1997 NISSAN EMISSIONS AND ENGINE CONTROL SYSTEM

  • Tiny
  • rickricket
  • 1997 Nissan

Engine Performance problem
1997 Other Nissan Models 6 cyl Two Wheel Drive Automatic 144000 miles

Have a Nisson Quest showing PO135 fault which is " Upstream heated O2 heater fault". Both upstream and downstream oxygen sensors were replace, fault cleared, started engine and " check ' light returned. What now? Thanks.

Saturday, September 6th, 2008 AT 8:54 AM

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