Then it's either the sensor or the wiring going to it or a pcm problem or compression or things like a timing chain. Also make sure the egr isn't flowing to much as this can effect it as well. Do this test to see if it is the map sensor.
Attempt To Eliminate Code 22/126 Plug MAP sensor vacuum supply hose. Start engine, and run it at 1400-1600 RPM. Slowly apply 15 in. Hg to MAP sensor. Perform KOER SELF-TEST. Check for Code 22/126, disregarding any other codes at this time. If Code 22/126 is still present, replace MAP sensor. If Code 22/126 is not present, inspect MAP sensor vacuum supply hose. If hose is okay, service other codes at this time. If no other code is present, check engine mechanical condition for cause of low vacuum also for the heck of it you could replace the hose leading to map sensor.
Monday, February 3rd, 2014 AT 12:38 PM