Question about Cars & Trucks
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Posted on Jan 02, 2017
SOURCE: My 2002 Lancer's check engine
Aftermarket converters can cause catalytic converter monitor issues, these are not O2 sensors, they are catalytic converter efficiency monitors, I know they look like a O2 sensor but they are very different in how they work, what are the codes you are getting.
Posted on Nov 05, 2008
SOURCE: o2 sensor location
DTC P0156 indicates the output voltage of the downstream Heated Oxygen Sensor (HO2S) is less than some calibratable functional window.
The possible causes are:
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Posted on Apr 16, 2009
SOURCE: P0420 and P0430
The AF sensors are uupstream and the O2 down stream. The car' s computer tests them and it is saying your cats are bad. If you have a scan tool you could look at the data and see what the sensors are seeing. The Af sensors are the ones that control the fuel ratio in the car while the O2's just watch. AF's would be the one to change but there is no garuatee that the codes won't come back.
Posted on Sep 25, 2009
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