Bank 2 Sensor 1 A Powerful Tool for Engine Optimization

For sensor replacement, make sure to do both of them. O2 sensors are really wear items and have a lifespan of around 100-150K before they'll start getting lazy. Yes, P0155 is a heater code that simply means B2S1 needs replaced. You have to have patience and the right tools for this sensor(not necessarily ... Bank 1 will be cylinder 1. Cylinder 1 is usually the furthest cylinder forward. Right hand side in a Ford, left hand in a Chevy etc. Preview image for a collapsed post. 1. Mike-Omologato-G.;3263351 said ... While my SAE/ISO reference gives one scheme to number cylinders and banks: The cylinder furthest away from the driver is #1 cylinder and ... Bank 2 means that the O2 is sitting on the side of the engine that has the #2 cylinder. (Bank 1 would mean it's on the side of the #1 cylinder.). Bank 2 Sensor 1 is located on the Front of the engine, Before the catalyst, it should be visible from under the hood, and lucky you, it should be the easiest ... This bank 2 sensor 1 is the upstream(Before Cat) sensor and if standing outside of the van looking at the front clip, it is the sensors toward the front. A major cause of misdiagnosis is not understanding the code definition. The problem starts by shortening or modifying the displayed code ... The O2 sensors are located on the exhaust system (easy to spot as they stick out). You can get them from most any auto parts store.