← View Generic C1991 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2018 BMW X5
C1991: C1991: Steering Column Position Sensor Circuit Malfunction
on 2018 BMW X5
Fix Cost
$100 - $300
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 C1991 Mean on 2018 BMW X5?
The C1991 code indicates a problem with the steering column position sensor circuit, which helps the vehicle's computer determine the steering wheel's position and angle.
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Symptoms
- • Steering wheel feels loose or unresponsive
- • difficulty turning the wheel
- • unusual steering vibrations
- • or the 'check engine' light comes on.
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Common Causes
- • Faulty steering column position sensor
- • wiring issues
- • or a problem with the sensor's electrical connection.
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How to Fix C1991 on 2018 BMW X5
1. Disconnect the battery to reset the system. 2. Check and clean the sensor's electrical connection. 3. Replace the steering column position sensor if faulty.
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Need Maintenance Info for Your X5?
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Related Diagnostic Codes
Other codes that may appear with C1991
C1989
Sequential Code
C1989: Brake System Pressure Sensor Circuit Malfunction
Medium
C1990
Sequential Code
C1990: Suspension Damper or Mount Fault
Medium
C1992
Sequential Code
C1992: Electronic Stability Control (ESC) Malfunction
Medium
C1993
Sequential Code
C1993: Traction Control 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