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Old 11-24-2009, 08:37 PM
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Default Code P0155 on my 02 Blazer

Hi, everyone.. This is my 2nd post here, new to the forum.. I have had my blazer now for 2 years now and just now the check engine light came on, so I checked it out.. The code P0155 " H02S Heater Performance Bank 2 Sensor 1" Is this my O2 sensor that went bad?
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Old 11-25-2009, 06:03 PM
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Thanks for the info.... Are there any pics, or info on the exact location of the sensor since I think there are three of them under there?
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Old 11-25-2009, 07:31 PM
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Quote:
Originally Posted by GREZ28 View Post
Thanks for the info.... Are there any pics, or info on the exact location of the sensor since I think there are three of them under there?
I believe bank two is the one for cylinders 2, 4, and 6. Sensor 1 would be the first one that is closest to the beginning of the exhaust manifold.
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Old 11-25-2009, 07:34 PM
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Bank 2 is the passenger side of the engine. The B2S1 sensor is the one closest to the exhaust manifold as tazz stated.
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Old 11-25-2009, 09:36 PM
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Ok, I think I have everything that I need to know now.. I appreciate your help guys!
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Old 11-26-2009, 09:42 AM
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So you guys think I should just change the sensor anyway as my first step? I mean the truck does have 120.000mls on it. I think it would be time to freshen that sensor up anyway..
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Old 11-26-2009, 09:42 AM
 
 
 
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Tags
2004, 96, b2, blazer, chevrolet, chevy, circuit, code, codes, engine, gm, heater, o2, p0155, po155, s1


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