So I finished the radiator and hose replacement job, fired up the Jag and I have a P0102 and P0112 code. Both are plugged in properly. When I was doing the work I had the airbox unplugged and stored inside. 02's are reading 1.25 v's, both of them. Tried unplugging the maf, quickly died. According to the ultragauge the MAF seems to be reading close to what you would expect, around 8 g's/sec if holding the throttle open to maintain 2000 rpm, IAT reads close to ambient temperature. So anyone every had anything like this? I hate to throw parts at it and hope it goes away because I have no evidence these are bad other than the codes.

 

drive cycle for a little while and it should clear up

 

Which O2s? You have FOUR not two!

 

New codes after doing some other work? Definitely don't throw parts at it, as it would be EXTREMELY unlikely for two previously good parts to simultaneously fail. Most likely you're looking at something disturbed during this other work.

Wiring diagrams here, see figures 03.5 and 03.6:

http://www.jagrepair.com/images/Elec...al%20Guide.pdf


The MAF gets power from fuse F37 under the hood. It also powers several other items but I don't think those systems would set a fault until after a couple of complete drive cycles.

Also check the airbox installation carefully, such as for a leak in the intake tube. That's one of the possible sources for a P0102 code:

http://www.jagrepair.com/images/Auto..._OBD_II_R2.pdf

 

IAT sensor is integrated into the MAF

triple check the connection

 

You have an str so there is another stand alone iat in the intake cooler manifold. Possibly located passenger side towards the rear. Make sure it is plugged in or not broken. More than likely is the combo maf iat in the airbox tube by having both throwing codes

 

The 2nd IAT (IAT2) throws different codes.

 

check the first post of this thread https://www.jaguarforums.com/forum/s...solved-102810/