← View Generic P0923 Guide Severity: High
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

P0923: P0923: Transmission Advanced System - Transmission Control Module (TCM) Internal Error

on 2021 Honda PASSPORT

Fix Cost
$500 - $2000
Parts & Labor
Difficulty
4/5
2-4 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 P0923 Mean on 2021 Honda PASSPORT?

The Transmission Control Module (TCM) has detected an internal error, which may be caused by a faulty TCM, wiring issue, or other internal transmission component failure.
⚠️

Symptoms

  • • Transmission slips
  • • hesitation
  • • or refuses to engage gears
  • • unusual noises
  • • or transmission warning light on the dashboard
🔍

Common Causes

  • • Faulty TCM
  • • wiring issue
  • • internal transmission component failure
  • • transmission fluid leak
  • • or low transmission fluid level
🛠️

How to Fix P0923 on 2021 Honda PASSPORT

1. Check transmission fluid level and condition; 2. Scan for any other trouble codes; 3. Inspect wiring and connectors for damage or corrosion; 4. Replace faulty TCM or internal transmission component; 5. Bleed transmission system if necessary

🔧

Need Maintenance Info for Your PASSPORT?

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Parts for 2021 Honda PASSPORT

Transmission Control Module Shop ↗ Transmission fluid 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 P0923

P0921 Sequential Code

P0921: Transmission Advanced System - Transmission Control Module (TCM) Internal Error

Medium
P0922 Sequential Code

P0922: Transmission Advanced System - Transmission Control Module (TCM) Internal Error

Medium
P0924 Sequential Code

P0924: Transmission Advanced System - Transmission Control Module (TCM) Internal Error

Medium
P0925 Sequential Code

P0925: Transmission Advanced System - Transmission Control Module (TCM) Internal Error

High

💡 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