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Re: Tire pressure monitor relearn
That can only be done through the ecm(engine control module) main computer. you have to take it to a shop and have them reprogram the perameters with a scan tool. take it to a small shop it will be cheaper than going to a dealer. hope this helps......please rate this......thanks
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Diane, it is sensing low air pressure in one of the tires, or faulty sensor. check air pressure in tire and fill to specification.
Check the attached links for more info,
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This light comes on when tire pressure is low. Each wheel has individual sensors to monitor tire pressure. You have an issue with one or more of the wheels/sensors. Take it to a reputable repair shop and have the system tested. You may have one or more bad sensors or the vehicle may not have any sensors equipped if the original rims are not installed when you purchased it..
There are two different ways to relearn your Tire Pressure Monitoring System (TPMS). One is with a TPMS scan tool (this is the preferred method) and the other is the manual method (pain in the "you-know what", but requires no special tools or equipment).
To use the manual method, set the parking brake. Enter into TPMS RELEARN using the Driver Information Center (DIC) controls. (SEE Owner's Manual)
When you have successfully entered TPMS RELEARN, the horn will chirp and the left front turn signal will illuminate. Increase or decrease the tire inflation pressure on the left front tire for 8 to 10 seconds. The horn will "chirp", indicating that the left front tire pressure sensor has been relearned and the turn signal at the right front will illuminate. Repeat the process for the right front tire. The horn will chirp and the right rear turn signal will illuminate indicating that the right front tire has been relearned and now you must now repeat the process at the right rear tire. Then you will have to repeat this a fourth time at the left rear. When the left rear tire has been relearned, the horn will sound a "double chirp" indicating that the relearn process has successfully completed. At this time, turn the ignition switch to the OFF position and adjust all of the tire pressures to the specification printed on the tire certification label inside the drivers door/door pillar area.
No.Because the tire pressure monitor is looking for a frequency from the sensors and does not see it.There for the light will stay on constantly.If you have a light that is constantly on and the tire pressures are all fine.Then you need to relearn the tire pressure monitor to make the light go off.Unless you have a bad sensor.There is a special tool for relearning the tire pressure monitor.It also has to be put in learn mode to perform this.Which is done with your keyless entry fob or in your case you apply the parking brake turn the key on and turn the light switch from off to park 4 times within 4 seconds.The horn will chirp twice.this means the system is in learn mode.This is where the special tool comes in.you need to go to a repair shop that has a tool for relearning.If the sensors are all good the light will go off.Hope this has helped.Good luck.
There is a Technical Service Bulletin (TSB) for your vehicle stating that if the light is blinking and if there are dashes (- -) on only one or two tire pressure readings, then the tire presure monitoring system should be put through a "Relearn" or "matching" process. Then if any of the tire pressure sensors do not respond while relearning, the sensor in that tire should be replaced.
The TPMS matching process is outlined below:
1. Set the parking brake. 2. Turn the ignition switch to ON/RUN with the engine off. 3. Go to the TPM vehicle information screen on the DIC. Press set to relearn the sensors. The horn sounds twice to signal the receiver is in relearn mode and Tire Learning Active message displays on the Driver Information Center screen. 4. Start with the driver side front tire. 5. Remove the valve cap from the valve stem. Activate the TPMS sensor by increasing or decreasing the tire's air pressure for 10 seconds, or until a horn chirp sounds. The horn chirp, which can take up to 30 seconds to sound, confirms that the TPMS sensor identification code has been matched to this tire position. 6. Proceed to the passenger side front tire, and repeat the procedure in Step 5. 7. Proceed to the passenger side rear tire, and repeat the procedure in Step 5. 8. Proceed to the driver side rear tire, and repeat the procedure in Step 5. 9. After hearing the confirming horn chirp, for the driver side rear tire, the horn sounds two more times to signal the tire learning mode is no longer active. Turn the ignition switch to LOCK/OFF. 10. Set all four tires to the recommended air pressure level as indicated on the tire and loading information label. 11. Put the valve caps back on the valve stems.
The tires air pressure will not appear on the screen until you start driving the vehicle.
You need to take it to a shop (Tire shops should have the tool) and have your Tire Pressure Monitor system reset. Your vehicle basically knows that the tires aren't where they are supposed to be. Just tell whoever you talk to that you need your tire sensors relearned. They may even do it for free as it will take 5mins or less.
The low tire pressure warning should go out if you set all of the tire pressures to the correct pressure, then drive the vehicle for about a mile. You should not have to "relearn" the Tire Pressure Monitoring System (TPMS) unless the tires are (A.) rotated into different positions or (B.) There is a bad sensor that needs to be replaced.
For more information, you can read the information in your Owner's Manual. Here is a link to a pdf version 2009 Cobalt owners manual. (The information and procedures are the same for 2008 - 2010 Cobalts) The TPMS section starts on page 5-64
You will need to bring it to a dealer or tire service center to see what the problem is.Most of the time it will be a sensor.Sometimes they can be just relearned.Also you may want to check your tire pressures.Make sure they are pressurized to what the pressure says on your door placard.