Tcs, tcs off, and abs light
 

I have a 2000 millenia 2.5l. I started it up yesterday and my tcs, tcs off, and abs lights all stayed on. I don't notice a performance difference but I'm unsure of what kind of damage it may cause. Any advice on what I should look for? I have seen some posts that mention a vaccum leak but I'm unsure what that has to do with my braking system?

when the car is started, the control unit does a series of self tests, and these are repeated during the drive cycle. if it sees a problem with the abs, then it disables it. when abs is disabled, traction control(tcs) is too, since the system needs to read off the abs sensors. start with simple fixes, like disconnect/reconnect each sensor. at the same time, examine the pickup end, which might have gotten damaged. however, if there was physical damage, the lites would have immediatly illuminated.

Hello guys, first post here but have already benifited from some info today (Found a bad vacuum line related to a P0304 fault after reading some of the forum).

I am checking the wifes Millenia which is also having the same issue with the ABS and TCS lights. They come on and stay on as soon as I start the car. I have metered both sensors on the front and get transition when moving the tires which indicates to me that is not the cause.

I have also read that the ABS light may come on after a jump start due to a low battery. I have 12.2 on the battery. Any chance that it is the battery or and alternator issue? She has been off work for a while and not driing much since school ended. My next guess would be a harness problem and I have no idea where to check.

Thanks for any help and thanks for the info already provided.

my 2002 mellenia s has similar issue. tcs, tcs off, and abs lights turn on but only when reaching 80mph. do not notice any performance loss and lights shut off after restart. still have not figured it out