mil light on below 2000rpm
 

hi all just wandered if anyone had experienced this,i have tried the searches but couldnt find an exact match. my engine light has started to come on but only under 2000rpm, checked codes and found code 22 (knock sensor) present, done a reset but still present, no running issues at all boosts at 16psi (polar chip installed), checked the resistance of the knock sensor, 550kohms which is about right i think, ive even cleaned the maf for good measure. anyone come across this before??:thumb:

take of the knock senor, clean up mating surfaces and refit, torquing to correct 23nm

reset ecu after you refit