MG ZS (Gen2) Steering Angle Sensor Fault

A Steering Angle Sensor Fault indicates that the Electronic Stability Control (ESC) or Anti-lock Braking System (ABS) Control Module has detected an abnormality in the steering angle sensor or its communication with other vehicle control modules. The steering angle sensor measures the steering wheel’s position, direction, and rate of rotation, providing critical data to the ABS, Electronic Stability Control (ESC), Traction Control System (TCS), Electric Power Steering (EPS), Advanced Driver Assistance Systems (ADAS), and other vehicle stability functions. Accurate steering angle information allows these systems to compare the driver’s intended direction with the vehicle’s actual movement and intervene when necessary to maintain stability. A faulty steering angle sensor can disable multiple safety systems and illuminate several warning indicators. This fault applies to the MG ZS Gen2 (ZS11 platform), introduced from 2024 onwards.

Symptoms

  • Electronic Stability Control (ESC) warning light illuminated
  • ABS warning light illuminated
  • Traction Control System (TCS) warning light illuminated
  • Electric Power Steering (EPS) warning light
  • Lane Keep Assist or ADAS warning messages (where equipped)
  • Steering feels unusually heavy or inconsistent
  • Stability control disabled
  • Traction control unavailable
  • Cruise control may be disabled
  • Multiple chassis system warning messages
  • Steering Angle Sensor-related Diagnostic Trouble Codes (DTCs) stored

Possible Causes

  • Faulty steering angle sensor
  • Steering angle sensor calibration lost
  • Steering angle sensor not initialized after wheel alignment
  • Clock spring (spiral cable) failure
  • Damaged steering column wiring
  • Open circuit in the steering angle sensor circuit
  • Short circuit to ground or battery voltage
  • Loose, damaged, or corroded electrical connectors
  • CAN Bus communication fault
  • Low system voltage affecting sensor operation
  • ABS/ESC Control Module fault
  • Electric Power Steering (EPS) Control Module fault (rare)

Diagnosis

Diagnosis begins by confirming any stored Diagnostic Trouble Codes (DTCs) and reviewing freeze-frame and live data using a compatible diagnostic scan tool. Live data should be monitored to verify steering angle position, steering direction, steering wheel rotation rate, and communication between the Steering Angle Sensor, ABS/ESC module, and Electric Power Steering (EPS) module. The technician should confirm that the steering wheel is correctly centred and determine whether steering angle calibration or initialization has been lost following wheel alignment, steering repairs, suspension work, battery replacement, or module programming. The steering angle sensor, clock spring assembly, steering column wiring, connectors, power supply, and ground circuits should be inspected for physical damage, corrosion, loose terminals, or wiring faults. Circuit continuity, voltage drop, insulation integrity, and resistance tests should be performed where applicable. Manufacturer diagnostic procedures may also include steering angle sensor recalibration, CAN Bus communication testing, ABS and EPS module communication verification, oscilloscope waveform analysis, steering column inspection, and module software updates if required.

For vehicles operating in New Zealand, following OEM diagnostic procedures helps accurately distinguish between a faulty steering angle sensor, lost calibration, clock spring failure, CAN Bus communication issue, Electric Power Steering fault, ABS/ESC module problem, or wiring fault before replacing expensive steering or stability control components.

Accurately diagnosing this fault often requires manufacturer testing procedures, wiring diagrams, steering system schematics, connector pinouts, steering angle sensor specifications, calibration procedures, ABS and ESC diagnostic routines, Electric Power Steering diagnostic information, CAN Bus communication procedures, live data reference values, and system calibration information. Access to the factory service manual significantly reduces diagnostic time and helps prevent unnecessary parts replacement.

Applicable Years

2024, 2025, 2026, onwards

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