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Odometer won't display fault codes?


 
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DavidXJ
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Joined: 07 Sep 2006
Location: Visalia, CA

PostPosted: Tue Aug 25, 2009 11:15 am    Post subject: Odometer won't display fault codes? Reply with quote

I've heard that on the 1998 and newer Jeeps with the OBD-II computer and digital odometer, you should be able to check your codes with the following sequence from the Jeep Horizons tech section:

Quote:
Newer (OBDII) models - Put the key into the ignition, push down the odometer reset button, then turn the key to RUN with your finger on the button - and then release the button. The odometer will go through 1111111 through 999999, then display the car's serial number. It will then show the error codes (it might show them starting with P). If this method does not work, try the OBDI method.


But this doesn't work on my 1998 XJ. The odometer runs through 1111111 to 9999999 and then just goes to my mileage. It doesn't display the serial number and it never says any codes. My computer is a replacement because the original fried... could this be why?

Anyway, if someone has had a similar experience with their OBD-II jeep, is there a solution besides going out and buying a code reader?

DavidXJ

[ADD] By the way, my check engine light is on, and if I clear it by disconnecting the battery, it will stay off until it warms up, and then it comes back on. Both O2 sensors are brand new.
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Mauzy
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Joined: 06 Feb 2008

PostPosted: Thu Sep 24, 2009 2:38 pm    Post subject: Reply with quote

Strange. I just went out and checked my 99 that has OBDII and it does the same-goes through the digits, moves the gauges, flashes the lights, and goes to mileage. Mine is original, but I've never had any problems so no codes would show up anyhow. Doesn't show the serial number either...
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DavidXJ
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Joined: 07 Sep 2006
Location: Visalia, CA

PostPosted: Thu Sep 24, 2009 2:42 pm    Post subject: Reply with quote

Hmmm, well, at least I'm not the only one. My check engine light is on and I've since bought a code fault check reader, and I definitely have codes. But the key trick doesn't work. I'd be curious if any of you other '97+ owners out there have tried this recently and it worked.
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