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Old 12-18-2005, 01:57 AM   #1
JNUTZ
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Default p0138?

So I had my CEL pulled today and got

P0138 EGO Sensor Circuit High Voltage (Bank 1 Sensor 2)

Can anyone tell me why I'm getting this? I am running cat less and had the cat deficiency code but then put in the mechanical cel fix, and now I'm getting this one.

Any help would be great, I searched it but can't find an answer on what it actually means and how to fix. Thanks
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Old 12-19-2005, 01:17 AM   #2
JNUTZ
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anyone?
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Old 12-20-2005, 11:29 PM   #3
JNUTZ
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still looking for help!
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Old 12-20-2005, 11:32 PM   #4
Robin2
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Rear o2 that failed? harder on gas lately?

Subaru code is P0138 - Rear O2 Sensor Circuit High Voltage
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Old 12-21-2005, 01:26 AM   #5
JNUTZ
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well, gas milage is normal, I mean winter gas and running stage 2+ utec. with headers and moddified injectors, But if I change the o2 sensor is it gonna happen again? or will that clear it up?
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Old 12-22-2005, 10:21 PM   #6
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Subby Gurus where are you
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Old 12-23-2005, 01:40 PM   #7
hondaeater69
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hey got your email. . .

the P0138 is a rear 02 sensor code, nothing to worry about. . .that sensor only monitors emissions and won't mess with fueling. If you don't get the cat eff code anymore, this may mean the sensor is going bad, or i would imagine it may mean you didn't do the mechanical fix properly.

What confuses me is that you posted EGO something. . .there is another code out there for EGT circuit too high, which will require an electrical resistor fix.

Make sure this is indeed the rear 02 sensor code. Double check your work to make sure you did the mechanical fix properly. If you did and you still get the code, i wouldn't really worry about it. I don't even have my rear 02 sensor plugged in!!

Please note i am NOT a cel fix expert, as a matter of fact i've NEVER done one, just read about it. I use AP + ST and this software automatically takes care of all EGt and REAR 02 sensor codes and elminiates them from rising their ugly heads without the need for CEL fixes.

HTH's!
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Old 12-23-2005, 07:03 PM   #8
JNUTZ
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Thanks for your help. I'll check the fix. Could be I just didn't drill it out enough
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Old 04-12-2006, 01:36 AM   #9
hatchy
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I have the same problem, replaced the rear sensor, didnt fix it.
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