Reduced engine performance
 

I was driving my car an it was running great. All of a sudden it had no power an was jerking an wouldn't go over 15mph I turned it off an back on still no help. What could this be? I am going to try to get it scanned tomorrow however I don't want to drive iT with my kids in the car of it isn't safe? Any suggestions or tips?

I believe it is a 06 s40

turbo or non? If its a turbo, take a look to see if any of the intake air tubes (ie from the turbo to intercooler to MAF etc) have slipped off or torn. Did the car present a check engine light? (I'm assuming yes as you said you're planning to get it scanned).

On our '04 XC90 2.5T with cruise set to ~70mph, hit bump on highway and engine reverted to Reduced Performance (limp) Mode with flashing light. Pulled off to side of highway and shut down motor. Problem is gone upon restart. This has happened 3x over past 3 or 4 years. Only occurs with cruise control on. Seems that hitting bump at highway speed is affecting a connection (electronic, intake or other) but during call to dealer, seemed like they had never dealt with it. Have not taken in for service, as have been waiting for more of a hard fail to troubleshoot. By my visual inspection, nothing appears to be loose or out of place. Does anyone have any ideas on how to correct? Thanks in advance.