← View Generic P0894 Guide Severity: High

🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

P0894: P0894: Transmission Control Module (TCM) Internal Fault

on 2021 Honda PASSPORT

Fix Cost

$500 - $1500

Parts & Labor

Difficulty

4/5

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 P0894 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
• check engine light illuminated

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Common Causes

• Faulty TCM internal circuitry
• wiring issues
• or software corruption

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How to Fix P0894 on 2021 Honda PASSPORT

1. Clear any trouble codes and check for any pending codes. 2. Inspect and repair or replace any damaged wiring. 3. Update TCM software if necessary. 4. Replace the TCM if internal fault is confirmed.

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Need Maintenance Info for Your PASSPORT?

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Parts for 2021 Honda PASSPORT

Transmission Control Module Shop ↗ Wiring harness Shop ↗

Essential Tool

Must Have

OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with P0894

P0892 Sequential Code

P0896: Transmission Control Module (TCM) Internal Temperature Sensor Circuit Malfunction

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