Manuals through 2025 now available!
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LEMON is the spiritual successor to CHARM, I recommend you try it!
Link:
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lemon-manuals.org.ua
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Oxygen Sensor: Testing and Inspection
The
Oxygen Sensor if open, should set a Diagnostic Trouble Code
(DTC) 13. A constant low voltage in the sensor circuit should set a DTC 44. A constant high voltage in the circuit should set a DTC 45. DTCs 44 and 45 could also be set as a result of fuel system problems. See DTC charts for conditions that can cause a lean or rich system.
Testing and Inspection