The UVCH is also a good possibility, but wouldn't necessarily cause smoke, would it?
ASE mechanic,
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The P1211 may NOT be from the Hypertech, but actually telling you there's a problem with the HPOP, ICP sensor, or IPR. P1211 indicates an inability for the PCM to achieve target oil pressure in the HPO system. IPR problem or leaking injector o-rings may be suspect.
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Yes, O rings are possible culprits, but show me any truck with a programmer or chip, that has never gotten the P1211? It shows an inability for the pump to achieve the desired HPOP pressure, BECAUSE all the chips and tuners out there, (AT LEAST THE GENERIC ONES for sure) ask for more ICP than the stock pump can supply most of the time...(Under any hard work or acceleration) So any time you run a chip/programmer, your going to have the P1211 stored. I can go out to my truck and scan it right now with my AE program, I guarantee you it will have P1211......
and go to any other 20 trucks out there, and I bet 18 of them would have it. I GUARANTEE the other two had it at some time too, and it would come back.
