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Home >> Chrysler >> 2004 >> Crossfire Automatic >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Electrical Diagnostics >> Diagnosis And Testing >> DTC P0173: Fuel System 2/1 Rich Control Over Limit (At Load) >> Diagnostic Test >> 3. O2 Sensor Operation
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3. O2 Sensor Operation

NOTE: If one of the O2 Sensors Signal or Ground circuits are shorted to ground or voltage, all the other O2 Sensor voltage readings will be affected.
NOTE: After the repairs have been made, verify proper O2 Sensor operation. If all the O2 Sensor voltage readings have not returned to normal, follow the diagnostic procedure for the remaining O2 Sensors.

Start the engine.

Allow the engine to reach normal operating temperature.

With the DRB III(R), read the O2 Sensor voltage.

Is the voltage switching between 0.4 and 0.6 volt? 

  1. Yes  >> Go To 4
  2. No  >> Go To 8 
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