Strange codes on 98 cherokee

- M
- mikhailnew
  
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posted
17 years ago

Tue, Aug 8, 2006 9:43 PM

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

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- P
- philthy
  
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posted
17 years ago

Wed, Aug 9, 2006 12:25 AM

- M
- mikhailnew
  
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posted
17 years ago

Wed, Aug 9, 2006 1:09 AM

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- bllsht
  
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posted
17 years ago

Wed, Aug 9, 2006 5:47 AM

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.

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