← View Generic B0340 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

B0340: B0340: Seat Position Sensor Circuit Malfunction

on 2021 Honda PASSPORT

Fix Cost
$100 - $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 B0340 Mean on 2021 Honda PASSPORT?

The seat position sensor circuit has malfunctioned, preventing the vehicle's computer from accurately detecting the seat's position and adjusting the airbag system accordingly.
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Symptoms

  • • Seat position sensor error message on the dashboard
  • • airbag warning light on
  • • seat may not move properly
  • • or may not return to its original position after being adjusted.
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Common Causes

  • • Faulty seat position sensor
  • • wiring issue
  • • or a problem with the seat's electrical connector.
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How to Fix B0340 on 2021 Honda PASSPORT

1. Disconnect the battery to reset the system. 2. Check and clean the seat position sensor and its electrical connector. 3. Replace the faulty seat position sensor if necessary. 4. Check and repair any wiring issues. 5. Test the system to ensure it's functioning properly.

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Need Maintenance Info for Your PASSPORT?

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Parts for 2021 Honda PASSPORT

Seat position sensor Shop ↗ Electrical connector 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 B0340

B0338 Sequential Code

B0338: Door Locks Actuator Malfunction

Medium
B0339 Sequential Code

B0339: Power Window Relay Circuit Malfunction

Medium
B0341 Sequential Code

B0341: Turn Signal Lamp Malfunction

Medium
B0342 Sequential Code

B0342: Immobilizer 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