← View Generic C1840 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2021 Honda PASSPORT
C1840: C1840: Wheel Speed Sensor 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
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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 C1840 Mean on 2021 Honda PASSPORT?
The wheel speed sensor is not functioning properly, which can cause issues with the vehicle's anti-lock braking system (ABS) and traction control system. This code is specific to Ford vehicles. (Ford)
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Symptoms
- • ABS warning light on
- • traction control system malfunction
- • vehicle may vibrate or pull to one side
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Common Causes
- • Faulty wheel speed sensor
- • wiring issue
- • sensor connector corrosion
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How to Fix C1840 on 2021 Honda PASSPORT
1. Check and clean the wheel speed sensor connector. 2. Replace the wheel speed sensor if faulty. 3. Check and repair any wiring issues.
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Need Maintenance Info for Your PASSPORT?
Get oil capacity, filter specs, and torque settings for your specific 2021 Honda PASSPORT.
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Related Diagnostic Codes
Other codes that may appear with C1840
C1838
Sequential Code
C1838: Electronic Stability Control (ESC) Malfunction
Medium
C1839
Sequential Code
C1839: Traction Control Malfunction
Medium
C1841
Sequential Code
C1841: ABS System Malfunction
Medium
C1842
Sequential Code
C1842: Brake 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