there are 4 Oxygen sensors on this truck
my codes are reading this
P0037 1/2 heater Circuit is low
P0138 1/2 Circuit is high
so my question is do i change 2 of the 4 sensors and which ones do i change ?
Upstream or down stream heater oxygen sensor?
any help would be appreciated Thank you so much
my codes are reading this
P0037 1/2 heater Circuit is low
P0138 1/2 Circuit is high
so my question is do i change 2 of the 4 sensors and which ones do i change ?
Upstream or down stream heater oxygen sensor?
any help would be appreciated Thank you so much
May 31, 2019 at 11:07 PM