TorqueMech Beta
TorqueMech OBD Code Guide

P0813 - Reverse Output Circuit

The controller detected an invalid transmission range or start-enable input, which can come from a switch fault, adjustment problem, or circuit issue.

Continue Estimate Browse Diagnostics Browse Repair Guides

Code first. Confirm symptoms and checks before pricing parts.

Read code pattern Check likely system Estimate after confirmation

Code Overview

The controller detected an invalid transmission range or start-enable input, which can come from a switch fault, adjustment problem, or circuit issue.

Common Causes

  • Misadjusted or failed range switch
  • Damaged wiring or corroded connector
  • Shifter linkage issue
  • Control-module input fault

Diagnostic Steps

  1. Confirm the range switch or linkage is adjusted correctly
  2. Inspect connectors for corrosion or water intrusion
  3. Verify the PCM or TCM sees the correct range input
  4. Check related start-enable and reverse-lamp circuits

Likely Repairs & Cost Guides

Confirm the repair path before pricing parts.

Continue Estimate

Related OBD Codes

Browse nearby codes when systems overlap.

P0812
Reverse Input Circuit
Open code guide →
P0814
Transmission Range Display Circuit
Open code guide →
P0811
Excessive Clutch Slippage
Open code guide →
P0815
Upshift Switch Circuit
Open code guide →
P0810
Clutch Position Control Error
Open code guide →

Next Steps

Move from code to checks, then estimate.

Estimate This Repair Diagnostic Guides Search Another Code