MG ZS (ZS11) C1515 Steering Angle Sensor Not Calibrated

Diagnostic Trouble Code (DTC) C1515 indicates that the Electric Power Steering (EPS) Control Module or Electronic Stability Control (ESC) system has detected that the Steering Angle Sensor (SAS) has not been calibrated or that its zero-point calibration has been lost. The Steering Angle Sensor continuously reports the steering wheel position to the ABS, ESC, Traction Control System (TCS), and Electric Power Steering (EPS) modules. If the zero position is invalid or calibration has not been completed after repairs, battery disconnection, wheel alignment, or steering component replacement, the control module stores DTC C1515 and may disable stability control and steering assistance functions until calibration is successfully completed. Similar C1515 implementations on EPS-equipped vehicles identify a missing zero-point calibration rather than a hardware failure.

This fault applies to the MG ZS (ZS11 First Generation), produced from 2017 to 2024, including facelift models.

Symptoms

• Power Steering warning light illuminated
• ESC warning light illuminated
• Traction Control warning light illuminated
• ABS warning light may illuminate
• Steering Angle Sensor calibration warning displayed
• Reduced or disabled power steering assistance
• Steering wheel not centred after wheel alignment
• Stability Control unavailable
• Multiple warning messages displayed
• Steering and ABS-related Diagnostic Trouble Codes (DTCs) stored

Possible Causes

• Steering Angle Sensor calibration not performed
• Steering wheel not centred following wheel alignment
• Battery disconnected causing calibration loss
• Steering rack replaced without recalibration
• Steering column replaced without calibration
• Clock spring replaced or incorrectly installed
• Faulty Steering Angle Sensor
• Faulty Electric Power Steering (EPS) module
• Damaged steering column wiring harness
• Loose or corroded electrical connectors
• CAN Bus communication fault
• Low battery voltage

Diagnosis

Diagnosis begins by retrieving all stored Diagnostic Trouble Codes (DTCs) from the Electric Power Steering (EPS), ABS/ESC, and Engine Control Module (ECM) using an OEM-compatible diagnostic scan tool. Live data should be reviewed to verify that the steering angle changes smoothly throughout the steering range and returns to approximately 0° when the front wheels are pointing straight ahead. If C1515 is present without any additional steering or communication faults, the Steering Angle Sensor should be recalibrated before replacing components. Similar EPS systems identify this DTC when zero-point calibration has not been completed.

The technician should verify that the steering wheel is correctly centred and that the wheel alignment is within specification. The steering angle sensor, clock spring assembly, steering column wiring harness, electrical connectors, power supplies, and ground circuits should be inspected for damage, corrosion, loose terminals, or water intrusion. If the calibration procedure cannot be completed successfully or the DTC immediately returns after repeated calibration attempts, the Steering Angle Sensor, steering column assembly, EPS module, and associated wiring should be tested according to OEM diagnostic procedures before replacing any components.

For vehicles operating in New Zealand, following OEM diagnostic procedures helps accurately distinguish between a calibration issue, faulty Steering Angle Sensor, clock spring fault, steering column problem, EPS module failure, or wiring defect before replacing expensive steering system components.

Accurately diagnosing this fault often requires manufacturer testing procedures, wiring diagrams, connector pinouts, steering angle sensor specifications, steering column schematics, Electric Power Steering (EPS) diagrams, ABS/ESC communication layouts, CAN Bus network diagrams, live data reference values, software calibration information, steering angle sensor zero-point calibration procedures, and system initialization procedures. Access to the factory service manual significantly reduces diagnostic time and helps prevent unnecessary parts replacement.

Applicable Years

2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024

To order the correct OEM Service and Repair Manual for your MG ZS (ZS11), submit your request using the form below and our team will provide the ordering details.