Hey, I got a 2004 xc90 the check engine light came up and on the message board it said "engine system service required"
when I read the error code with obd scanner all of the air pressure sensors registered failure.
(btw I cleaned the sensors and cleared error and it just came right back after 15 minutes)
is it possible for of them to fail simultaneously?
The car is reving like crazy and dragging from a stand still whem the engine is warm , when the engine is cold its pretty good.
Sometimes an "anti skid service required" message comes up after a slow acceleration with high engine revving.
I don't know what to do with this car.

Anyone has any suggestions ?

 

you probably need to do some more diagnostics but the fact that it runs different cold vs warm suggests testing the ECT sensor. CEL codes are just guidance and don't always point directly to the root cause. Most techs understand this and follow a triage process to get to the root of the problem. Could be a sensor, an intake air leak or a vacuum line or the ETM etc setting off a fault code... The anti skid warning typically gets triggered from speed sensors and steering angle sensor disagreeing which would not be something I'd associate to a MAF or boost sensor issue so I'm wondering if you may have a system voltage issue. (check battery voltage before starting up in the AM?)

 

the problem appeared after i replaced a leaking radiator. when i came to pick it up from the radiator garage they actually asked me if i had a check engine light on before , which i didn't, and then they said they "didn't touch the engine at all so it doesn't have anything to do with the work they'd done" ...
I'm just trying to figure out that connectors they may have disconnected to cause a MAF and boost sensor signal error at the same time ...

 

ah. I'm wondering if they may have created an air leak around the hoses to/from the intercooler or one of the controlling vacuum lines. See if those are all in place and securely attached.