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my excursion will not start. I borrowed a friends ae and read those codes. I changed the cps first thinking that was it. anyone ever had this before im guessing I have a bad idm. I looked at the valve cover connectors nothing appears burnt or damaged.
 

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P1271 - High to Low Side Short — Cylinder 1
P1293 - High Side Open Bank No. 1 (Right)
P1294 - High Side Open Bank No. 1 (Right)
P1298 - IDM Failure

The first three indicate wiring problems. I would ohm out the wiring to be sure.

The last could indicate a failed IDM, but not conclusively. I've had that code on occasion and am still running it.
 
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