wigging

OK, weird chain of events. Need some advice.

Weather got really cold (28 degrees (hey its Houston- thats cold for us) and tire pressure read very low readings. My tires were bald anyway so I went Discount Tire and replaced all four. After I left I reactivated my TPS and it started working and stopped about an hour later. Has not work since. It acts like its working (no malfunctions) then when I go the pressure screen it says (will reappear after driving for a few minutes) but, it never does, and then I get the dreaded "drive to workshop" message that I need to hit R button to reset.

Did Discount Tire mess it up? Was it the weather? I mean it worked fine until that cold snap. I have an 04 CL55 with 27K miles. No issues whatsover other than this.

Thanks for any input as my extended warranty does not cover tire pressure sensors....

leetski

These sensors are not cheap as I understand, maybe the tech. guy stole 'em?

IngenereAMG

I would start at Discount, but more than likely is the batteries in one or more of the TPS are on the way out and need replacing. When I had mine done they ran ~$300/each.

Patentmat

On an '04 you are well into the period of time where they are going to start to go on you. Unfortunately, new batteries means new sensors so get ready for about a thousand bucks.

When they first ran out of juice though, it happened during a tire change. I don't know what it is about taking them out and putting them in again, but it is possible if they were low on life that your tire change just pushed them over the edge.

StarPower

Batteries don't work well when cold, and if they were on their way out anyway the cold was probably the final straw. They might start working again once they warm up, but given the age they're probably at the end of their useful life.

If you're in the habit of checking your own tire pressure and don't want to pay for replacement sensors, a dealership can disable TPMS for you so you don't have to deal with the error messages.

As for the very low readings: The cold will cause the air in your tires to contract, causing your tire pressure to drop. It's a good idea to check your pressure any time you have drastic temperature changes.

wigging

you all have a point- maybe at end of life. Why did they go out all at once though? TPS wont pick up/show any of them. Seems like if one battery went out, my display would show the other three tires still- right? does this make sense?

I may go the TPS disable route if I have to buy new sensors.

StarPower

The cold probably did them in. If it had been warmer, they probably would have failed one at a time. Mine started to give intermittent errors when they were on their way out, but once I drove up North they all failed together.

BVLDARI

mine have been screwing up too. my understanding is that the expected battery life is about 5 years, so your car being an 04 they were probably running on their last breath...