I am chasing a problem with a high MAF reading and would appreciate any ideas on how to diagnose. 2006 XC90 2.5t 210k miles Previous owner had new Bosch MAF installed last year. I purchased a new Bosch MAF and get the same results, leading me to believe it is not a problem with the sensor. Codes are...

To answer some of my own questions and hopefully help someone out in the future: The pinout for the MAF connector is: 1: not used 2: battery voltage ~+12-14v 3: ground 4: +5v 5: signal I checked resistance from pin 3 to one of the nearby chassis ground points and it was about 8 ohms which seemed hig...