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TPMS Light On Constantly on 2020 RDX - Tires are Fine!

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Jennifer H. · rep 0 · May 22, 4:58 AM · 1 replies · solved · Question

Vehicle: 2020 Acura RDX Advance

My 2020 Acura RDX Advance has had its TPMS light on for about a week now. I've checked all four tires multiple times with a reliable gauge, and they're all at the correct pressure. I even tried resetting the system through the infotainment, but the light just comes back on after a few miles.

Is there a common issue with the TPMS sensors themselves on these RDX models? Could it be a faulty sensor or something more complex? It's annoying to see that warning light all the time.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 4:58 AM

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ClearTheCode admin answer:

It's frustrating when the TPMS light stays on despite correct tire pressure. This usually indicates an issue with the TPMS system itself, not necessarily the tire pressure. Here's a breakdown of potential causes and steps:

  1. TPMS Sensor Battery: Each TPMS sensor inside the wheel has a small battery. These batteries typically last 5-10 years. For your 2020 RDX, it's a bit early, but a faulty battery is still possible, especially if one sensor is failing.
  2. Damaged Sensor: A sensor could have been damaged during a tire rotation, mounting, or by road debris.
  3. Sensor Malfunction: The sensor itself might be faulty and not transmitting data correctly.
  4. TPMS Module Issue: Less common, but the central TPMS control module could be malfunctioning.
  5. Incorrect Sensor ID: If tires or wheels were recently changed, the new sensors might not have been properly programmed or 'relearned' by the vehicle's system.

What to Do:

  • Professional Scan: The most effective step is to take your RDX to an Acura dealership or a tire shop with advanced TPMS diagnostic tools. They can scan each individual sensor to check its battery life, signal strength, and temperature/pressure readings.
  • OBD-II Codes: A professional scan tool can also pull specific TPMS-related diagnostic trouble codes (DTCs) from the vehicle's computer. Common codes might include:
    • C1750 (Front Left Sensor Malfunction)
    • C1751 (Front Right Sensor Malfunction)
    • C1752 (Rear Right Sensor Malfunction)
    • C1753 (Rear Left Sensor Malfunction)
    • C1754 (TPMS Control Unit Malfunction)

When to See a Shop: Since you've already checked pressures and attempted a reset, a professional diagnosis is the next logical step. They can accurately identify which sensor (if any) is at fault and replace or reprogram it. Driving with a persistent TPMS light, even if pressures are correct, means you won't be alerted to an actual low-pressure situation, which is a safety concern.

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