← View Generic P0748 Guide Severity: Medium

🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

P0748: P0748: Transmission Control System Malfunction

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 P0748 Mean on 2021 Honda PASSPORT?

The transmission control system is malfunctioning, causing issues with gear shifting and transmission operation.

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Symptoms

• Sluggish shifting
• hesitation between gears
• transmission slipping
• or failure to engage gears.

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Common Causes

• Faulty transmission control module
• faulty transmission solenoid
• clogged transmission filter
• or low transmission fluid level.

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How to Fix P0748 on 2021 Honda PASSPORT

1. Check transmission fluid level and top off as needed. 2. Scan for any other trouble codes. 3. Replace the transmission control module if faulty. 4. Clean or replace the transmission solenoid if faulty. 5. Replace the transmission filter if clogged.

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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 solenoid Shop ↗ Transmission 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 P0748

P0746 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