← View Generic C1605 Guide Severity: Medium

🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

C1605: C1605: Suspension Control Module (SCM) Fault

on 2021 Honda PASSPORT

Fix Cost

$200 - $800

Parts & Labor

Difficulty

3/5

1-2 hours

DIY Possible?

❌ No

Pro recommended

Your Vehicle

2021 Honda

PASSPORT

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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 C1605 Mean on 2021 Honda PASSPORT?

The Suspension Control Module (SCM) has detected a fault in the suspension system. This code is specific to Toyota and indicates a problem with the SCM's communication with the suspension sensors.

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Symptoms

• Unusual suspension behavior
• uneven tire wear
• reduced ride height
• and possible loss of stability control

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Common Causes

• Faulty suspension sensors
• damaged or corroded wiring
• or a malfunctioning SCM

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How to Fix C1605 on 2021 Honda PASSPORT

1. Check and clear any trouble codes. 2. Inspect and clean the suspension sensors and wiring. 3. Replace the SCM if faulty. 4. Check and adjust the suspension system for proper alignment.

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Need Maintenance Info for Your PASSPORT?

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Parts for 2021 Honda PASSPORT

Suspension Control Module Shop ↗ Suspension sensors Shop ↗ Wiring harness 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 C1605

C1603 Sequential Code

💡 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