on my computer tester for my g m c truck it says calalyst oxygen sensor bank 1. what does bank 1 mean?
it says 1of2 calalyst sensor below emishion standard oxygen sensor bank 1
- Anonymous8 years agoBest Answer
bank 1 refers to the drivers side exhaust section coming out of the engine.
1 of 2 typically refers to the sensor closest to the engine on that bank (there's probably one ahead and one behind the catalytic converter).
- AssaholaLv 68 years ago
bank one is referring to the drivers side exhaust, or bank one is left side of exhaust and bank two is right side this applies most v6 and v8 cars ,and trucks and 4 bangers too
- TruptibenLv 44 years ago
bank one is where #1 spark plug is located(that side of engine