Engine/Transmission (1998.5 - 2002) Codes

[Rockcrusher]

Milage has been falling off, from 16 - 17 DOWN TO 10 AND 12 UNLOADED.

Checked codes and only shows P PUE; what ever that is.

 

[nps]

Means you don't have any codes.



Check and clean your MAP sensor and IAT sensor.



Also check for boost leaks. Particularly the lower intercooler hose on the driver's side that gets cut by the inner fender sheetmetal, and the turbo outlet downpipe that gets rubbed by the AC high pressure switch. Bend the sheetmetal and gently bend the AC line to make sure these rubber pieces are not damaged.



A leaking injector can decrease mileage, but you should be seeing some smoke.