Can our cars run without O2 Sensor 1

ThomasMartin · 04-01-2008, 12:23 PM

Hey Guys

I have Procede V2
Catles DP and Exhaust
O2 Simms

i have been having a big problem with my car for a while.
The car started misfiring cyl 1,2,3 and i got Malfunction O2 Sensor 1 Bank 1

The car was seriously not drivable it was misfiring very badly and went into limp mode evey couple of km's

I took it to a good friend at BMW and asked him to diagnose the problem for me, when i got the car back he told me he had to reprogram the ECU and unplug the O2 Sensors so the car could run ok. He told me i would have error codes 0030,0050 and an increase in fuel economy but the car would run perfectly fine.

knowing that the O2 sensors at position 1 control fuel mixture i took it for granted that they just removed the O2 Sensors at position 2 but when i looked up codes 0030 and 0050 they are about sensor 1 ( Pre-cat) how could they have removed these sensors and it fixed my problem no more misfiring? How does the car run without these O2 sensors?

P0030 HO2S Heater Control Circuit Bank 1 Sensor 1
P0050 HO2S Heater Circuit Bank 2 Sensor 1

Secondly would it than be safe to reinstall my procede? How does it monitor and change fuel ratio?

Thanks

ThomasMartin · 04-01-2008, 12:53 PM

Anyone

turbotko · 04-01-2008, 01:47 PM

I wouldn't reconnect the procede. The car also will not have closed loop fuel control without the precat sensor installed. I wouldn't have ever given the car back to a customer without the precat sensor installed and working. The DME will substitute a value (basically open loop fueling) until the sensor is working correctly again, but you are going to fix it correctly right?

I definetely would not re-install the Procede until this is corrected. If you're technician disconnected a precat O2 sensor as a permanent fix.......you should find a different technician.

scalbert · 04-01-2008, 01:48 PM

It will be fine as long as you add the axial discronificator in parallel to the open leads.

ThomasMartin · 04-01-2008, 01:58 PM

Quote:

Originally Posted by turbotko

I wouldn't reconnect the procede. The car also will not have closed loop fuel control without the precat sensor installed. I wouldn't have ever given the car back to a customer without the precat sensor installed and working. The DME will substitute a value (basically open loop fueling) until the sensor is working correctly again, but you are going to fix it correctly right?

I definetely would not re-install the Procede until this is corrected. If you're technician disconnected a precat O2 sensor as a permanent fix.......you should find a different technician.

So if this solution worked it just confirmed it was an O2 sensor that was the problem? I should ask them to replace it? Cause they said they could not find a problem and they tested the sensors? As usual when they dont know what it is they blame the exhaust.

ThomasMartin · 04-01-2008, 02:00 PM

Quote:

Originally Posted by scalbert

It will be fine as long as you add the axial discronificator in parallel to the open leads.

Do you speak Klingon?

scalbert · 04-01-2008, 02:00 PM

Quote:

Originally Posted by ThomasMartin

Do you speak Klingon?

Just playing in light of the day, April 1st.

ThomasMartin · 04-01-2008, 02:05 PM

Quote:

Originally Posted by scalbert

Just playing in light of the day, April 1st.

Damn and i thought what you said sounded good

So you dont think it is safe to install the procede again Scalbert?

They say they didnt know what it was causing all my problems but when they reprogrammed the ecu and unplugged the sensors the car ran great.
Is there any other possibility besides a bad O2 sensor? So i can force them to replace it?

scalbert · 04-01-2008, 02:07 PM

Quote:

Originally Posted by ThomasMartin

Damn and i thought what you said sounded good

So you dont think it is safe to install the procede again Scalbert?

They say they didnt know what it was causing all my problems but when they reprogrammed the ecu and unplugged the sensors the car ran great.
Is there any other possibility besides a bad O2 sensor? So i can force them to replace it?

To be honest, I would not install the PROcede. Since the PROcede attentuates the signals from the front O2 sensors to get the needed extra fuel, not having the sensors in there means it gets no fuel corrections. You would run lean under higher boost which is not worth the risk.

O-cha · 04-01-2008, 02:13 PM

I wouldn't even be driving the car. I'm surprised it even runs. Is this more April fools crap? Come on guys.

