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2002 Blazer 02 sensor

 
 
 
 
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Old 11-21-2006, 04:55 PM
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Default 2002 Blazer 02 sensor

[size=3]I have a 2002 Blazer LS 4.3L 4wd 65k miles.....

Check engine light has been on for a 6 weeks.
Disconnected battery overnight twice but does not clear.
Advance Auto Parts Global OBDII scan says P0155- O2 sensor heater circuit malfunction (Bank 2 Sensor 1)
Bought sensor from Advance Auto but connector was wrong (Bosch).
Which sensor is bad?

Please help!

Tom
 
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Old 11-21-2006, 05:08 PM
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Default RE: 2002 Blazer 02 sensor

Do yourself a favor and purchase an AC Delco sensor. Bosch sensors are JUNK!

B2S1 is the passenger side O2 sensor directly before the 'Y' in the y-pipe.
 
 
 
 
 
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