Where is the upstream oxygen sensor on 2002 Dodge Caravan?

The upstream oxygen sensor on a 2002 Dodge Caravan is located in the exhaust manifold, before the catalytic converter. Because there are two catalytic converters (one for each bank of cylinders on a V6 engine), there will be two upstream O2 sensors, one for each bank.

To pinpoint the exact location, you'll need to consult a repair manual specific to your 2002 Dodge Caravan's engine (3.0L or 3.8L). These manuals will have diagrams showing the sensor locations. You can find these manuals online or at auto parts stores. Looking at diagrams online related to your specific engine type can also help.

Keep in mind that accessing these sensors can be difficult and may require removing heat shields or other components. If you're not comfortable working under the hood, it's best to have a qualified mechanic replace them.