2002 Chevy Blazer oxygen sensors

Tiny
LIDECU
  • MEMBER
  • 2002 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 50,000 MILES
T he check "engine soon light "is on. I have a 2002 Chevy Blazer, and the diagnostic test showed it was oxygen sensor 2 in bank 1. I was told bank 1 is the drivers side. But I have only 1 sensor before the converter on the drivers side or bank 1. There is 1 sensor on the passenger side (bank 2) before the converter and 1 sensor onthe passenger side after the converter (bank 2). Please tell me which one is sensor 2 in bank 1 or am I missing one somewhere. THANKYOU
Sunday, February 15th, 2009 AT 5:33 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
B1S2 is after the catalytic converter
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Sunday, February 15th, 2009 AT 6:01 PM
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Bank 1 is the side with # 1 spark plug (driver's side), on the same side sensor 1 is the sensor before cat converter and sensor 2 would be after the converter.

You sure you didn't mix the numbers up or overlook the sensor?
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Sunday, February 15th, 2009 AT 6:02 PM

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