GOT FOUR CODES PO135, PO146, PO147, PO155

  • Tiny
  • cg02
  • 2000 Chevrolet Blazer
  • 141,000 miles

2000 chevy blazer 4.3. The service engine light is on and I got four codes PO135, PO146, PO147, PO155. What do these codes mean and what do I need to do to get the service light to turn off so I can inspect it?

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Monday, January 16th, 2012 AT 11:58 PM

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  • Tiny
  • hmac300
  • Expert
  • 44,341 posts

Those are all O2 sensor circuits. See if the wires leading to them have been burnt from touching the exaust pipes.

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Tuesday, January 17th, 2012 AT 12:20 AM
  • Tiny
  • cg02
  • Member

Is the one of the 02 sensor circuits located behind the catalytic converter and is the other one by the exhaust manifold?

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Tuesday, January 17th, 2012 AT 12:59 AM
  • Tiny
  • hmac300
  • Expert
  • 44,341 posts

Yes, one inf fornt and one in back of both converters. Bank 1 is left side bank 2 right

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Tuesday, January 17th, 2012 AT 1:05 AM

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