996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.

Cut the 02 sensor off, got a buttload of error codes

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Old 03-30-2018 | 08:02 PM
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Cut the 02 sensor off, got a buttload of error codes

i got, p2135,p0223,p1120,p1138,p1140,p0103,p0056, I had to cut the rear 02 sensor and didn’t think about unplugging it. Now the car runs rough and I got error codes. I hope it’s just a fuse? Any help?
 
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Old 03-31-2018 | 08:14 AM
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did you cut it while live/ign. on?
 
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Old 03-31-2018 | 09:09 AM
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The O2 sensors are integral to the engine computer. You can't cut one off and expect the car to run as if it were still there. Hopefully you didn't fry anything while you were cutting. If you didn't, you should be fine when you re-connect it.
 
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Old 03-31-2018 | 09:24 AM
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Long story short I’m getting a new ecu it was fried. Car was off, I should’ve unplugged the sensor.
 
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Old 03-31-2018 | 09:40 AM
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you can likely repair the ECU (just went through this exact situation on a car, a hack shop had blow-torched the harness off ).
Made circuit repair on the board and good to go...
 

Last edited by 993GT; 03-31-2018 at 09:43 AM.
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Old 03-31-2018 | 09:48 AM
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I’m having markski do it and put a tune on it at the same time, I do have the ecu out and tore apart. Is it suppose to be greasy on the back side lol
 
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Old 03-31-2018 | 09:50 AM
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should have a wax like film but not 'greasy'
have pics?
 
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Old 03-31-2018 | 09:55 AM
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Old 03-31-2018 | 10:01 AM
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too hard to see with those pics, but scan the whole board for potential blown soldier joint/circuits, if you're lucky a circuit repair is needed vs blown drivers etc
 
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Old 03-31-2018 | 11:24 AM
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There is an ECU doctor in Florida ;-) I used them for my BMW and very honest people work there!


http://www.ecudoctors.com/porsche-99...2001-2004.html
 
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Old 04-01-2018 | 08:00 PM
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Originally Posted by Slider
The O2 sensors are integral to the engine computer. You can't cut one off and expect the car to run as if it were still there. Hopefully you didn't fry anything while you were cutting. If you didn't, you should be fine when you re-connect it.
I cut it off and replaced it with a new one then started the car
 
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Old 04-02-2018 | 12:37 AM
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... that shouldn't fry the ECU - that's the same as unplugging it. We the wires shorted when they were reinstalled?
 
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Old 04-02-2018 | 06:45 AM
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FWIW, only 1 of those codes has anything to do with the o2 sensor.
Re-install the ecu, and do a throttle body relearn and see what happens, also try unplugging the MAF
 
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Old 04-02-2018 | 06:51 AM
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I did all of that already
 
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Old 04-02-2018 | 06:54 AM
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can you verify the throttle body is visibly working correctly?
 


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