Is bank 1 sensor 1 upstream or downstream?
Upstream
Bank 1 Sensor 1 means Upstream Right/Rear;Bank 2 Sensor 1 means Upstream Left/Front;Bank 1 Sensor 2 means Downstream Right/Rear;Bank 2 Sensor 2 means Downstream Left/Front.
How do I know which O2 sensor is bank 1?
How To Locate O2 Sensor. In short, the bank tells which side the O2 is on (bank 1 or bank 2), while the sensor number tells if it is before the catalytic converter (sensor 1) or after the catalytic converted (sensor 2). Remember that bank 1 is determined by the side in which cylinder number 1 is located.
Are both O2 sensors the same?
Even though both O2 sensors are four wire, heated O2 sensors, there are definitely differences that the Motronic can detect. You must use the correct ones, whether oem with the correct length cable and plug, or the correct “universal” equivalent, that will require you to measure and splice your old plug onto it.
Is bank 1 driver side or passenger side?
Bank 1 is driver side, yes.
Is upstream bank 1 or bank 2?
Anytime the code reader says sensor 1, it is referring to the upstream. Anytime the code reader says sensor 2, it is referring to the downstream. If you need further assistance with your oxygen sensors, then seek out a professional, such as one from Your Mechanic, to help you.
Should I disconnect battery when changing O2 sensor?
Do I need to disconnect the battery when changing out the O2 sensor? No, there is no need to disconnect the battery when replacing O2 sensors.
How do you fix P0420 catalyst system efficiency Below Threshold Bank 1?
What repairs can fix the P0420 code?
- Replace muffler or repair leaks in the muffler.
- Replace exhaust manifold or repair leaks in the exhaust manifold.
- Replace exhaust pipe or repair exhaust pipe leaks.
- Replace catalytic converter (most common)
- Replace engine coolant temperature sensor.
- Replace front or rear oxygen sensor.