← View Generic P0738 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

P0738: P0738: Transmission Control System Malfunction

on 2021 Honda PASSPORT

Fix Cost
$200 - $800
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 P0738 Mean on 2021 Honda PASSPORT?

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

Symptoms

  • • Difficulty shifting gears
  • • slipping or hesitation between gears
  • • transmission warning light on
🔍

Common Causes

  • • Faulty transmission control module
  • • faulty transmission solenoid
  • • faulty transmission sensor
🛠️

How to Fix P0738 on 2021 Honda PASSPORT

1. Check and clear any trouble codes. 2. Inspect and clean the transmission solenoids. 3. Replace the faulty transmission solenoid. 4. Replace the faulty transmission control module.

🔧

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 solenoid Shop ↗ Transmission control module Shop ↗

Essential Tool

Must Have

OBD2 Scanner

Read & clear codes on your 2021 Honda PASSPORT

Shop Scanners ↗
🔗

Related Diagnostic Codes

Other codes that may appear with P0738

P0736 Sequential Code

P0736: Transmission Control System Malfunction

Medium
P0737 Sequential Code

P0737: Transmission Control System Malfunction

Medium
P0739 Sequential Code

P0739: Transmission Control System Malfunction

Medium
P0740 Sequential Code

Torque Converter Clutch 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