← View Generic C1938 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2018 BMW X5

C1938: C1938: Wheel Speed Sensor Malfunction

on 2018 BMW X5

Fix Cost
$100 - $500
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
❌ No
Pro recommended
Your Vehicle
2018 BMW
X5
⚠️

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 C1938 Mean on 2018 BMW X5?

The wheel speed sensor malfunction code indicates a problem with the wheel speed sensor circuit, which can cause issues with the vehicle's anti-lock braking system (ABS) and traction control system.
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Symptoms

  • • ABS warning light on
  • • traction control light on
  • • vehicle may vibrate or pull to one side while braking
  • • reduced braking performance
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Common Causes

  • • Faulty wheel speed sensor
  • • faulty wheel speed sensor wiring
  • • faulty ABS module
  • • faulty brake controller
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How to Fix C1938 on 2018 BMW X5

1. Check wheel speed sensor wiring for damage or corrosion, repair or replace as needed. 2. Check wheel speed sensor for proper installation and securement, reposition or replace as needed. 3. Check ABS module for proper function, replace if faulty. 4. Check brake controller for proper function, replace if faulty.

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Parts for 2018 BMW X5

wheel speed sensor Shop ↗ wiring harness Shop ↗ ABS module Shop ↗ brake controller Shop ↗

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Related Diagnostic Codes

Other codes that may appear with C1938

C1936 Sequential Code

C1936: Electronic Stability Control (ESC) Malfunction

Medium
C1937 Sequential Code

C1937: Traction Control System Malfunction

Medium
C1939 Sequential Code

C1939: ABS System Malfunction

Medium
C1940 Sequential Code

C1940: Brake System Pressure Sensor Circuit 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