A scan names “Tyre Pressure Monitoring Control Module J502”, so the next step seems obvious: find a replacement. First establish how tyre-pressure monitoring works on this particular car. The controller name in a fault description does not tell the whole story.
Identify the fitted system
Ross-Tech’s 01325 reference separates direct TPMS with a diagnostic controller from indirect systems whose functions are handled by the ABS. It also distinguishes basic-setting/adaptation faults from communication faults. Coding, low voltage and narrowly applicable software notes appear in its guidance.
Ask the workshop to confirm the factory equipment from vehicle information and the complete scan. Do not add or remove controllers from the configuration just to make a warning disappear.
Keep related faults together
Send the full report rather than a screenshot cropped to 01325. The reference notes that parking-brake faults can also lead to this entry in the ABS. Other warnings may therefore provide useful context instead of being unrelated distractions.
If the issue followed a flat battery, replacement ABS unit or coding session, write that in the enquiry. Include the original and replacement part numbers where available. A before-and-after scan can be especially helpful when the vehicle’s configuration has changed.
A sensible starting point for a repair enquiry
Describe what the display actually does: a permanent warning, missing readings or a warning only after moving. Confirm that tyre condition and pressures have been checked. These observations help keep the investigation focused while the fitted equipment is verified.
Contact AXION with your 01325 report before removing any controller. For an explanation of the separate sensor and vehicle learning steps, see TPMS programming and relearning.
Reviewed September 2026. Use the complete manufacturer-specific fault description and vehicle repair information.