Hi,

Getting this code P0121 and Message "Engine system service urgent". It only comes when the Engine is hot or I drove over 50KM. If engine is cold and start in the morning, no such code until I reach my destination and start immediately. Google tells its about "TPS/Pedal"

Else no issues on drive - Same as before. Anyone can help to the right direction and my main concern is why it only comes when engine is warm and only starting. Plus some time it comes and some times not

Car: Volvo s80 1999 2.9 Non Turbo with 130K miles on it. .

Kindly advise.

 

Sounds like your ETM (electronic throttle mechanism) is acting up and has a contact going bad or a solder joint needing fixing. I'd first try cleaning the throttle body but after that you may need to have the ETM repaired (visit Xemodem's web site). Plenty of posts on ETM problems and diagnosis. Not sure if your year/model has a software update bulletin or not but it may be worth a call to a dealer to find out for your VIN

 

Thanks for the reply mt6127,

Error came after I cleaned ETM but while putting back Air hose (Coming from Filter to ETM) I cleaned it with water and dried too but I do not know if any of moist or something made it troublesome.

Does update can solve such problem?

 

I found that you can have etm problems because of moisture in the connection to the wire harness.... spray it with some contact cleaner and use some dielectric grease and see if that solves you problem.... If not it may be cheeper to pull an etm out of a junked s80 as a new etm can run over 300bucks USD before programming

 

There is a place in canada that does a rebuild on the throttle.
Try contacting cores@xemodex.com .
I had trouble with my 2001 model S80 to years ago. Did a replacement my self with one from them. Started first go did not need reprogramming .
I have not had trouble since.