New Battery - Computer Reset
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E320
New Battery - Computer Reset
Quick question? I was recently given a 1996 E320. The owner replaced the battery right before giving me the car. They advised me that I had to drive at least 300 miles before the computer would reset for the emissions. Meaning I couldnt take it to DMV inspection until the computer reset. Is this true? ANy help would be greatly appreciated!!
Thanks
Thanks
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Joined: Oct 2007
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From: SoCal
98 Brilliant Silver E320 Wagon
The car resets itself each time the key is inserted and turned on.
If the car wasn't causing any error messages (OBD) then changing the battery would not cause a problem. It is necessary to resync the sunroof and windows (express feature) after battery replacement which is described in the owners manual. But those have no effect on SMOG testing.
Is there maybe something he's not telling you??
If the car wasn't causing any error messages (OBD) then changing the battery would not cause a problem. It is necessary to resync the sunroof and windows (express feature) after battery replacement which is described in the owners manual. But those have no effect on SMOG testing.
Is there maybe something he's not telling you??
Last edited by RichardM98; Dec 19, 2011 at 04:46 PM.
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300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
A new
battery even with no obd2 cel will set all of your I/M monitors to not ready.
You will fail a smog test if they are not ready .
So the computer does not reset itself at every start.
If the I/M monitors are not ready you will need several drive cycles to get them set or you will need to do a forced drive cycle procedure 2 times.
Did you have the car inspected?
Did you have it scanned for pending codes? Those are obd2 codes stored in the cars computer even if they tried to clear the light by unhooking the battery.
Pick up an obd2 scanner for about 50 bucks from harborfreight tools and scan for pending codes then go into the I/M section and check for ready status on o2,secondary air,cats, etc.
Most states allow at least one not ready ,some on older cars 2 not readies.
Cats and secondary take the longest to reset I/M monitors.
OBD2 scan it and post your results,very easy to do. takes 5 minutes.
So to sum it up,disconnecting the battery does affect smog test. You fail if I/M status not ready on over the amount allowed( most often 2 of them.)
One of my old posts in another model forum to get the evap status reset another hold out.
http://m.www.mbworld.org/forums/showthread.php?t=373009
You will fail a smog test if they are not ready .
So the computer does not reset itself at every start.
If the I/M monitors are not ready you will need several drive cycles to get them set or you will need to do a forced drive cycle procedure 2 times.
Did you have the car inspected?
Did you have it scanned for pending codes? Those are obd2 codes stored in the cars computer even if they tried to clear the light by unhooking the battery.
Pick up an obd2 scanner for about 50 bucks from harborfreight tools and scan for pending codes then go into the I/M section and check for ready status on o2,secondary air,cats, etc.
Most states allow at least one not ready ,some on older cars 2 not readies.
Cats and secondary take the longest to reset I/M monitors.
OBD2 scan it and post your results,very easy to do. takes 5 minutes.
So to sum it up,disconnecting the battery does affect smog test. You fail if I/M status not ready on over the amount allowed( most often 2 of them.)
One of my old posts in another model forum to get the evap status reset another hold out.
http://m.www.mbworld.org/forums/showthread.php?t=373009
Last edited by ohlord; Dec 19, 2011 at 07:33 PM.
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From: New Jersey
things with and without wheels
battery even with no obd2 cel will set all of your I/M monitors to not ready.
You will fail a smog test if they are not ready .
So the computer does not reset itself at every start.
If the I/M monitors are not ready you will need several drive cycles to get them set or you will need to do a forced drive cycle procedure 2 times.
Cats and secondary take the longest to reset I/M monitors.
OBD2 scan it and post your results,very easy to do. takes 5 minutes.
So to sum it up,disconnecting the battery does affect smog test. You fail if I/M status not ready on over the amount allowed( most often 2 of them.)
You will fail a smog test if they are not ready .
So the computer does not reset itself at every start.
If the I/M monitors are not ready you will need several drive cycles to get them set or you will need to do a forced drive cycle procedure 2 times.
Cats and secondary take the longest to reset I/M monitors.
OBD2 scan it and post your results,very easy to do. takes 5 minutes.
So to sum it up,disconnecting the battery does affect smog test. You fail if I/M status not ready on over the amount allowed( most often 2 of them.)
Keep in mind that if you are waiting in a long line for the inspection, some car's o2 sensors cool down and might read not ready. Before you get out of the car, rev the engine a little to bring the temperatures up in the exhaust.
