How many 02 sensors are really on a dodge ram pu 4x4 1999 the part stores keep telling me there are 3 but ive found two
49 States automatic and manual ...Item 1 is not a sensor, just a connector.
Calif and 49 States, click for full screen In case you are wondering, it looks like the Calif has one in the back of the engine. What that is is the upstream on left side of engine, in the manifold...and -1/2- Bank 1 sensor 2 is downstream but the one labeled 4 in red is in the crossover. Thai is a second cat in the crossover under trans in blue
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