I have an interesting problem and need some insight. I got new tires a few weeks ago and finally got around to relearning my tire sensors. My dash shows that LF RF and RR are registering and LR has XXX however when I start the procedure LF is good RF no horn and stuck at that tire. I thought maybe its bad but its registering.So now my panel is reading RR pressure but is actually LR but cant go through the procedure to change it. I waited a few seconds between tries and turned car off, waited the tried again on the RF. Any thoughts?

 

I'd try again and move the magnet around the barrel and around the sensor till it beeps. If it won't get a stronger magnet and try again. You won't read the correct tire positions until you get that RF to program in the right order (second) and then RR, LR. You may just not be activating the sensor with the magnet. As I said, try inside the barrel of the wheel also. It's also possible to have a bad sensor. Could have been broken when the tires were changed.

 

Are your wheels OE or aftermarket. Some aftermarket wheels don't have the sensor as part of the valvestem, so holding the magnet at the valvestem won't activate the sensors....

 

can it be bad and still register tire pressure on the dash? I checked the tire pressure manually and it is the same as the read out on the dash. I have a very strong magnet and it worked for the LF.

 

04 oe

 

If you skipped the lf in the programming because it wouldn't program, now the car "thinks" the rr is the lf and that the lr is the rr. You are going to have to start over and get all the wheels to beep in order. From your description it sounds like the magnet just didn't activate the sensor in the rf. Or the sensor was bad. Just because the DIC says a pressure in the rf, it doesn't mean that's the one it's reading, it depends on the order in which it was programmed.

 

you cant skip a tire so my car only thinks the RR and LR are mixed up because they changed sides when the tires were changed not affected by the relearn. The DIC does not have a pressure read out as you are doing this relearn. When in normal mode the RF has a read out. this indicates working. Then when i perform the relearn it will not pick up that sensor.

 

You can skip a tire. When you program the LF, it beeps, if you then move to the RR and use the magnet, that RR is programmed as the RF because it is second in the order the car sees and so on. What it comes down to is if your RF isn't beeping, either it's a bad sensor, or the magnet hasn't reached the correct position to activate the transmitter in the sensor. Period. Nothing else will cause the other three to beep and not the RF. If you can borrow a sensor from a friend, or park his car right next to yours, when it's time for the right front to beep, it will program his sensor into your car (won't change his program as long as he's not in the program mode on the DIC). That still won't tell you if the sensor is bad or it it's just not being activated by the magnet. As a last resort before you buy a sensor, you could break the tire down and put the magnet against the sensor. If it doesn't beep, you need a sensor. (It sounds like that may be the case anyway). The car doesn't read a position for the sensor, only the order in which you program it places it on a certain wheel position, so you've narrowed it down to the sensor or the magnet portion of the program procedure.

 

I see what your saying. I have only had one tire go through the procedure though i stopped at the second tire because it would not process. I was wondering though is the sensor bad if it is displaying the correct PSI in my DIC? I did not program that tire to a different tire.

 

If that wheel was on the right front and it never was reprogrammed, and it's still reading correct pressure, then the sensor is ok, but not being activated to transmit the signal by the magnet. It really sounds like the other three have been programmed, though not corrrectly. You have to figure some way to get that RF to beep with the magnet or the rears won't be correct either. Try a huge magnet if you can find one, or try a new sensor. I didn't look at what year your car is, but if it's pre 2001 that is fairly expensive. It would be nice if you knew someone to let you program your system using one of their whees/sensors just to troubleshoot. Just park their car with one wheel close to your car and use it as the right front and see if it beeps. Of course, you'll have to reprogram yours afterward, but even if you don't, at least the LF and both rears will read correctly.

 

I've had instances where I've had to try the re-learn process 2-3 times, before I could all the way around the car. In my experience, the RF is always been the hardest to get recognized by the BCM, because it's the furthest from the TPMS receiver, which is in the left side of the luggage compartment.

 

It can be fustrating. Best best is to do before installing on the wheel. After that, as stated above, get a stronger magment and be patient. It took me several tries over a few days the last time I did it,