← View Generic P0819 Guide Severity: Medium

🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

P0819: P0819: Transmission Control Module (TCM) Internal Fault

on 2021 Honda PASSPORT

Fix Cost

$200 - $1000

Parts & Labor

Difficulty

3/5

1-2 hours

DIY Possible?

❌ No

Pro recommended

Your Vehicle

2021 Honda

PASSPORT

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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 P0819 Mean on 2021 Honda PASSPORT?

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

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Symptoms

• Transmission slipping
• hesitation
• or refusal to engage gears
• unusual noises
• or erratic shifting

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Common Causes

• Faulty TCM
• transmission solenoid pack
• faulty transmission sensor
• or wiring issues

🛠️

How to Fix P0819 on 2021 Honda PASSPORT

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

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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 sensor 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 P0819

P0817 Sequential Code

💡 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