MAFT tuning and O2 code questions
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TECH Enthusiast
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Joined: Jan 2003
Posts: 523
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From: Cape Coral, FL
MAFT tuning and O2 code questions Ok if my Ltrims are running very positive at cruise about +8-10 but when i put in nuetral when rolling up to a stoplightlight it goes negative but once i accelerate again it goes positive. This mean I want to lean the car out until they go negative. Right? Also at what throttle percentage should they go to zero.
I am also throwing these codes
P0140 O2S NO 12 (O2 Bank 1 Sensor 2 no activity detected)
P0160 O2S NO 22 (O2 Bank 2 Sensor 2 no activeity detected)
I am pretty sure i am getting these cause I dont have the back 02's hooked up because of my longtubes.
P0145 O2S Slow 21 (O2 Bank 2 Sensor 1 Slow Response)
Is this sensor not working properly?
Any help would be greatly appreciated. Thanks
I am also throwing these codes
P0140 O2S NO 12 (O2 Bank 1 Sensor 2 no activity detected)
P0160 O2S NO 22 (O2 Bank 2 Sensor 2 no activeity detected)
I am pretty sure i am getting these cause I dont have the back 02's hooked up because of my longtubes.
P0145 O2S Slow 21 (O2 Bank 2 Sensor 1 Slow Response)
Is this sensor not working properly?
Any help would be greatly appreciated. Thanks
TECH Apprentice
Joined: Mar 2002
Posts: 357
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From: Newfoundland, Canada
Re: MAFT tuning and O2 code questions If your seeing positive ltrims of +8 to +10 in part throttle driving, that means your car is already running lean and you must ADD fuel to bring them into the negative range.
As for the rear O2 codes, yep you're getting those because you have the rear's disconnected. As for the other code on your front 02 on bank 2, sounds like you have a bum sensor. Or maybe you've burnt a wire because it's too close to your headers - have a quick check there to make sure they're not running too close to the LT's.
As for the rear O2 codes, yep you're getting those because you have the rear's disconnected. As for the other code on your front 02 on bank 2, sounds like you have a bum sensor. Or maybe you've burnt a wire because it's too close to your headers - have a quick check there to make sure they're not running too close to the LT's.
