A TPMS Fault Message on the 2017 MG ZS indicates that the Tyre Pressure Monitoring System (TPMS) has detected a malfunction that prevents it from accurately monitoring tyre pressures. Unlike a low tyre pressure warning, a TPMS fault signifies a problem within the monitoring system itself rather than necessarily indicating an under-inflated tyre. The TPMS uses pressure sensors integrated into each wheel valve to transmit tyre pressure data via radio frequency to the vehicle’s control module.

If communication is lost, a sensor battery fails, or the TPMS control system detects an internal fault, the instrument cluster displays a TPMS Fault message and stores one or more Diagnostic Trouble Codes (DTCs).

MG documentation also notes that TPMS sensors, receiver modules, or related components may require programming or a self-learning procedure after replacement.

Symptoms

• TPMS Fault message displayed on the instrument cluster
• TPMS warning light illuminated or flashing
• Tyre pressure readings unavailable or inaccurate
• One or more tyres not reporting pressure
• Intermittent TPMS operation
• Warning remains after adjusting tyre pressures
• Diagnostic Trouble Codes stored in the TPMS control module
• Tyre Sensor Battery Low message may also be displayed
• TPMS warning returns shortly after clearing fault codes

Possible Causes

The fault may be caused by a failed tyre pressure sensor, depleted TPMS sensor battery, damaged valve-mounted sensor, TPMS receiver module malfunction, damaged antenna or radio frequency communication circuit, incorrect or incompatible replacement sensor, TPMS programming or relearn not performed after sensor replacement or tyre rotation, damaged wiring harness, loose or corroded electrical connectors, blown fuse, low battery voltage, Body Control Module (BCM) communication faults, or CAN Bus communication issues. Radio-frequency interference and non-approved tyres or wheels may also temporarily affect TPMS operation.

Diagnosis

Diagnosis begins by connecting a professional diagnostic scan tool capable of accessing the TPMS control module to retrieve all stored Diagnostic Trouble Codes. Live data should be reviewed to identify which tyre sensor has stopped transmitting or is reporting invalid pressure or temperature information. Freeze-frame data should also be analysed to determine the operating conditions when the fault was detected.

A TPMS fault message is not always caused by a failed pressure sensor. Technicians typically verify the condition and pressure of all tyres before checking for damaged valve-mounted sensors, depleted sensor batteries, incorrect replacement sensors, radio frequency communication issues, and wiring or connector faults. If tyres have recently been rotated or sensors replaced, the TPMS relearn or programming procedure should be completed using an OEM-compatible diagnostic tool, as the system may require sensor registration or self-learning before normal operation is restored.

If the sensors and communication circuits operate within specification, further diagnosis should include the TPMS receiver module, Body Control Module (BCM), instrument cluster communication, power and ground circuits, and the CAN Bus network. Access to OEM wiring diagrams, connector pinouts, TPMS programming procedures, sensor identification data, component locations, and manufacturer diagnostic flowcharts is essential for accurate fault isolation. Following the OEM troubleshooting workflow helps identify the root cause efficiently while avoiding unnecessary replacement of TPMS sensors or control modules.

Recommended Resources

OEM Service and Repair Manual

The OEM Service and Repair Manual is the most reliable resource for diagnosing and repairing TPMS faults. It typically includes:

• Diagnostic procedures for TPMS faults
• TPMS wiring diagrams and circuit descriptions
• TPMS sensor testing procedures
• TPMS sensor registration and relearn procedures
• TPMS receiver module diagnostics
• Body Control Module communication diagnostics
• Connector pinout information
• Component locations and removal procedures
• OEM troubleshooting workflows
• Repair specifications and electrical testing procedures

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