Code 44, Lean Exhaust Indication: Notes

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Sensor acts like an open sensor circuit and produces no voltage when exhaust temperature is less than 600°F (316°C). An open sensor circuit or cold sensor causes "open loop" operation.

NOTE: Test numbers refer to test numbers on diagnostic chart.

Code 44 sets when O2 sensor signal remains low for a precalibrated period and system is operating in "closed loop".