AutoCodes – Generic – P0813

P0813 Code - Reverse Output Circuit

Quick Answer

The Transmission Control Module (TCM) monitors the Reverse Output signal. Common causes include Faulty Reverse Input Switch, Reverse Input Switch harness is open or shorted, Reverse Input Switch circuit poor electrical connection. 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: P0813 indicates Reverse Output Circuit.
Common causes: Common causes include Faulty Reverse Input Switch, Reverse Input Switch harness is open or shorted, Reverse Input Switch circuit poor electrical connection.
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.

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Code Popularity 7,295

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 09, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0813 Description

The Transmission Control Module (TCM) monitors the Reverse Output signal. The TCM sets the OBDII code when the Reverse Output is not to factory specifications.

OBDII Code P0813 - Reverse Output Circuit - AutoCodes.com — P0813 Code - Reverse Output Circuit

What does this mean?

What are the Possible Causes of the DTC P0813?

Faulty Reverse Input Switch
Reverse Input Switch harness is open or shorted
Reverse Input Switch circuit poor electrical connection

How to Fix the DTC P0813?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0813 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0813 code?

Need more information on how to fix the P0813 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0813 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P0813 Chrysler — Reverse Output Circuit
P0813 Dodge — Reverse Output Circuit
P0813 Hyundai — Reverse Output Circuit
P0813 Jeep — Reverse Output Circuit
P0813 Mazda — Reverse Output Circuit
P0813 Mercedes-Benz — Reverse Output Circuit

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 P0813 Code

1. What are the common symptoms of OBDII code P0813 (Reverse Output Circuit)?

When this code is triggered, you may experience issues with the vehicle's automatic transmission, such as difficulty shifting into reverse or erratic behavior when in reverse gear.

2. What are the possible causes of OBDII code P0813?

The most common causes of code P0813 include a faulty reverse light switch, damaged or corroded wiring in the reverse light circuit, or a malfunctioning transmission range sensor.

3. How can I diagnose OBDII code P0813?

To diagnose code P0813, you can use an OBDII scanner to retrieve the fault code and then visually inspect the reverse light switch, wiring, and transmission range sensor for any signs of damage or corrosion.

4. Can I drive my vehicle with OBDII code P0813?

It is not advisable to drive your vehicle with code P0813 as it can lead to safety issues due to potential problems with the reverse gear function. It is recommended to address the issue promptly.

5. How can I repair OBDII code P0813?

Depending on the cause of the code, you may need to replace the reverse light switch, repair damaged wiring, or replace the transmission range sensor. It is recommended to consult a professional mechanic for an accurate diagnosis and repair.

6. Will resetting the OBDII code P0813 resolve the issue?

While clearing the fault code may temporarily turn off the check engine light, it will not fix the underlying issue causing code P0813. It is crucial to address the root cause of the problem for a permanent solution.

7. Can a DIY enthusiast fix OBDII code P0813 at home?

If you have experience working on automotive electrical systems and access to the necessary tools, you may be able to diagnose and repair code P0813 at home. However, complex transmission-related issues may require professional expertise.

8. Is OBDII code P0813 specific to certain vehicle makes and models?

Code P0813 can be found in various vehicle makes and models equipped with OBDII systems. However, the specific diagnostic and repair procedures may vary, so it is essential to consult the vehicle's service manual.

9. How much does it cost to repair OBDII code P0813?

The cost of repairing code P0813 can vary depending on the cause of the issue, the labor rates in your area, and the parts needed for repair. It is advisable to obtain multiple quotes from reputable repair shops.

10. Can a loose or disconnected battery cause OBDII code P0813 to appear?

In some cases, a loose or disconnected battery may reset the vehicle's computer, causing the code P0813 to appear. However, if the underlying issue is not resolved, the code is likely to reappear once the vehicle is driven again.