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1990 VW Corrado, 2002 Audi allroad, 2017 VW eGolf
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7,528 Posts
Discussion Starter · #1 ·
all right. i think i have this licked i just need some info. i just installed my a/f gauge (about a week ago) and the day after it started having a rough idle until it got warm. well, fiddling around i realized that once the o2 sensor got warm (the a/f gauge went to lean) that the idle smoothed out and everything was fine.
now since they are a 4 wire o2 sensor 2 of them are for the heating element (red/white and tan). could i have fried the heating part of the o2 sensor when installing the a/f gauge? if so, do i have to buy a whole new o2 sensor?
 

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1990 VW Corrado, 2002 Audi allroad, 2017 VW eGolf
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7,528 Posts
Discussion Starter · #2 ·
Re: o2 sensor (G0to60)

anybody?
 

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1990 VW Corrado, 2002 Audi allroad, 2017 VW eGolf
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7,528 Posts
Discussion Starter · #4 ·
Re: o2 sensor (TBT-PassatG60)

yeah, that's right. i spliced into the purple wire for my a/f gauge (and that is working) and i've checked the ground that is down near the exhaust. now the sensor seems to work once it's up to temp.
could i have burned out the heater element or something?
 

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Registered
1990 VW Corrado, 2002 Audi allroad, 2017 VW eGolf
Joined
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7,528 Posts
Discussion Starter · #6 ·
Re: o2 sensor (TBT-PassatG60)

i've never replaced since i bought the car (almost 5yrs) so maybe it was just it's time to go. but the weird thing is that it still sends a signal when the exhaust warms it up to operating temp.
i might just bite the bullet and put in a new one.
 
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