Operation CHARM: Car repair manuals for everyone.

DTC 41

Check Engine Light blinks forty-one times:

A problem in the Oxygen Sensor Heater Circuit.


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The Oxygen sensor heater aids the oxygen sensor in warming up faster and starting closed loop operation sooner.

The Check Engine warning light may come on, indicating a system problem, when, in fact, there is a poor or intermittent electrical connection. First, check the electrical connections, clean or repair connections if necessary.