← View Generic P0820 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

P0820: P0820: Transmission Control Module (TCM) Range/Performance Problem

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
⚠️

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 P0820 Mean on 2021 Honda PASSPORT?

The Transmission Control Module (TCM) has detected a problem with the transmission's range and performance, which can cause issues with gear shifting and transmission operation.
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Symptoms

  • • Transmission slips
  • • hesitation
  • • or hesitation during acceleration
  • • difficulty shifting gears
  • • transmission warning light on
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Common Causes

  • • Faulty transmission solenoid
  • • faulty transmission pressure sensor
  • • faulty transmission temperature sensor
  • • faulty transmission control module
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How to Fix P0820 on 2021 Honda PASSPORT

1. Check and clear any trouble codes. 2. Inspect and clean the transmission solenoid and sensors. 3. Replace faulty sensors or solenoids. 4. Update the transmission control module software. 5. Check and adjust transmission fluid levels.

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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 solenoid Shop ↗ Transmission pressure sensor Shop ↗ Transmission temperature sensor Shop ↗ Transmission control module 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 P0820

P0818 Sequential Code

P0818: Transmission Range Sensor Circuit Malfunction

Medium
P0819 Sequential Code

P0819: Transmission Control Module (TCM) Internal Fault

Medium
P0821 Sequential Code

P0821: Transmission Control Module (TCM) Internal Fault

Medium
P0822 Sequential Code

P0822: Transmission Control Module (TCM) Range/Performance Problem

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