← View Generic P0870 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

P0870: P0870: 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 P0870 Mean on 2021 Honda PASSPORT?

The Transmission Control Module (TCM) has detected a problem with its range and performance, which can cause issues with the transmission's ability to shift gears properly.
⚠️

Symptoms

  • • Transmission slips
  • • hesitation
  • • or refuses to engage gears
  • • unusual noises
  • • or vibrations while driving.
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Common Causes

  • • Faulty TCM
  • • faulty transmission solenoids
  • • faulty transmission sensors
  • • wiring issues
  • • or software problems.
🛠️

How to Fix P0870 on 2021 Honda PASSPORT

1. Clear any trouble codes and test drive the vehicle to see if the issue persists. 2. Check and replace any faulty transmission solenoids or sensors. 3. Inspect and repair any wiring issues. 4. Update the TCM software if necessary. 5. Replace the TCM if all else fails.

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Need Maintenance Info for Your PASSPORT?

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Parts for 2021 Honda PASSPORT

Transmission Control Module Shop ↗ Transmission Solenoids Shop ↗ Transmission Sensors 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 P0870

P0868 Sequential Code

P0868: Transmission Control Module (TCM) Range/Performance Problem

Medium
P0869 Sequential Code

P0869: Transmission Control Module (TCM) Range/Performance Problem

Medium
P0871 Sequential Code

P0871: Transmission Control Module (TCM) Range/Performance Problem

Medium
P0872 Sequential Code

P0872: 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