Car Problem Reports

Toyota Camry Rear oxygen sensor can cause emissions failure

 
Toyota Camry Problem
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Model Years Affected: 1996, 1997, 1998

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The rear Oxygen sensors are a critical element in fuel control (unlike other vehicles) and can cause an emissions test failure for high CO and HCs. The sensing element cracks and and reports an erroneous steady state lean condition which confuses the computer, which in turn makes the fuel mixture overly rich.
  • Visitor, , 220,000 mi

    Failed smog inspection for high HC and CO
    scanned data and found rear o2 reading 0 volts and cruising speed . no codes stored and all monitors ready
    replaced o2 and vehicle passed smog

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