C1011: Left Front Wheel Speed Sensor Signal Erratic Performance
2 vehicles · 2 makes · $80-$4,000 repair
Most Reported On
C1011 is an OBD-II diagnostic trouble code meaning “Left Front Wheel Speed Sensor Signal Erratic Performance.” C1011 is a chassis/manufacturer-specific ("C") trouble code most commonly defined (on Chrysler, Dodge, and Jeep) as erratic or out-of-range signal from the left front wheel speed sensor used by the ABS/traction-control system. It sets when the ABS module detects implausible acceleration/deceleration patterns or a faulty signal from that sensor, which can disable ABS, traction control, and stability control. Note that on some other makes (e.g., Mercedes-Benz) the same code number refers instead to an ASR/ETS/ESP hydraulic-unit power-supply circuit fault, so confirm against the specific vehicle. This code is most commonly reported on 2008-2017 Volkswagen Scirocco, and 2015-2023 Ram 1500 (Big Horn, Laramie, Rebel, Limited), with repair costs ranging from $80 to $4,000.
Common Causes
Typical Repair Cost
Based on 2 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose C1011, 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 C1011 mean?
C1011 stands for "Left Front Wheel Speed Sensor Signal Erratic Performance." C1011 is a chassis/manufacturer-specific ("C") trouble code most commonly defined (on Chrysler, Dodge, and Jeep) as erratic or out-of-range signal from the left front wheel speed sensor used by the ABS/traction-control system. It sets when the ABS module detects implausible acceleration/deceleration patterns or a faulty signal from that sensor, which can disable ABS, traction control, and stability control. Note that on some other makes (e.g., Mercedes-Benz) the same code number refers instead to an ASR/ETS/ESP hydraulic-unit power-supply circuit fault, so confirm against the specific vehicle.
What are the most common causes of C1011?
The most common causes of C1011 are: Faulty or failing left front wheel speed sensor, Damaged, corroded, or loose sensor wiring/connector (open or short in signal or supply line), Excessive air gap between the sensor and the tone/reluctor ring, Damaged, contaminated, or missing teeth on the tone (reluctor) ring, Worn or loose front wheel bearing/hub causing erratic readings, Defective ABS/traction-control control module. The specific cause varies by vehicle.
How much does it cost to fix C1011?
Repair costs for C1011 range from $80 to $4,000, depending on the vehicle and root cause.
Which vehicles are affected by C1011?
Au7o has documented C1011 across 2 vehicle models from 2 manufacturers: Ram, Volkswagen.
Sources (5)
- ForumABS ESP Fault - Scirocco Central
- ForumABS light, traction control, handbrake flashing and beeping! - Scirocco Central
- ForumComplete Power Steering Failure — 5thGenRams Forum
- ForumEPS - Electric Power Steering Problem — Ram 1500 Diesel Forum
- TSBNHTSA Recall 15V-800 / Safety Recall R63 — EPS Unit Circuit Board Contamination (2015-2016 1500)
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.