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Where are the o2 sensors located on the 1999 Ford ranger 3.0 Flex fuel engine?
Wiki User
∙ 9y ago
There should be 2 (upstream) O2 sensors (one for each bank of cylinders) before the catalytic converter and only one (downstream) O2 sensor after the catalytic converter. All 3 are threaded into the exhaust system.
Wiki User
∙ 9y ago
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