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2020 Wrangler JL - TPMS Light On, False Readings After Tire Rotation

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Sarah K. · rep 0 · May 22, 3:27 AM · 1 replies · solved · Question

Vehicle: 2020 Jeep Wrangler JL Sahara

Hey all,

I've got a 2020 Jeep Wrangler JL Sahara, and I'm having a persistent issue with my TPMS (Tire Pressure Monitoring System). I recently had my tires rotated at a local shop, and ever since then, the TPMS light has been on. The weird thing is, the dash display shows wildly inaccurate pressures, like 10 PSI in one tire and 80 PSI in another, even though I've checked them manually with a gauge and they're all at 37 PSI.

I've tried driving it for a while, hoping it would reset, but no luck. I also tried the 'air down and air up' trick, but that didn't work either. Is it possible the sensors got damaged during the rotation, or maybe they just need to be reprogrammed? It's really annoying having that light on all the time.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 3:27 AM

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ClearTheCode admin answer:

It's common for TPMS systems to act up after tire rotations, especially if the system isn't properly reset or if the sensors are older. The wildly inaccurate readings suggest a communication issue rather than just a low pressure warning.

Here's a breakdown of potential causes and solutions:

  1. TPMS Sensor Relearn Procedure:

    • Many modern Jeep TPMS systems are 'auto-learn' and should eventually pick up the new positions after driving for 10-20 minutes above 15-20 mph. However, sometimes this process fails.
    • Manual Reset (if applicable): Check your owner's manual for a specific reset procedure. Some vehicles have a reset button, though many newer Jeeps rely on the auto-learn.

  2. Sensor Damage or Failure:

    • It's possible a sensor was damaged during the tire rotation, especially if the technician wasn't careful. The valve stem is often where the sensor is located.
    • Sensors also have internal batteries that can die, typically lasting 5-10 years. While your 2020 is relatively new, a faulty sensor is still a possibility.

  3. TPMS Module Issue:

    • Less common, but the TPMS control module itself could be malfunctioning, leading to incorrect data interpretation.

  4. Interference:

    • Rarely, strong electromagnetic interference can temporarily disrupt TPMS signals, but this is usually transient.

Diagnostics:

  • A professional shop can use a specialized TPMS scan tool to 'wake up' and read each sensor individually. This tool can confirm if the sensors are transmitting, what their IDs are, and if they are reporting correct pressure. It can also be used to perform a forced relearn.
  • Look for codes like C1501-C1504 (Tire Pressure Sensor Internal Fault) or C151D (Tire Pressure Sensor Communication Failure).

When to See a Shop: Since you've tried the basic driving and air pressure adjustments without success, it's highly recommended to take your Wrangler back to the shop that performed the rotation, or to a reputable tire shop or Jeep dealership. They have the necessary TPMS tools to diagnose which sensor (if any) is faulty or to perform a proper system relearn. Driving with an inaccurate TPMS can be a safety concern, as you won't be alerted to actual low tire pressure.

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