Quote:
Originally Posted by mikefocke
Before you throw parts at it...
How could three sensors fail? Maybe wiring? Critters? Water penetration?
Year?
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Exactly. Having a code for a sensor does not mean the sensor is bad. All 3 of those sensors are related, one measures the amount of air coming in so that the air/fuel ratio can be calculated and the other 2 check to make sure it is correct. A rich or lean condition will cause all that so I would start with checking for vacuum leaks or an air intake leak first, that is after I read the fuel trims and check the actual readings on the sensors.