That Trigger the P0812 Code

OBD Code Resources

Ask our experts about P0812.

Other OBD-II Codes

OBD II Fault Code

Reverse lights may not operate Symptoms

Common Problems That Trigger the P0812 Code