I have checked for vacuum leaks, IM O-rings replaced, breather is new ribbed, vacuum brake line checked, MAF sprayed w/ maf cleaner. CEL comes on after 5 minutes(later in mornings. Car will run fine if I reset with obd II , until I turn ignition off, I will then have to repeat process. I think it goes into limp mode while CEL on, hesitates at 2500 rpm. I bought the car new, has 99,700 miles, no issues till now. HELP!!! Code is p0174, not p0417, dyslexia flare up, can not edit title.

 

P0417 Jaguar Secondary Air Injection System Switching Valve B Circuit Shorted may help....

 

P0174 is quite common - fastest is to read existing threads, I guess. Be sure to read all known causes listed in JTIS.