Question about 1993 Isuzu Rodeo

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Consuming too much fuel.....O2 light on - 1993 Isuzu Rodeo

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The O2 sensor is reading the exhaust as being too lean and is telling the computer to add more gas to the mix.
The first thing to do is check the exhaust system for leaks between the sensor and the engine. You are looking for small black streaks at joints. With the engine running run your hand close to the pipes and feel for air coming out. Repair any leaks first. Then check the wire harness for the O2 sensor by hand looking for bare or broken wires. Anywhere wires are rubbing against each other or on the body. Tape them up if you find anyand make sure there is no corrosion on the plug- ins.
If this is okay then I would replace the sensor. Hope this helps.

Posted on Oct 03, 2010

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