← View Generic C1804 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2018 BMW X5
C1804: C1804: Traction Control System Malfunction
on 2018 BMW X5
Fix Cost
$150 - $500
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
❌ No
Pro recommended
Your Vehicle
2018 BMW
X5
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Important for 2018 BMW X5 Owners
Before starting repairs, verify which engine your 2018 BMW X5 has. Check your VIN or engine code to ensure you order the correct parts.
📖 What Does C1804 Mean on 2018 BMW X5?
The traction control system has detected a malfunction, which may be caused by a faulty wheel speed sensor, faulty ABS sensor, or a problem with the traction control module.
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Symptoms
- • Loss of traction control
- • ABS light illuminated
- • vehicle may pull to one side
- • reduced acceleration
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Common Causes
- • Faulty wheel speed sensor
- • faulty ABS sensor
- • traction control module failure
- • wiring issues
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How to Fix C1804 on 2018 BMW X5
1. Check and clear any trouble codes. 2. Inspect and clean wheel speed sensors. 3. Replace faulty wheel speed sensor or ABS sensor. 4. Update traction control module software. 5. Check and repair wiring issues.
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Need Maintenance Info for Your X5?
Get oil capacity, filter specs, and torque settings for your specific 2018 BMW X5.
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Related Diagnostic Codes
Other codes that may appear with C1804
C1802
Sequential Code
C1802: Electric Power Steering (EPS) Fault
Medium
C1803
Sequential Code
C1803: Electronic Stability Control (ESC) Malfunction
Medium
C1805
Sequential Code
C1805: Wheel Speed Sensor Malfunction
Medium
C1806
Sequential Code
C1806: Anti-lock Brake System (ABS) Pump Control Module Circuit 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