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Q: o2 sensors code, how to test and replace on 1992 Dodge Ram Van B350

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
locate and replace o2 sensors
(1) Answer
The oxygen sensor is threaded into the left exhaust manifold above the manifold outlet. The connector mounts to clip on the left motor mount bracket.. In order to test the sensor you usually need a scanner or digital oscilliscope. Are you getting a check engine light, or just reduced gas mileage?