Toyota Supra Problem Report

Toyota Supra Rear oxygen sensor can cause emissions failure

(3 reports)
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.
Related Items:
Over the time the exhaust gas recirculation (EGR) system may become plugged with debris, the ox...
A rough idle and even an emissions inspection failure for high HC and CO can be caused by impro...
At higher mileages, an anti-lock brake system wheel speed sensor may wear out and illuminate th...
The Throttle Position Sensor can get out of adjustment due to wear in the throttle body or due...
At higher mileages (125,000+) the mass air flow sensor may cause the vehicle to idle rough, run...

Related Content