C0500 on 2019-2022 Cadillac XT4 (AWD) — Left Front Wheel Speed Sensor Circuit Open
1 vehicles · 1 makes · $400-$2,500 repair
Most Reported On
C0500 is an OBD-II diagnostic trouble code meaning “Left Front Wheel Speed Sensor Circuit Open.” The Electronic Brake Control Module monitors the left front active wheel speed sensor circuit and sets C0500 when it detects an open in that circuit — no valid current-modulated signal returning from the sensor. GM groups it with C0501 (range/performance), C0502 (short to ground), C0503 (short to battery) and C0504 (erratic/intermittent) as the left-front set within the C0500-C0516 wheel speed sensor family. Losing a wheel speed input causes the EBCM to disable ABS, traction control and StabiliTrak, and because those wheel speeds are broadcast on the serial data bus, downstream systems that consume them (including AWD and driveline controllers) will also drop out and post their own messages. This code is most commonly reported on 2019-2022 Cadillac XT4 (AWD), with repair costs ranging from $400 to $2,500.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
This is a chassis code. A basic engine-code reader will not show it — you need a scanner that reads chassis modules. These read C0500.
One caveat that applies to every scanner: only powertrain codes are standardised across manufacturers. Body, chassis and network coverage is "enhanced" diagnostics, and how deep it goes varies by make and model year — check your specific vehicle against the tool's coverage list before buying.
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level tablet with all-system coverage and bi-directional control, so you can command a module rather than only read it.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
What you can do yourself, and what needs a shop
Reading the code, clearing it, and watching whether it returns is a driveway job with the right scanner. These steps are not:
- Module programming or software updates — needs the manufacturer software or a J2534 pass-through with a paid subscription.
- Replacing a control module — most are VIN-programmed and immobilizer-registered, so a new one does nothing until it is coded to your car.
- Airbag/SRS component work — a stored fault can deploy a live device.
If the vehicle is still under warranty, check for an open recall or technical service bulletin before buying anything — the repair may already be covered.
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FAQ
What does C0500 mean?
C0500 stands for "Left Front Wheel Speed Sensor Circuit Open." The Electronic Brake Control Module monitors the left front active wheel speed sensor circuit and sets C0500 when it detects an open in that circuit — no valid current-modulated signal returning from the sensor. GM groups it with C0501 (range/performance), C0502 (short to ground), C0503 (short to battery) and C0504 (erratic/intermittent) as the left-front set within the C0500-C0516 wheel speed sensor family. Losing a wheel speed input causes the EBCM to disable ABS, traction control and StabiliTrak, and because those wheel speeds are broadcast on the serial data bus, downstream systems that consume them (including AWD and driveline controllers) will also drop out and post their own messages.
What are the most common causes of C0500?
The most common causes of C0500 are: Open or high-resistance in the left front wheel speed sensor signal or supply circuit — chafed harness at the strut/knuckle routing is the classic failure point, Failed left front wheel speed sensor, Corroded or water-intruded sensor connector, Damaged or contaminated magnetic encoder ring in the front hub/bearing assembly, or an excessive sensor-to-ring air gap, Loose or corroded EBCM connector terminals. The specific cause varies by vehicle.
How much does it cost to fix C0500?
Repair costs for C0500 range from $400 to $2,500, depending on the vehicle and root cause.
Which vehicles are affected by C0500?
Au7o has documented C0500 across 1 vehicle models from 1 manufacturers: Cadillac.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.