Clear CEL
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Joined: Jul 2007
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From: Derry, New Hampshire
Clear CEL
I have a blue tooth OBD II reader that ties in with my smart phone. It csn read codes on my 1997 2500 5.9 auto. However the clear CEL function is not working. Any tricks to these early OBD II's
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Joined: Jan 2018
Posts: 156
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From: Wilson NC
O2 locations....
Generally , when you get an O2 code the scan tool will point the way. You will see a B1S1 or a combination of the B and S numbers. The B stands for Bank. Bank 1 will always be the bank with number 1 cylinder, Bank 2 will always be the other side. Note: inline engines will never have a B2 code. S1 or S2 will denote the sensor position, 1 being the first in the stream, 2 being the next. I believe my 99 shows an S3 code, presumably because the rear sensor is shared. Hope this little tidbit helps someone.
Clearing the codes can be finicky, on the last one I did, I had to clear the code, and the history code separately, and still had to turn the key off and interrogate the system again to verify the code was gone. This may be due the your readers programming, I don't know. Luckily, since I did the cap rotor wires and plugs, then did the O2 workaround on my '99 niner, I have been code free.
As far a driving the vehicle to be able to pass an OBD inspection. It's not a mileage thing. The vehicle had to complete certain drive cycles. In these cycles it must do certain things, eg: travel above 50 miles an hour for 8 miles, then slow to 35 for 10 miles, etc etc etc.....all these things being accumulative, meaning most vehicles can complete all the cycles in 150 miles or less, under "normal" driving conditions. Not everyone's driving conditions fall under the normal category. Where I live you can have 1 not ready code on 2001 and newer, 2 not ready on 96 to 2000 models. New vehicles are exempt (or going to be) for 3 years, 95 and older only get safety inspections, 30 years and older are exempt.
Clearing the codes can be finicky, on the last one I did, I had to clear the code, and the history code separately, and still had to turn the key off and interrogate the system again to verify the code was gone. This may be due the your readers programming, I don't know. Luckily, since I did the cap rotor wires and plugs, then did the O2 workaround on my '99 niner, I have been code free.
As far a driving the vehicle to be able to pass an OBD inspection. It's not a mileage thing. The vehicle had to complete certain drive cycles. In these cycles it must do certain things, eg: travel above 50 miles an hour for 8 miles, then slow to 35 for 10 miles, etc etc etc.....all these things being accumulative, meaning most vehicles can complete all the cycles in 150 miles or less, under "normal" driving conditions. Not everyone's driving conditions fall under the normal category. Where I live you can have 1 not ready code on 2001 and newer, 2 not ready on 96 to 2000 models. New vehicles are exempt (or going to be) for 3 years, 95 and older only get safety inspections, 30 years and older are exempt.