← View Generic P0805 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

P0805: P0805: Transmission Control Module (TCM) Range/Performance Problem

on 2021 Honda PASSPORT

Fix Cost
$500 - $1500
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 P0805 Mean on 2021 Honda PASSPORT?

The TCM has detected a problem with the transmission's range and performance, which can cause issues with gear shifting, hesitation, or slipping.
⚠️

Symptoms

  • • Transmission hesitation
  • • slipping
  • • or difficulty shifting gears
  • • unusual noises
  • • or the check engine light is illuminated.
🔍

Common Causes

  • • Faulty transmission solenoid
  • • faulty transmission pressure sensor
  • • faulty transmission temperature sensor
  • • faulty transmission control module
  • • or a problem with the transmission's hydraulic system.
🛠️

How to Fix P0805 on 2021 Honda PASSPORT

1. Use a scan tool to retrieve live data and monitor the transmission's performance. 2. Check the transmission's hydraulic system for leaks or damage. 3. Replace the faulty transmission solenoid, pressure sensor, or temperature sensor. 4. Update the transmission control module's software. 5. Perform a transmission fluid flush and replace the fluid.

🔧

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 pressure sensor Shop ↗ Transmission temperature sensor Shop ↗ Transmission control module software update 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 P0805

P0803 Sequential Code

P0803: Transmission Control Module (TCM) Range/Performance Issue

Medium
P0804 Sequential Code

P0804: Transmission Control Module (TCM) Range/Performance Problem

Medium
P0806 Sequential Code

P0806: Transmission Control Module (TCM) Range/Performance Problem

Medium
P0807 Sequential Code

P0807: Transmission Control Module (TCM) Range/Performance Issue

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