Engine-Codes.com
Engine-Codes – Generic – P0801

P0801 Code - Reverse Inhibit Control Circuit Malfunction

Quick Answer

The P0801 diagnostic trouble code (DTC) indicates a malfunction in the reverse inhibit control circuit of a vehicle. Common causes include Faulty reverse inhibit control switch, Damaged wiring or connectors in the circuit, Malfunctioning TCM or PCM. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0801 indicates Reverse Inhibit Control Circuit Malfunction.
Common causes
Common causes include Faulty reverse inhibit control switch, Damaged wiring or connectors in the circuit, Malfunctioning TCM or PCM.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0801 Description

The P0801 diagnostic trouble code (DTC) indicates a malfunction in the reverse inhibit control circuit of a vehicle. This circuit is responsible for preventing the vehicle from engaging reverse gear while the vehicle is moving forward. When this circuit malfunctions, it can lead to safety issues and potential damage to the transmission system.

OBDII Code P0801 - Reverse Inhibit Control Circuit Malfunction
P0801 Code - Reverse Inhibit Control Circuit Malfunction

Common Causes of P0801

  1. Faulty reverse inhibit control switch.
  2. Damaged wiring or connectors in the circuit.
  3. Malfunctioning TCM or PCM.
  4. Corrosion or poor connections in the circuit.
  5. Mechanical issues in the transmission system affecting reverse gear engagement.

Symptoms of P0801

  1. Inability to shift into reverse gear.
  2. Vehicle unexpectedly shifting into reverse while driving forward.
  3. Delayed engagement when shifting into reverse.
  4. Transmission slipping or jerking when attempting to shift into reverse.
  5. Check Engine Light illuminated on the dashboard.

How to Fix P0801

  1. Diagnose the issue by using a scan tool to retrieve the DTC and inspect the reverse inhibit control circuit for any visible damage or loose connections.
  2. Test the reverse inhibit control switch for proper functionality and replace if necessary.
  3. Check the wiring and connectors in the circuit for damage or corrosion, repairing or replacing as needed.
  4. Inspect the TCM or PCM for any faults or errors related to the reverse inhibit control circuit, reprogramming or replacing the module if required.
  5. Test drive the vehicle after repairs to ensure proper operation of the reverse gear engagement.

Cost to Fix P0801

The typical repair costs for a P0801 code can vary depending on the specific cause of the issue. In general, replacing a faulty reverse inhibit control switch or repairing damaged wiring may cost between $100 to $300. If the issue is related to a malfunctioning TCM or PCM, the repair costs can range from $500 to $1000 or more, including parts and labor. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's advisable to check local rates for a more accurate estimate.

Need more information about the P0801 code?

Need more information on how to fix the P0801 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0801 code diagnosed by a professional: Find a repair shop in your area

Code P0801 Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0801 Code

No Frequently Asked Questions about P0801 Code found.

Discuss the causes and fixes for P0801 OBDII Code

Submit a New Comment

Code P0801 comments

No comments found for this page.