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2020 Wrangler JL TPMS Light On - Sensor Issues?

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Mike T. · rep 0 · May 22, 3:26 AM · 1 replies · solved · Question

Vehicle: 2020 Jeep Wrangler JL Rubicon

My 2020 Jeep Wrangler JL Rubicon has had its TPMS (Tire Pressure Monitoring System) light on for a few days now. I checked all the tire pressures manually, and they're all correct and within spec. I even tried over-inflating and then deflating them back to spec, and driving around, but the light won't go off.

Is this a common issue with the JLs? Could one of the sensors have gone bad already? I haven't hit any major potholes or anything that would damage a wheel or tire. Any advice on how to reset it or if I need new sensors?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 3:26 AM

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ClearTheCode admin answer:

It's frustrating when the TPMS light stays on despite correct tire pressures. This is a fairly common issue across many modern vehicles, including the Jeep Wrangler JL, and usually points to a sensor malfunction rather than an actual pressure problem.

Possible Causes:

  • Dead TPMS Sensor Battery: Each sensor has a small, non-replaceable battery. Over time (typically 5-10 years), these batteries die, causing the sensor to stop transmitting.
  • Damaged Sensor: While you haven't hit anything major, sensors can be damaged during tire rotations, mounting, or by corrosion.
  • Sensor Malfunction: Sometimes a sensor simply fails electronically without physical damage or a dead battery.
  • TPMS Module Issue: Less common, but the TPMS control module itself could be faulty, or there might be an issue with its antenna.

Troubleshooting Steps:

  1. Scan for TPMS Specific Codes: A standard OBD-II scanner might not read TPMS codes. You'll need a more advanced scanner or a dedicated TPMS tool to read codes like C1501 (Tire Pressure Sensor 1 Malfunction) or similar, which will often tell you exactly which sensor is at fault.
  2. Check Spare Tire: Ensure your spare tire also has correct pressure, as some systems monitor it.
  3. Try a Hard Reset (Battery Disconnect): Disconnect the negative battery terminal for 15-30 minutes. This can sometimes reset modules and clear minor glitches. Reconnect and drive for a bit.
  4. Professional TPMS Scan: A tire shop or dealership can use a specialized TPMS tool to 'wake up' and test each sensor individually, confirming if it's transmitting and what its battery life is.

When to See a Shop:

If the light persists after checking pressures and a battery reset, it's highly likely one or more sensors need replacement. A tire shop or dealership can diagnose which sensor is faulty and replace it. After replacement, the new sensor will need to be programmed or 'relearned' to the vehicle's TPMS module, which usually involves driving or using a specific tool.

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