Iat readings

05wh250

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Jan 23, 2012
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hendersonville, nc
I've been working on my towing tune with Bill from php. This past weekend, pulling about 4000 it ran good, but the engine fan wouldn't fully kick in. Got home and pulled codes and had a p2199 and a p1335. I checked both iat sensors with my laptop this morning and iat1 was showing 72* after sitting overnight and iat2 was showing 69* with ambient at 71*. I looked for a p1335 and found it has to do with the egr valve but mine is ******d and just plugged in under the hood. Are the readings for the iats within spec? And what about the egr code?
 

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