← View Generic B0140 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

B0140: B0140: Seat Position Sensor Circuit Malfunction

on 2021 Honda PASSPORT

Fix Cost
$150 - $300
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 B0140 Mean on 2021 Honda PASSPORT?

The B0140 code indicates a malfunction in the seat position sensor circuit, which is responsible for monitoring the position and movement of the vehicle's seats.
⚠️

Symptoms

  • • Seat position sensor error message on the dashboard
  • • seats may not move or may move erratically
  • • seat belt warning lights may be illuminated.
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Common Causes

  • • Faulty seat position sensor
  • • wiring issues
  • • seat motor failure
  • • or a problem with the seat control module.
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How to Fix B0140 on 2021 Honda PASSPORT

1. Disconnect the battery to reset the system. 2. Check and clean the seat position sensor and wiring. 3. Replace the faulty seat position sensor. 4. Check and replace the seat motor if necessary. 5. Update the seat control module software if necessary.

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Need Maintenance Info for Your PASSPORT?

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Parts for 2021 Honda PASSPORT

Seat position sensor Shop ↗ Wiring harness Shop ↗ Seat motor Shop ↗

Essential Tool

Must Have

OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with B0140

B0138 Sequential Code

B0138: Door Locks Malfunction

Medium
B0139 Sequential Code

B0139: Power Window Circuit Malfunction

Medium
B0141 Sequential Code

B0141: Low Beam Headlight Relay Circuit Malfunction

Medium
B0142 Sequential Code

B0142: Immobilizer System Malfunction

High

💡 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