Nickc0844

So last week, the tire pressure monitoring system kept coming on in the morning when the tires were cold. I assumed it was because tire pressure was at 29 psi, when I typically run 33 all around (per my dealership). It is an 03' E-500.

Directly after filling them, I now get an error (for 3 days now) saying that the tpms needs to be reactivated.

Is this something that needs to be done by the service dept., or can it be done manually? I've only had the car for 5 months, so this is the first time I've ran into it.

Thank you for the suggestions,

Nick

Barry45RPM

After adding/losing a lot of air, the system needs to be reactivated. I think its making sure that you didn't dismount the tires from the rims & move the rims around, so that when it reports the location & pressure of the tire, it knows what wheel position the transmitter is located on on the car, & displays it properly on the dash. (You might have rotated the tires, for instance.)

With the tire pressure graphic on the display, you press the R button on the cluster, it will ask you Reactivate? & then you press "+" for yes. Then you drive around for about 7-10 minutes & the pressures will reappear.

Yeah, I'm gonna miss that feature. I'm too old & crotchety to bend over & check tire pressures weekly anymore.

Nickc0844

Thank you again sir, works like a dream!