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ECU Reset Time?

Joined
14 October 2002
Messages
1,335
Location
Centreville, Va
I just had 3 of my 02 Sensors and one Cat replaced that seemed to be bad. I'm not throwing any codes and the check engine light is off, but 4 of my 8 system checks aren't ready. How long before these things will reset? I've put close to 300 miles on it so far and no luck. :confused:
 
I just replaced all four of my O2's and reset the ECU. I've put 85 miles on my car. So far no codes and 7 of the 8 tests have been completed.

Not sure why it's taking much longer for you. Have you done various types of driving? City - Stop and Go, Highway at different speeds etc?

I know I have purposly cruszed at different speeds for 15 miles etc. then did city stop and go back to highway blah blah.
 
I just replaced all four of my O2's and reset the ECU. I've put 85 miles on my car. So far no codes and 7 of the 8 tests have been completed.

Not sure why it's taking much longer for you. Have you done various types of driving? City - Stop and Go, Highway at different speeds etc?

I know I have purposly cruszed at different speeds for 15 miles etc. then did city stop and go back to highway blah blah.

It might be because I have been without Cats on my car for over 5 years and its taking a bit longer? I thought the reason my check engine light was due to that, but it turns out I had a bad 02 Sensor...
 
This is a long shot but is there a tiny battery sitting in the DMU housing that also needs to be removed in addition to the battery?
 
This is a long shot but is there a tiny battery sitting in the DMU housing that also needs to be removed in addition to the battery?

As far as I know all you need to do to reset the ECU is remove the Clock Fuse under the hood (7.5 amp) for 3 seconds and your ECU is completly cleaned of any codes etc.

If you have an OBDII code reader you clear / erase it that way too.

Just an FYI ... I have a 100 miles on a reset ECU and only my catalyst test is incomplete.
 
It passed this morning!!! When I came into work my emissions sheet was framed on my desk. Gotta love the service guys!!! :tongue:

It took over 400 miles to get everything to reset...
 
It passed this morning!!! When I came into work my emissions sheet was framed on my desk. Gotta love the service guys!!! :tongue:

It took over 400 miles to get everything to reset...

Aright sounds good, when is the ispection due again?:biggrin:
 
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