THE O2 SENSOOR IS MALFUNCTIONING .I WANT TO START BY CHECKING THE FUSE AND I DO NOT KNOW ITS LOCATION
SOURCE: O2 Sensor defect
MR988905 costs $300+
SNG O2 sensor is just below $100
they may claim being made with the same quality and both are tagged "direct fit" for easy installation.
its just my idea, good luck.
SOURCE: How many o2 sensors does a Mitsubishi montero
Believe they have two located on the exhaust close to the manifold.
Just had mine replaced and when I went to look that is what I found.
No mechanic here so heed my warning.
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