Code P1336? Help
You won't lose your tune performing this re-learn procedure.
Regarding the O2 codes, anything affecting a 'Sensor 1' can dramatically affect the performance of your engine if desire to run in Closed Loop. In Closed Loop, the PCM uses feedback from the front O2 sensors (S1's) to alter fueling as required to aim for maintaining a stoichiometric (14.7:1) air-to-fuel ratio.
DTC P0134 HO2S Circuit Insufficient Activity Bank 1 Sensor 1
DTC P0135 HO2S Heater Performance Bank 1 Sensor 1
DTC P0155 HO2S Heater Performance Bank 2 Sensor 1
You won't lose your tune performing this re-learn procedure.
Regarding the O2 codes, anything affecting a 'Sensor 1' can dramatically affect the performance of your engine if desire to run in Closed Loop. In Closed Loop, the PCM uses feedback from the front O2 sensors (S1's) to alter fueling as required to aim for maintaining a stoichiometric (14.7:1) air-to-fuel ratio.
DTC P0134 HO2S Circuit Insufficient Activity Bank 1 Sensor 1
DTC P0135 HO2S Heater Performance Bank 1 Sensor 1
DTC P0155 HO2S Heater Performance Bank 2 Sensor 1


