C1A00: Stability Control System Fault
2 vehicles · 2 makes · $300-$3,500 repair
Most Reported On
C1A00 is an OBD-II diagnostic trouble code meaning “Stability Control System Fault.” This is a chassis/stability-control code that signals a general fault within the electronic stability control system — the network of sensors and the controller that keep the vehicle from skidding or losing traction during hard cornering or slippery conditions. C1A00 typically means the stability control module detected an internal fault or a problem somewhere in the system it can't fully resolve, so it may disable stability and traction control and turn on the related warning lights. Importantly, C1A00 is a manufacturer-specific code and its precise meaning varies by brand, and the full code often includes additional sub-numbers needed to pinpoint the exact fault. Because it's broad, an accurate diagnosis usually requires a capable scan tool to read the extended code and any companion codes. This code is most commonly reported on 2005-2016 Land Rover Discovery, and 2014-2025 MINI Cooper, with repair costs ranging from $300 to $3,500.
Common Causes
Typical Repair Cost
Based on 2 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose C1A00, 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
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
FAQ
What does C1A00 mean?
C1A00 stands for "Stability Control System Fault." This is a chassis/stability-control code that signals a general fault within the electronic stability control system — the network of sensors and the controller that keep the vehicle from skidding or losing traction during hard cornering or slippery conditions. C1A00 typically means the stability control module detected an internal fault or a problem somewhere in the system it can't fully resolve, so it may disable stability and traction control and turn on the related warning lights. Importantly, C1A00 is a manufacturer-specific code and its precise meaning varies by brand, and the full code often includes additional sub-numbers needed to pinpoint the exact fault. Because it's broad, an accurate diagnosis usually requires a capable scan tool to read the extended code and any companion codes.
What are the most common causes of C1A00?
The most common causes of C1A00 are: Internal stability control module fault, Companion sensor faults (wheel speed, steering angle, yaw/lateral) triggering the system, Wiring, connector or ground problems in the stability control circuit, Low system or battery voltage / charging issue, Module software, calibration or configuration fault, Damaged or unplugged sensor harness after service, Faulty ABS/stability hydraulic control unit (less common). The specific cause varies by vehicle.
How much does it cost to fix C1A00?
Repair costs for C1A00 range from $300 to $3,500, depending on the vehicle and root cause.
Which vehicles are affected by C1A00?
Au7o has documented C1A00 across 2 vehicle models from 2 manufacturers: Land Rover, MINI.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.