Strange codes on 98 cherokee
 

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

Strange codes on 98 cherokee
 

are u running the recommended premium gas for that jeep with the 5.9and
when was the last time you changed the fuel filter???

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

Strange codes on 98 cherokee
 

Yes, and about 3 months ago

philthy wrote:
> are u running the recommended premium gas for that jeep with the 5.9and
> when was the last time you changed the fuel filter???
>
> 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

Strange codes on 98 cherokee
 

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.