JeepJeepster
Full Access Member
I imagine very few Liberty's still have a working TPMS, but I thought I would post this for those that many need it. Many years ago, I replaced the factory sensors with the 20028 Schrader TPMS sensors and all was well. Had no issues training them with the magnet and they lasted many years. Recently one of them simply died, no low battery or anything. The Jeep kept thinking I had replaced the tire with the spare and would show its pressure, which I keep around 40 PSI. When I tried to buy another 20028 sensor, I discovered they had been replaced with the 29227 sensor which looks completely different. They are fairly cheap from Rockauto, so I grabbed two just to have a spare.
I replaced the sensor but could not get it to train with the magnet. I have an Autel scanner which lets me access the overhead console and I could see the original sensors, but it wouldn't let me reprogram the new sensor. Not sure if that's just a limitation of the Autel or what... Anyway, after thinking about it, I decided to use the Autel to trigger the new sensor while programming the sensors like you normally would with the overhead console. Sure enough, the new sensors cannot be programmed with the magnet, you must use some sort of scanner to trigger the sensors. Could not find this on Schrader's website.
I replaced the sensor but could not get it to train with the magnet. I have an Autel scanner which lets me access the overhead console and I could see the original sensors, but it wouldn't let me reprogram the new sensor. Not sure if that's just a limitation of the Autel or what... Anyway, after thinking about it, I decided to use the Autel to trigger the new sensor while programming the sensors like you normally would with the overhead console. Sure enough, the new sensors cannot be programmed with the magnet, you must use some sort of scanner to trigger the sensors. Could not find this on Schrader's website.
