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Also check the tire pressure on the spare tire as it will give you the warning.

 

Old post but today mine started blinking (2004 GX). I checked and sure enough the 2 tires in the back was like 30 PSI. I brought all 5 tires to 35-36 PSI. How long does it take to go off? I went down the block and it still blinking. I heard blinking is a malfunction instead of low tire pressure. I found the switch in main position, I think that's what it's been at.. might switch back and forth and see. But I don't want to keep starting the ignition to check the car so many times hopefully tomorrow after some driving it would go off.

 

It should go off after a couple minutes. Check the spare, it has a TPMS sensor too.

 

yes all tires were pumped up. Drove around long tryig the button and it's not going away. However flashing means something is not working instead of just low pressure. The tire shop at Costco confirmed that. He said probably about time to replace all the sensors for 2004. I think they are about $60 each. I could just do the bad one but if another one goes. Tire shop wait again

Reading the older posts because the car was new (back then) people always try to do some reset or work around. But now it's at the age where they really may need replacing.

 

I think I have just one of my original sensors left. Yes, it's been a pain to get them replaced one at a time. I should have just done them all 2 years ago when I got new tires.

Chip H.