On 8 Aug 2006 14:43:17 -0700, wrote:

>My 98 5.9 grand cherokee started acting odd yesterday. Occasionally,
>from a stop it would be real sluggish about taking off and sounded a
>bit odd...almost like it wasn't getting enough gas. Then it drove ok
>for a while, shut it off and started it back up. CE light was on so I
>pulled the codes. I got these:
>
>PO726 The PCM has detected that the voltage signal from the engine
>speed input is out of range for the current engine operating
>conditions.
>
>And:
>
>P1281 Injection control pressure out of range high.
>
>Any ideas?
>
>Never came acroos anything that involved before, usually simple stuff
>that I can diagnose right away, but I'm kind of aprehensive about
>driving it without knowing what's going on.
>
>Any help is GREATLY appreciated.
>TIA
>
>Mikhail

First, find a new source for code descriptions. P1281 means the
engine coolant temp is cold too long. Usually a thermostat, but a bad
ECT sensor could cause it also.

P0726 would be a trans related code, and if it was causing the trans
to go into limp-in mode, would explain the poor performance.