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2004 Chevrolet Tahoe Question: brakes and tire pressure sensor

 

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Visitor, Cincinnati, OH, November 08, 2010, 18:52

will worn brakes make the tire pressure sensor indicate that the pressure is low in the tire? My tire pressure indicator is coming on and staying on but the pressure is fine in my tires......so do you have any idea why I am getting this reading.

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  • Answer #1

    patrick mannion from Greg Solow's Engine Room, November 08, 2010, 19:07
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     Master

    Check all the tire pressures even the spare. Not familiar with Chevy tire pressure monitoring systems but on other cars if tires are rotated the system may indicate the wrong tire to be flat. Some systems monitor the spare. A scan tool reads the pressure, temperature, and battery voltage at each wheel sensor. You may have a bad sensor but a scan tool will be needed to verify which sensor.

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  • Answer #2

    November 08, 2010, 19:09
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     Master

    No, worn brakes will not make the tire pressure sensor read that the tire pressure is low.

    Have you checked all your tires, including your spare? If all are inflated to the plackard recommended presssure usually located on the tire door jam or the gas cap area, then you must have a problem with one of your sensors.

    Brakes operate entirely indepently of the TPMS system. Good luck!

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    Pvt-Public, November 09, 2010, 07:39
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     Master

    TPM Sensor Identification Codes
    Each TPM sensor has a unique identification code. Any time you rotate your vehicle’s tires or replace one or more of the TPM sensors, the identification codes will need to be matched to the new tire/wheel position. Each tire/wheel position is matched to a sensor, by increasing or decreasing the tire’s air pressure. The sensors are matched to the tire/wheel positions in the following order: left front (LF); right front (RF);
    right rear (RR) and left rear (LR). You will have one minute to match the first tire/wheel
    position, and five minutes overall to match all four tire/wheel positions. If it takes longer than one minute, to match the first tire and wheel, or more than five minutes to match all four tire and wheel positions the matching process stops and you will need to start over.
    The TPM sensor matching process is outlined below:
    1. Set the Parking brake.
    2. Turn the ignition switch to RUN with the engine off.
    3. Turn the exterior lamp switch from “Off” to “On” four times within 3 seconds. A double horn chirp will sound and the TPM low tire warning light will begin to flash. The double horn chirp and flashing TPM warning light indicate that the TPM matching process has started. The TPM warning light should continue flashing throughout the
    matching procedure. The SERVICE TIRE MONITOR message will be displayed on the
    Driver Information Center (DIC).
    4. Start with the left (driver’s side) front tire.
    5. Remove the valve cap from the valve cap stem. Activate the TPM sensor by increasing or decreasing the tire’s air pressure for 10 seconds, then stop and
    listen for a single horn chirp. The single horn chirp should sound within 15 seconds, confirming that the sensor identification code has been matched to this tire and wheel position. If you do not hear the confirming single horn chirp, you will need to start
    over with step number one. To let air-pressure out of a tire you can use the pointy end of the valve cap, a pencil-style air pressure gage or a key.
    6. Proceed to the right (passenger’s side) front tire, and repeat the procedure in step 5.
    7. Proceed to the right (passenger’s side) rear tire, and repeat the procedure in step 5.
    8. Proceed to the left (driver’s side) rear tire, and repeat the procedure in step 5.
    9. After hearing the confirming horn chirp for the left rear tire, check to see if the TPM warning light is still flashing. If yes, turn the ignition switch to OFF.
    10. Set all four tires to the recommended air pressure level as indicated on the Certification/Tire label or the Tire and Loading Information label.
    11. Put the valve caps back on the valve stems
    The spare tire does not have a TPM sensor. If you replace one of the road tires with the spare, the CHECK TIRE PRESSURE message will be displayed on the DIC screen. This message should go off once you re-install the road tire containing the TPM sensor.
    The SERVICE TIRE MONITOR message is displayed when the TPM system is malfunctioning. One or more missing or inoperable TPM sensors will cause the
    service tire monitor message to be displayed. See your dealer for service. Not sure if this helps but it is out of the owners manual, you can download one free at:
    http://www.autousermanual.com/view/chevrolet/tahoe/

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