Mr. 5 · 04-01-2008, 02:17 PM

Quote:

Originally Posted by O-cha

I wouldn't even be driving the car. I'm surprised it even runs. Is this more April fools crap? Come on guys.

What, no sense of humor O-cha?
Laughter is a good thing.

ThomasMartin · 04-01-2008, 02:24 PM

Quote:

Originally Posted by scalbert

To be honest, I would not install the PROcede. Since the PROcede attentuates the signals from the front O2 sensors to get the needed extra fuel, not having the sensors in there means it gets no fuel corrections. You would run lean under higher boost which is not worth the risk.

Thanks Scalbert looks like they took a short cut so they didnt have to remove the exhaust to change the front sensor. Ill take the car back and insist that its not a proper solution, Thanks

M&M · 04-01-2008, 04:01 PM

Turbotko, does the car run in some form of "safe" mode where it runs pretty rich when the sensors are disconnected? Or does it maybe look at the downstream lambda's for the AFR's?

04-01-2008, 12:23 PM	#1
ThomasMartin First Lieutenant 29 Rep 321 Posts Drives: BMW 335i Coupe Join Date: Jun 2007 Location: South Africa iTrader: (0)	Can our cars run without O2 Sensor 1 Hey Guys I have Procede V2 Catles DP and Exhaust O2 Simms i have been having a big problem with my car for a while. The car started misfiring cyl 1,2,3 and i got Malfunction O2 Sensor 1 Bank 1 The car was seriously not drivable it was misfiring very badly and went into limp mode evey couple of km's I took it to a good friend at BMW and asked him to diagnose the problem for me, when i got the car back he told me he had to reprogram the ECU and unplug the O2 Sensors so the car could run ok. He told me i would have error codes 0030,0050 and an increase in fuel economy but the car would run perfectly fine. knowing that the O2 sensors at position 1 control fuel mixture i took it for granted that they just removed the O2 Sensors at position 2 but when i looked up codes 0030 and 0050 they are about sensor 1 ( Pre-cat) how could they have removed these sensors and it fixed my problem no more misfiring? How does the car run without these O2 sensors? P0030 HO2S Heater Control Circuit Bank 1 Sensor 1 P0050 HO2S Heater Circuit Bank 2 Sensor 1 Secondly would it than be safe to reinstall my procede? How does it monitor and change fuel ratio? Thanks
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04-01-2008, 12:53 PM	#2
ThomasMartin First Lieutenant 29 Rep 321 Posts Drives: BMW 335i Coupe Join Date: Jun 2007 Location: South Africa iTrader: (0)	Anyone
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04-01-2008, 01:47 PM	#3
turbotko Lieutenant 67 Rep 527 Posts Drives: 09 E90 M3 Join Date: May 2007 Location: georgia iTrader: (3)	I wouldn't reconnect the procede. The car also will not have closed loop fuel control without the precat sensor installed. I wouldn't have ever given the car back to a customer without the precat sensor installed and working. The DME will substitute a value (basically open loop fueling) until the sensor is working correctly again, but you are going to fix it correctly right? I definetely would not re-install the Procede until this is corrected. If you're technician disconnected a precat O2 sensor as a permanent fix.......you should find a different technician. __________________ 10 AW on fox E90 M3 with 2 pedals, gentleman’s ride 08 AW on fox E92 M3 also 2 pedals, a bit more rowdy
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04-01-2008, 01:48 PM	#4
scalbert Major General 158 Rep 5,776 Posts Drives: '13 S4, '15 Q7 Join Date: Feb 2007 Location: Woodstock, GA iTrader: (8)	It will be fine as long as you add the axial discronificator in parallel to the open leads.
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04-01-2008, 02:13 PM	#10
O-cha Brigadier General 230 Rep 4,726 Posts Drives: Mcoupe Join Date: Oct 2007 Location: In front of you iTrader: (2)	I wouldn't even be driving the car. I'm surprised it even runs. Is this more April fools crap? Come on guys. __________________
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04-01-2008, 04:01 PM	#13
M&M Captain 114 Rep 750 Posts Drives: Boosted Beemers! Join Date: Mar 2007 Location: Johannesburg, South Africa iTrader: (0)	Turbotko, does the car run in some form of "safe" mode where it runs pretty rich when the sensors are disconnected? Or does it maybe look at the downstream lambda's for the AFR's?
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