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Monitors will not clear?

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
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Yep, there is no way to do that, the monitors must set on their own.
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Friday, December 29th, 2023 AT 10:27 AM
Tiny
STEVE W.
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You can do tests that show you that say the O2 sensors are working, but the monitor has to be set on its own. Like the EVAP service bay test, it shows you that the system is okay but only the completed drive cycle can actually change the monitor to complete. If you followed the drive cycle and they still haven't set, you have a problem that isn't setting a code. For instance, if the coolant temperature isn't in the window listed the test won't run. Or if there is a sensor that is skewed it can block it.
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Friday, December 29th, 2023 AT 11:18 AM
Tiny
BILL14865
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Hey Ken, thanks for the info, the o2 sensors monitor has cleared to ok, at this point I have 4 complete drive
cycles completed and showing 6 cold cycles on the monitor with 2 monitors Inc evap and catalyst. I currently loan the car to a friend of mine told him to drive the hell out of it for about a week and bring it back I'll pay for the ticket if he gets one for no inspection, I leaning towards a electronical issue I'm still get the dash lights flashing when I punch the throttle to 3/4 to full not everything but 1 out of 4 anyway all lights flash off and on like 3time then goes back to normal with no check engine light after the alternator is charging to 13.7 to 14.1 but I have the feeling there's something I'm still getting that dam alarm brake light comes on then I get ding, ding, ding really loud through the speakers, drives me nuts. I changed the level sensor tested the e brake switch that's good. So, I turn the key off, turn it back on it stops light goes out and it does it randomly just not quite right at this point who the heck knows not me that's for sure all I feel like I'm doing is blowing smoke up. At this point.
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Saturday, December 30th, 2023 AT 8:59 PM
Tiny
STEVE W.
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So, it won't set the EVAP and Cat even after the extended drive? That indicates that you have some problem blocking the tests from running. The electrical issue you have is likely the problem. The momentary light show could be causing the module to reset and cancel the testing. What part of NY are you in?
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Saturday, December 30th, 2023 AT 11:26 PM
Tiny
BILL14865
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Up state Elmira area, I can have 1 not ready inc, I know it is a ground problem I added 4 new ones. I am going to just pick up an alternator it could be that damn built-in regulator, the piece of it's the draw. It's not that you're going to want to watch the video of the wet rage in the fuel spout test!
I have had the Buick for 12 yrs it telling me it time for retirement the quick way!
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Sunday, December 31st, 2023 AT 2:49 AM
Tiny
BILL14865
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Heck, I never reprogrammed the BCM I still have the airbag light and I replaced it. But don't care about that for get a NYs inspection it's been on for 4trs always passed right through it never gave any obd2 codes so didn't worry about it.
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Sunday, December 31st, 2023 AT 2:58 AM
Tiny
STEVE W.
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Elmira, you're southern tier compared to me, I'm up near the Baseball Hall of Fame myself. But I can tell you there is a shop in your area that could repair that vehicle, right up the road in Avoca at South Main, so don't toss in the towel yet. That said a BCM mismatch could cause it to not complete testing as the BCM tells the ECM the configuration of options as well as works as part of the safety systems. Likely it will take getting the BCM updated so that it works properly and finding the issue with the voltage dropping to get it to run the monitors. Although the converter monitor is a continuous one, so I'm surprised it isn't running if the CEL is off. One thing you could try, reset the system and run the drive cycle and see if it clears then, it would reset all the other monitors but it sounds like those run and clear okay as it is.
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Sunday, December 31st, 2023 AT 12:23 PM
Tiny
BILL14865
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I am learning that with the BCM, the system has not been completely so I'm going to start again, and this time pull the negative battery for 20 minutes to clear and start fresh and see what is what. I know the shop owner the your telling me of he's a friend from years ago. Small world it is. Thanks, Bill
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Friday, January 5th, 2024 AT 8:47 PM
Tiny
STEVE W.
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Starting fresh will at least show you if there is another problem, if it still refuses to set both monitors you know it's being blocked from running the tests.
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Saturday, January 6th, 2024 AT 5:35 PM
Tiny
BILL14865
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I will let you know here soon when I get the Buick back the I section sticks out so I'm sure he will bring it back soon regardless this coming week. Thanks Bill
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Saturday, January 6th, 2024 AT 7:11 PM
Tiny
KEN L
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STEVE W. Is one of our best! Use 2CarPros anytime, we are here to help. Please tell a friend.
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Sunday, January 7th, 2024 AT 10:08 AM
Tiny
STEVE W.
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We'll be here when you get the car back.
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Sunday, January 7th, 2024 AT 12:50 PM

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