2024年9月8日 · The P0812: Reverse Input Circuit fault refers to a malfunction in the reverse input circuit, which signals the transmission control module (TCM) when the reverse gear is selected. This issue can be caused by a faulty circuit, wiring problems, or a …

If your vehicle has stored a code P0812, it means that the powertrain control module (PCM) has detected a malfunction in the reverse input signal circuit. The transmission control module (TCM) may be a stand alone module or part of the PCM.

Symptoms of a P0812 include: How to Diagnose the Code? To diagnose a P0812 OBDII trouble code, the technician should start by inspecting the wiring and connectors. The reverse input switch itself should also be tested, along with the appropriate fuses and bulbs. Need a replacement transmission?

2025年1月27日 · When a vehicle’s PCM triggers a P0812 code, several symptoms may manifest: Check Engine Light: The most common indication is the illumination of the check engine light on the dashboard. Inoperative Backup Lamps: The backup lights may fail to illuminate when the vehicle is shifted into reverse, posing a safety risk.

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. Need a P0812 diagnosis? Trust our experts.

2019年5月9日 · How to Fix the DTC P0812? Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded. What is the Cost to Diagnose the Code?

OBD2 Diagnostic Trouble Code P0812 means that Reverse Input Circuit has been detected. How Serious Is the Code P0812? This issue is critical and can lead to damages in your car. Please clear it first, drive your car for a couple of days. If the issue reappears, Carly recommends to fix your car to resolve this issue. *Every car is unique.

Common symptoms of a P0812 include: Reverse lights stop working – Typically the P0812 will not trigger a check engine light (CEL) unless it’s a repeated issue. The vehicle needs to see that the signal is being lost first before setting off a warning.

2022年5月26日 · Trouble code P0812 indicates a problem in the reverse input circuit. This means that the transmission control module (TCM) has detected a discrepancy between the reverse light switch signal and the transmission selector and shift position sensor signals.

Below are some reasons to set fault code P0812: – Incorrectly or deficiently programmed PCM (rarely). What are the symptoms of P0812 Malfunction Code? These symptoms may be present if you own a vehicle that has the code “P0812”. – The engine fault light turns on in some vehicles. This happens after at least two or three faults have been detected.