The TPMS light on the Acura MDX signals that one or more tires may be underinflated or that the tire pressure monitoring system has a fault.
In practice, you should check the tire pressures against the vehicle’s recommended values printed on the door jamb sticker and inflate to that specification. If the light stays on after inflation or if it blinks, there may be a sensor issue or other system fault that requires service.
Understanding how the TPMS works on the MDX
What the light looks like
On most MDX dashboards, the TPMS indicator appears as a tire icon with an exclamation point inside or a related warning symbol such as “TPMS.” The color amber is a warning, not a danger signal. A solid light generally points to underinflation, while a blinking light suggests a TPMS fault or calibration issue.
Common causes that trigger the TPMS light
These are the most frequent reasons the warning may illuminate:
- One or more tires are underinflated below the recommended pressure
- Recent changes to tires or pressures (rotation, replacement, or air loss) requiring a reset
- A faulty tire pressure sensor or a depleted sensor battery in one wheel
- A TPMS calibration or relearn is needed after service
- A TPMS control module or associated wiring fault
In short, underinflation is the most common trigger, but sensor or system faults can also cause the light to come on. If the light behaves unusually (e.g., blinking) or remains on after addressing pressure, it’s a sign to seek professional diagnosis.
What to do when the TPMS light comes on
Follow these steps to respond safely and accurately:
- Check all four tire pressures with a reliable gauge
- Inflate each tire to the manufacturer’s recommended PSI found on the door jamb sticker or in the owner's manual
- Inspect tires for leaks, cuts, or damage and look for objects lodged in tread
- After inflating to the correct pressure, drive for a few miles to allow the system to relearn; if the light turns off, you’re likely back to normal
- If the light remains on, or if it blinks, arrange service to inspect sensors, the TPMS battery, or the control module
Note: If you recently rotated or replaced tires, a TPMS reset or relearn procedure may be required. Check the owner’s manual or consult a dealer for the exact steps for your MDX year and trim.
Tire pressure monitoring system calibration and maintenance
Most recent MDX generations use a direct TPMS with wheel-mounted sensors. After tire service, you may need to perform a calibration or relearn procedure to synchronize the sensors with the vehicle’s ECU. Procedures vary by model year and trim, so refer to the owner’s manual or contact a dealer for precise instructions.
Summary
The MDX’s TPMS light is a tire-pressure and system-warning indicator. Start by checking and correcting tire pressures to the recommended specification, then monitor the light. If it stays on or blinks after inflation or after a tire service, have the system inspected for sensor or electrical faults. Regular maintenance helps ensure tire safety, performance, and fuel efficiency.