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Throttle1982
12-10-2006, 04:30 PM
Anyone know how to reset the OBD2 on a 98 Jeep Cherokee without having the OBD2 control unit?

I recently worked on the exhaust and had it all back together to take it for a test drive, during the test drive I noticed my check engine light came on. Then I realised that I had forgotten to plug in the O2 sensor electrical connector... [27]

I'm hoping I can just jump a couple terminals in the diagnostic plug.

pumpkin
12-10-2006, 05:00 PM
It will reset itself after so many drive cycles, or you need a scanner to turn it off.

Spooner
12-10-2006, 05:56 PM
Just unplug the batery for 15-20 min when you hook it back up take it for a drive to reset the cycle. Also let it idle for about 5 min and you should be good to go.

Dieseljeep
12-10-2006, 08:13 PM
It will reset itself after so many drive cycles, or you need a scanner to turn it off.
[stupid]

Throttle1982
12-11-2006, 06:08 PM
yeah, I disco'd the battery for about 15-20min, but didn't let it idle for 5 mins afterwards. It idles a little funny now. I'm assuming its because the comp didn't have enough time to adjust to the new parameters.

Otherwise, after disco'ing the batt and reconnecting it, it shut the check engine light off.

Gonna re-do it tonight. thx.

jakerngr
12-11-2006, 06:46 PM
take it to a local lube shop and play stupid

Spooner
12-16-2006, 08:08 AM
yeah, I disco'd the battery for about 15-20min, but didn't let it idle for 5 mins afterwards. It idles a little funny now. I'm assuming its because the comp didn't have enough time to adjust to the new parameters.

Otherwise, after disco'ing the batt and reconnecting it, it shut the check engine light off.

Gonna re-do it tonight. thx.


I didnt let mine idle and it ran like shit. It was good after 5 min of idle.

[cheers]

Grantman
12-16-2006, 09:12 AM
Pulling the ECM fuse will do the same thing.