ENGINE RUNS ROUGH SOMETIMES ENGINE CODE IS BANK1...

  • Tiny
  • Anonymous
  • 2005 Buick Rendezvous
  • 13,600 miles

Engine runs rough sometimes, engine code is, bank1 system lean

Sunday, November 18th, 2012 AT 7:03 PM

1 Answer

  • Tiny
  • DrCranknWrench
  • Expert
  • 3,458 posts

Could be a leak in the exhaust near an oxygen sensor making the ECU think that it is running lean. Check the exhaust for cracks or leaks near oxygen snesors.

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Sunday, November 18th, 2012 AT 7:07 PM

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