← View Generic P0823 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

P0823: P0823: 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 P0823 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 slipping
  • • hesitation
  • • or refusal to engage gears
  • • unusual noises
  • • or the transmission warning light on the dashboard.
🔍

Common Causes

  • • Faulty TCM
  • • transmission solenoid pack
  • • faulty transmission sensors
  • • or wiring issues.
🛠️

How to Fix P0823 on 2021 Honda PASSPORT

1. Clear the code and monitor the vehicle to see if the problem persists. 2. Check and replace the transmission solenoid pack if faulty. 3. Inspect and replace transmission sensors if faulty. 4. Check and repair any wiring issues. 5. If the problem persists, replace the TCM.

🔧

Need Maintenance Info for Your PASSPORT?

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

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Parts for 2021 Honda PASSPORT

Transmission Solenoid Pack Shop ↗ Transmission Sensors Shop ↗ Wiring Harness 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 P0823

P0821 Sequential Code

P0821: Transmission Control Module (TCM) Internal Fault

Medium
P0822 Sequential Code

P0822: Transmission Control Module (TCM) Range/Performance Problem

Medium
P0824 Sequential Code

P0824: Transmission Control Module (TCM) Range/Performance Problem

Medium
P0825 Sequential Code

P0825: Transmission Control Module (TCM) Range/Performance Problem

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