C1515: Torque Sensor Zero Point Adjustment Undone
3 vehicles · 2 makes · $150-$2,500 repair
Most Reported On
C1515 is an OBD-II diagnostic trouble code meaning “Torque Sensor Zero Point Adjustment Undone.” C1515 is a manufacturer-specific code (Toyota/Lexus) indicating the electric power steering ECU has not had the steering torque sensor zero-point calibration performed. It is not necessarily a hardware failure; rather, the system needs the torque sensor's neutral/zero reference set. Until calibrated, the power steering assist, and sometimes traction and stability control, may be limited or disabled, and steering may feel heavy. It commonly appears after battery disconnection, steering or sensor service, or EPS module work. This code is most commonly reported on 2011-2020 Kia Sorento, 2017-2023 Kia Sportage, and 2006-2015 Mazda MX-5 Miata, with repair costs ranging from $150 to $2,500.
Common Causes
Typical Repair Cost
Based on 3 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose C1515, 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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Vehicles Affected (3)
FAQ
What does C1515 mean?
C1515 stands for "Torque Sensor Zero Point Adjustment Undone." C1515 is a manufacturer-specific code (Toyota/Lexus) indicating the electric power steering ECU has not had the steering torque sensor zero-point calibration performed. It is not necessarily a hardware failure; rather, the system needs the torque sensor's neutral/zero reference set. Until calibrated, the power steering assist, and sometimes traction and stability control, may be limited or disabled, and steering may feel heavy. It commonly appears after battery disconnection, steering or sensor service, or EPS module work.
What are the most common causes of C1515?
The most common causes of C1515 are: Zero-point calibration not performed after service/battery disconnect, EPS module, steering column, or torque sensor replaced without calibration, Faulty or misaligned steering torque sensor, Damaged wiring or connector to the torque sensor, Steering angle/zero reference lost, Low system voltage during calibration attempt. The specific cause varies by vehicle.
How much does it cost to fix C1515?
Repair costs for C1515 range from $150 to $2,500, depending on the vehicle and root cause.
Which vehicles are affected by C1515?
Au7o has documented C1515 across 3 vehicle models from 2 manufacturers: Kia, Mazda.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.