P0161 GMC -Can this sensor cause the car not to turn on when is cold?

Question

I have to give gas to be able to turn my car on once is cold

Answer 1

HI there

This code is for the heater circuit in the bank 2 sensor 2 O2 sensor. This will not affect the way the engine starts or runs really.

P0161 GMC - HO2S Heater Performance Bank 2 Sensor 2

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