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P0423

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P0423 OBD-II Trouble Code: Heated Catalyst Efficiency Below Threshold (Bank l)
P0423 P0423 code definition Heated Catalyst Efficiency Below Threshold (Bank l) What the P0423 code means P0423 is an OBD-II generic code that the engine control module (ECM) got input from the heated catalyst efficiency sensor for bank 1 that...
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