2005 Buick Rendezvous Engine Runs Rough Sometimes Code Bank1 System Lean

2005 BUICK RENDEZVOUS
13,600 MILES
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ANONYMOUS
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engine runs rough sometimes, engine code is, bank1 system lean
Nov 18, 2012 at 11:03 AM
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DRCRANKNWRENCH1
  • ✓Experienced Mechanic
  • 3,435 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.
Nov 18, 2012 at 11:07 AM
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