← View Generic C0991 Guide Severity: Medium

🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

C0991: C0991: Electronic Stability Control (ESC) Malfunction

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 C0991 Mean on 2021 Honda PASSPORT?

The Electronic Stability Control (ESC) system has detected a malfunction, which may cause the vehicle to lose traction or stability.

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Symptoms

• Vibration
• loss of traction
• or difficulty steering
• especially during sudden turns or hard braking.

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Common Causes

• Faulty ESC module
• faulty wheel speed sensors
• faulty yaw rate sensor
• or a malfunctioning steering angle sensor.

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How to Fix C0991 on 2021 Honda PASSPORT

1. Clear any trouble codes and perform a system reset. 2. Check and replace faulty wheel speed sensors. 3. Check and replace faulty yaw rate sensor. 4. Check and replace faulty steering angle sensor. 5. Update ESC software if necessary.

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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

ESC module Shop ↗ wheel speed sensors Shop ↗ yaw rate sensor Shop ↗ steering angle sensor 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 C0991

C0989 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