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P0140 Diagnostic Trouble Code Discussion for July 2011

Heated Oxygen Sensor (Bank 1 Sensor 2) Insufficient Activity

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Trouble Ticket Help Requests for DTC P0140
Help Request Posted
1999 Mazda Miata 1.8L Hesitation, Poor Fuel Economy, Poor acceleration VIN: JM1NB3532X
P0140: Heated Oxygen Sensor (Bank 1 Sensor 2) Lack Of Activity. This car came to us with a high temp gauge (never into red zone) and we found a poor-flowing thermostat. The customer has also complained in the past about poor fuel mileage and poor acceleration in the past. Until now, I could never duplicate the complaint. W...
July 27, 2011