← View Generic P0791 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

P0791: P0791: 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 P0791 Mean on 2021 Honda PASSPORT?

The transmission control system has malfunctioned, affecting gear shifting and operation. This code is typically set when the transmission control module detects an issue with the transmission's hydraulic pressure or solenoid operation.
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Symptoms

  • • Difficulty shifting gears
  • • slipping or hesitation between gears
  • • transmission warning light on the dashboard
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Common Causes

  • • Faulty transmission solenoids
  • • clogged transmission filter
  • • low transmission fluid level
  • • faulty transmission pressure sensor
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How to Fix P0791 on 2021 Honda PASSPORT

1. Check transmission fluid level and top off as needed. 2. Inspect and clean the transmission filter. 3. Replace faulty transmission solenoids. 4. Check and replace the transmission pressure sensor if necessary.

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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 solenoids Shop ↗ Transmission filter Shop ↗ Transmission pressure sensor Shop ↗

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OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with P0791

P0789 Sequential Code

P0789: Transmission Control System Malfunction Affecting Gear Shifting

Medium
P0790 Sequential Code

P0790: Transmission Control System Malfunction

Medium
P0792 Sequential Code

P0792: Transmission Control System Malfunction Affecting Gear Shifting

Medium
P0793 Sequential Code

P0793: Transmission Control System 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