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TechnicZ · 08-05-2015, 09:21 AM

Bank 1 and bank 2 sensor 1 are AF sensors. These are crucial bc they monitor exhaust gasses and sends feedback to the ecu for fuel trim correction. Sensor 2 on either bank are 02 sensors which monitor catalytic converter efficiency. Sounds like bank 1 sensor 1 is dead on the heater circuit side which during cold starts helps warm up the sensor to operating temp. You could possibly let the shop know now one sensor was damaged during install. That's what I would do. If you want more info on my experience. PM me.

Random misfire makes sense because the ecu doesn't know how bank 1 is performing. Start at the AF sensor.

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08-05-2015, 09:21 AM	#3 (permalink)
TechnicZ Base Member Join Date: Oct 2009 Location: NJ Posts: 106 Drives: 2009 370z Base Sport Rep Power: 15	New CEL codes after Test pipe install Bank 1 and bank 2 sensor 1 are AF sensors. These are crucial bc they monitor exhaust gasses and sends feedback to the ecu for fuel trim correction. Sensor 2 on either bank are 02 sensors which monitor catalytic converter efficiency. Sounds like bank 1 sensor 1 is dead on the heater circuit side which during cold starts helps warm up the sensor to operating temp. You could possibly let the shop know now one sensor was damaged during install. That's what I would do. If you want more info on my experience. PM me. Random misfire makes sense because the ecu doesn't know how bank 1 is performing. Start at the AF sensor. Sent from my iPad using Tapatalk