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P0155 code (deciphering)

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Old Dec 13, 2010 | 09:07 PM
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Default P0155 code (deciphering)

Ok, my car threw the code P0155. The screen on the Cen-Tech CAN OBDII reads as follows:
01/02 and P 02/02
The "P" comes up with 02/02.
It's apparently bank 2 sensor1...does that mean drivers side or pass side of the car? It must be "pre-cat" right?
Are our sensors pre-cat and post cat sensitive?
I'm looking to buy either NTK or OEM AcDelco.

Any help is appreciated.
(mpg's and driveability is obviously suffering a bit)
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Old Dec 13, 2010 | 09:25 PM
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bank 2 ----sensor 1

pass side - pre cat


the o2 sensor is either shorted to gorun, shorted inside or the the heating part of it is screwed up, check for a short to groun ( like melted to the pipes) if not i would suggest replacing
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Old Dec 13, 2010 | 09:44 PM
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Thank you for the feedback. The car has over 105k miles on it...it couldn't hurt to just replace both (front pre cats 02's).
Summit has this, I believe its the right one:

http://www.summitracing.com/parts/NGK-21528/?rtype=10

Last edited by dansean1; Dec 13, 2010 at 10:34 PM.
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Old Dec 15, 2010 | 09:11 PM
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My car threw this code when I first bought it and I just cleaned the MAF,Throttle body, and replaced the air filter. That cleared up the problem for me you might want to try that first
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