I have my car tuned with gutted pre cats. I need to get my precat o2 sensors and MAF overlimit codes removed so I can go through emissions. Been driving with the CEL on and no registration for a long time now, need fixed.
Thanks
I have my car tuned with gutted pre cats. I need to get my precat o2 sensors and MAF overlimit codes removed so I can go through emissions. Been driving with the CEL on and no registration for a long time now, need fixed.
Thanks
You cannot code out front O2's and MAF's. Those are the only thing keeping the car running right. Rear O2's can be coded out. Have you scanned for codes?
2013 Audi S8
Yes, I have the codes are P0103, P0174, P1455. P0420, P0430.
None of these came up until the moment I had the reflash.
P0174-too lean Bank2, EGT1, these you should not have. The P0103 can be avoided before your test by clearing the code and driving the car easily for the minimum mileage needed before the test, something like 20 or 30 miles after clearing codes before they will usually let you test. The P0420 & P0430 can be fixed by coding out your rear O2's. You shouldn't be getting the 'too lean bank 2' or the EGT1 codes. Who did your tune? How many miles on the car?
2003 White RS6 2013 Midnight Blue S5
2013 Daytona RS5 2x944 Turbo's 1974 911 w/'91 3.6ltr motor
Roy, WA
I have 130k on the car, not one code up until the day it was tuned, I don't want to say who tuned it, he is trying to work on a fix for the problem, but seems to be having trouble. So I am looking for anyone who can tune the o2's out...
I have winols, but have no clue how to use it, and cannot read german. Lol
I tune RS6s. Smooth, powerful, safe & affordable. Proven results. PM me for more info
Mugello Blue RS6 \ 206K Miles \ Tune Only \ 11.93 @ 116.9 \ http://y2u.be/TqE3-JzYCig \ Daytona Grey RS6 \ Tune, Decatted & Exhaust \ 11.59 @ 118.6 \ http://y2u.be/hqawHXwWcOU
I'll get front O2 and EGT intermittent when running lean and hot....you can cook those egt's costing you $, and the O2's might not like it much. Since you're playing with fire, and seem to have VAGCOM, go log Timing, EGT's, and Lambda values, will let you know if the tune is wreaking havoc. Also could just be old plugs or fuel filter inhibiting a good strong tune, or....
Ace/Edge TC - Tozo Trans - MTM TCU - REVO/ME7 tune - Wagner IC's w/ Venair Hoses - Aux Radiator delete - Hotchkis Sways - Hawk HPS Pads - Koni Sport Struts - Scroll KO4 Turbos - Devil's Own WM - 421whp/452wtq on Mustang Dyno - http://www.audirssix.com
Marc, it is P1074, apparently I need to work on my typing skills. haha.
It's not because the car is running hot, I can drive around normal at part throttle and though codes will come back driving without boost. The MAF code only comes on when I'm boosting hard.
Anybody able to code out the O2 sensors?
Either that, or I need to put my computer back to stock so I can get through omissions. Not really thrilled about driving around in an unregistered car anymore That has a check engine light on all the time.
You should log data, and find then fix the problem, it would help your car greatly. Why would you code out a sensor that is trying to help you? Plus you'll get better performance with the car buttoned up...
If it's just MAF maybe it's a small leak, sometimes a good shop can fix you up quick!
Ace/Edge TC - Tozo Trans - MTM TCU - REVO/ME7 tune - Wagner IC's w/ Venair Hoses - Aux Radiator delete - Hotchkis Sways - Hawk HPS Pads - Koni Sport Struts - Scroll KO4 Turbos - Devil's Own WM - 421whp/452wtq on Mustang Dyno - http://www.audirssix.com
It's not because the car is running hot, I can drive around normal at part throttle and though codes will come back driving without boost. The MAF code only comes on when I'm boosting hard.
Anybody able to code out the O2 sensors?
Either that, or I need to put my computer back to stock so I can get through omissions. Not really thrilled about driving around in an unregistered car anymore That has a check engine light on all the time.
Its not a problem with the car, none of these codes were active until the day I installed the flased ECU.
The tune will ask more for the car, therefore exposing problems such as an air leak. What tune is it? If you're that unsure of the tuner I would pull it from the car anyhow, but it's a problem with the car is my guess.
If you're not logging data to see just what is going on you're playing with fire...
Ace/Edge TC - Tozo Trans - MTM TCU - REVO/ME7 tune - Wagner IC's w/ Venair Hoses - Aux Radiator delete - Hotchkis Sways - Hawk HPS Pads - Koni Sport Struts - Scroll KO4 Turbos - Devil's Own WM - 421whp/452wtq on Mustang Dyno - http://www.audirssix.com
I tune RS6s. Smooth, powerful, safe & affordable. Proven results. PM me for more info
Mugello Blue RS6 \ 206K Miles \ Tune Only \ 11.93 @ 116.9 \ http://y2u.be/TqE3-JzYCig \ Daytona Grey RS6 \ Tune, Decatted & Exhaust \ 11.59 @ 118.6 \ http://y2u.be/hqawHXwWcOU
Got it, seems like an easy fix then. So why the problems? Just code out the rear O2's which is standard, and don't flog the car for a few miles after clearing codes as mentioned.
Actually first time in years I've heard about the MAF exceeding because of a strong tune. Lots of people seem to have their car tuned to the edge without this issue. Again, would be nice to see a log...
Edit; Boost leak is a common reason for the MAF code...
Ace/Edge TC - Tozo Trans - MTM TCU - REVO/ME7 tune - Wagner IC's w/ Venair Hoses - Aux Radiator delete - Hotchkis Sways - Hawk HPS Pads - Koni Sport Struts - Scroll KO4 Turbos - Devil's Own WM - 421whp/452wtq on Mustang Dyno - http://www.audirssix.com
Won't that be for naught, when actual tailpipe emissions are measured during the test?
The PPM counts will be drastically higher w/o a functioning cat. system. Can't see how turning off the MIL (not CEL folks, that's domestic auto talk there!) light is going to help much. At least the AWD system makes it exempt for a loaded dyno test.
Either way seems a shame to pollute 10 to 100X more just for a few more HP.........
Cheers, G2/Gary
C5-RS6/KWV3/Revo/H20 Inj./Custom BBK/Custom cooling/CNC arms \ VW Touareg V10 \ B7A4 2.0T Avant \ Mk1 Callaway Scirocco \ audirs6parts@gmail.com / www.oilpro.myamsoil.com
Believe it or not, most states, including across the border here in Washington just plug into the OBDII port and don't even sniff the exhaust on an OBDII car. Some are stricter and do the sniff test and a couple even do the above and below visual inspection looking for modifications.
2003 White RS6 2013 Midnight Blue S5
2013 Daytona RS5 2x944 Turbo's 1974 911 w/'91 3.6ltr motor
Roy, WA