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Joined: Sep 2004
Posts: 363
CEG\'er
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OP
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Joined: Sep 2004
Posts: 363 |
Well I have had the MIL on for a while now and decided to get the codes scanned. Here's what was found:
-HO2S signal circuit malfunction: P0156.
-HO2S heater circuit malfunction: P0135, P0141, P0155 and P0161.
I find it very hard to believe all these HO2S's have gone for a crap all at once. Is it possible a fuse is blown somewhere to cause this or am I looking at multiple O2 sensor replacement ? Car seems to be running fine without any significant mileage change ...
98 Mystique GS V6 - K&N, projectors
91 Mustang LX 5.0L
00 Jetta TDI, Yay, I bought it !!
95 VW Getta TD - RIP: Nov.3,2005
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Joined: Jun 2005
Posts: 5,345
Addicted CEG\'er
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Addicted CEG\'er
Joined: Jun 2005
Posts: 5,345 |
Originally posted by weasel:
..I find it very hard to believe all these HO2S's have gone for a crap all at once. ..
Me too. Check/change Fuse 13 (20AMP) for O2 sensors in the Power Distribution Box next to the battery.
Originally posted by weasel:
.. Is it possible a fuse is blown somewhere to cause this ..
Yes.
"Always do the cheap and easy ones first."
1996 V6 ATX 96K miles
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Joined: Dec 2004
Posts: 197
CEG\'er
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CEG\'er
Joined: Dec 2004
Posts: 197 |
Originally posted by weasel:
Well I have had the MIL on for a while now and decided to get the codes scanned. Here's what was found:
-HO2S signal circuit malfunction: P0156.
-HO2S heater circuit malfunction: P0135, P0141, P0155 and P0161.
I find it very hard to believe all these HO2S's have gone for a crap all at once. Is it possible a fuse is blown somewhere to cause this or am I looking at multiple O2 sensor replacement ? Car seems to be running fine without any significant mileage change ...
Or you could also have one of the heater circuits grounding out the rest. I've seen that happen many times before when I worked at the dealership.
Have fun....
The ONLY 96 (engine) 3L
Build 'em fast. Spray 'em faster.
ricehatersclub.com
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Joined: Sep 2004
Posts: 363
CEG\'er
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OP
CEG\'er
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Have fun, gee thanks !!! Well I did some looking and fuse 13 wan in fact blown. I replaced it and it blew again. I traced the first two upstream O2 sensors and didn't notice any wiring problems ( well I traced them into a loom ! ). Haven't checked the last two, but I doubt its a sensor itself. Any ideas where to look to find this ? Known problem areas ??
98 Mystique GS V6 - K&N, projectors
91 Mustang LX 5.0L
00 Jetta TDI, Yay, I bought it !!
95 VW Getta TD - RIP: Nov.3,2005
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Posts: 1,788
Hard-core CEG\'er
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Hard-core CEG\'er
Joined: Sep 2002
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Inspect the sensor harness to see if one is lying on the exhaust manifold and has melted.
Steve
98 Contour SE Sport 2.5 Duratec ATX The wifey's car
89 Taurus SHO - 246K miles
94 SHO ATX - 190K
1997 F-150 5.4L ATX - The Workhorse 150K.
ANY THREAD WITH "OMG" or "WTF" ETC IN THE TITLE WILL BE IGNORED!
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Joined: Sep 2004
Posts: 363
CEG\'er
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OP
CEG\'er
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Will do ... tomorrow though. Raining like a SOB here.
98 Mystique GS V6 - K&N, projectors
91 Mustang LX 5.0L
00 Jetta TDI, Yay, I bought it !!
95 VW Getta TD - RIP: Nov.3,2005
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Joined: Sep 2002
Posts: 136
CEG\'er
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CEG\'er
Joined: Sep 2002
Posts: 136 |
Disconnect the all 4 O2's, put a fuse in, if it still blows you have a problem in the harness. If it doesn't, plug 1 O2 in at a time until the fuse blows, when it blows that is the O2 you need to replace.
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