← View Generic P0813 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

P0813: P0813: Transmission Control Module (TCM) Internal Fault

on 2021 Honda PASSPORT

Fix Cost
$500 - $1500
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
❌ No
Pro recommended
Your Vehicle
2021 Honda
PASSPORT
⚠️

Important for 2021 Honda PASSPORT Owners

Before starting repairs, verify which engine your 2021 Honda PASSPORT has. Check your VIN or engine code to ensure you order the correct parts.

📖 What Does P0813 Mean on 2021 Honda PASSPORT?

The Transmission Control Module (TCM) has detected an internal fault, which may be causing transmission problems or errors.
⚠️

Symptoms

  • • Transmission slips
  • • hesitation
  • • or refusal to engage gears
  • • unusual noises
  • • or warning lights on the dashboard.
🔍

Common Causes

  • • Faulty TCM
  • • transmission solenoid malfunction
  • • wiring issues
  • • or internal transmission damage.
🛠️

How to Fix P0813 on 2021 Honda PASSPORT

1. Clear the code and monitor the transmission's behavior. If the problem persists, replace the TCM. 2. Inspect and clean the transmission solenoids. 3. Check and repair any wiring issues. 4. Perform a transmission fluid flush and filter replacement.

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Need Maintenance Info for Your PASSPORT?

Get oil capacity, filter specs, and torque settings for your specific 2021 Honda PASSPORT.

View 2021 Honda PASSPORT Specs

Parts for 2021 Honda PASSPORT

Transmission Control Module Shop ↗ Transmission Solenoids Shop ↗ Transmission Fluid Filter Shop ↗

Essential Tool

Must Have

OBD2 Scanner

Read & clear codes on your 2021 Honda PASSPORT

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🔗

Related Diagnostic Codes

Other codes that may appear with P0813

P0811 Sequential Code

P0811: Transmission Control Module (TCM) Range/Performance Issue

Medium
P0812 Sequential Code

P0812: Transmission Control Module (TCM) Internal Fault

Medium
P0814 Sequential Code

P0814: Transmission Control Module (TCM) Range/Performance Issue

Medium
P0815 Sequential Code

P0815: Transmission Control Module (TCM) Internal Fault

Medium

💡 Why These Codes Are Related:

  • • Similar Issues: Same root cause or component failure
  • • Related Problems: Often occur together due to system interactions
  • • Sequential Codes: Progressive failure stages or multiple sensors
  • • Same System: Components within the same automotive system