C1515 on Mazda
Torque Sensor Zero Point Adjustment Undone
C1515 on Mazda vehicles indicates torque sensor zero point adjustment undone. Au7o has documented this code across 1 Mazda model — most commonly on MX-5 Miata. 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. Typical repair costs on Mazda range from $200 to $1,200, depending on the specific model and root cause.
Common Causes of C1515
- •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
C1515 on Mazda by Model
Mazda MX-5 Miata(1 issue)
- Electric Power Steering (EPS) Failure and Warning Light (NC)2006-2015
The NC Miata uses an electric power steering system that can fail due to a faulty steering angle sensor, EPS control module, or motor. When the system fails, the EPS warning light illuminates and power assist is lost, making the steering very heavy at low speeds. While the car remains drivable (it is manual rack-and-pinion underneath), parking and tight maneuvers become difficult.
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What does C1515 mean on Mazda?▼
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. On Mazda specifically, this code is documented across 1 model.
What causes C1515 on Mazda vehicles?▼
Common causes on Mazda: 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. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix C1515 on a Mazda?▼
Repair costs on Mazda range from $200 to $1,200, depending on the specific model and root cause.
Which Mazda models have C1515 documented?▼
Au7o has documented C1515 on 1 Mazda model: MX-5 Miata.