Help;
My 2006 s60 enters limp mode and I get a reduced engine performance warning. I seem to have it narrowed down to when I hit a large bump in the road. It doesnt throw any code, so the mechanic is having difficulty locating the problem. It is likely a loose connection someplace. I would appreciate any replies from people who have had similar problems. Thanks

 

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 like 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.