C0031 on 2014-2021 Ford Transit Connect — Left Front Wheel Speed Sensor Circuit
1 vehicles · 1 makes · $120-$650 repair
Most Reported On
C0031 is an OBD-II diagnostic trouble code meaning “Left Front Wheel Speed Sensor Circuit.” C0031 is a chassis/brake code indicating a fault in the left front wheel speed sensor circuit. The ABS module relies on this sensor to measure individual wheel rotation for anti-lock braking, traction control, and stability control; when it detects an open, short, or implausible signal it sets this code. The ABS, traction control, and stability control warning lights typically illuminate and those systems may be temporarily disabled, while normal (non-ABS) braking usually still works. This code is most commonly reported on 2014-2021 Ford Transit Connect, with repair costs ranging from $120 to $650.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose C0031, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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FAQ
What does C0031 mean?
C0031 stands for "Left Front Wheel Speed Sensor Circuit." C0031 is a chassis/brake code indicating a fault in the left front wheel speed sensor circuit. The ABS module relies on this sensor to measure individual wheel rotation for anti-lock braking, traction control, and stability control; when it detects an open, short, or implausible signal it sets this code. The ABS, traction control, and stability control warning lights typically illuminate and those systems may be temporarily disabled, while normal (non-ABS) braking usually still works.
What are the most common causes of C0031?
The most common causes of C0031 are: Failed left front wheel speed sensor, Damaged sensor wiring or chafed harness, Corroded or loose sensor connector, Damaged or contaminated tone/reluctor ring (metal debris, rust), Excessive sensor-to-ring air gap or wheel bearing play, ABS control module fault. The specific cause varies by vehicle.
How much does it cost to fix C0031?
Repair costs for C0031 range from $120 to $650, depending on the vehicle and root cause.
Which vehicles are affected by C0031?
Au7o has documented C0031 across 1 vehicle models from 1 manufacturers: Ford.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.