2004 S40 "over voltage pull over safely" ground issue?

dw1003 · Post by **dw1003** » 16 Jan 2014, 21:41

Tonight I received a "over voltage pull over safely" message.

Here's what's been going on:

There has been an intermittent buzz from the drivers side rear door tweeter.
Upper module that controls the sunroof doesn't work (sunroof won't open and the indicator light in that upper module does not work)

To me it seems like there is a ground issue with car, as that intermittent buzz from that tweeter seems to
correspond with other actions taking place in the car (shifting, braking, hard turns etc) but it is not predictable.

My question... is this "over voltage" message likely to be caused by a ground issue or a bad alternator/regulator/Battery?

also if anyone has any experience with an 'over voltage' message I'd love to hear about it...
thanks,

Daniel

dw1003 · Post by **dw1003** » 16 Jan 2014, 21:47

also every time the "over voltage" message appears that rear drivers side door tweeter buzzes.

dw1003 · Post by **dw1003** » 16 Jan 2014, 21:49

also the message appears momentarily and then goes away, if it's a problem with the alternator or battery wouldn't the message remain on?

Post by **jimmy57** » 16 Jan 2014, 22:06

Overvoltage as a message there is for supply voltage being too high. This is a voltage regulator issue. The VOltage regulator may not be available and you may have to replace the alternator to address this.

dw1003 · Post by **dw1003** » 16 Jan 2014, 22:23

I am taking it to my mechanic tomorrow.

I didn't see any other signs of an alternator problem. No flickering lights, car started fine etc

are there any signs (besides the message) that the alternator or regulator may be going bad?

jenkinskg · Post by **jenkinskg** » 06 Jun 2017, 10:41

My 04 s60 had no sunroof function
Removed alarm plug all good now