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That is an oxygen sensor, it tells the computer how rich or lean the engine is running on bank 1. The computer uses this info to control how much fuel the engine gets.

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16y ago

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Obd ii code p0135 on 94 Lexus ES300?

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Where is bank 1 sensor 1on a Lexus es300?

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I have a Lexus 96 es300. There are three oxygen sensors on this car. All the sensors are on the exhaust pipe. The first oxygen sensor which is in front of the engine when you open the hood called (bank # 2). The second sensor locates between the back side of the engine and the wall called ( bank # 1). It is very hard to replace if you have a big hand b/c there is not enoght room . The third sensor locates near the catalic convert. You only can see it if you are under the car. Most of the oxygen sensor go bad is the ones between the wall and the back side of the engine (Bank #1). Do not confuse! Bank # 2 locates next to the FAN/RADIATOR. When you check the oxygen sensor, make sure which bank - bank ?I have a Lexus 96 es300. There are three oxygen sensors on this car. All the sensors locate on the exhaust pipe. The first oxygen sensor which is in front of the engine when you open the hood called (bank # 2). The second sensor locates between the back side of the engine and the wall called ( bank # 1). It is very hard to replace if you have a big hand b/c there is not enought room . The third sensor locates near the catalic convert. You only can see it if you are under the car. Most of the oxygen sensor go bad is the ones between the wall and the back side of the engine (Bank #1). Do not confuse! Bank # 2 locates next to the FAN/RADIATOR. When you check the oxygen sensor, make sure which bank - bank ?I have a Lexus 96 es300. There are three oxygen sensors on this car. All the sensors locate on the exhaust pipe. The first oxygen sensor which is in front of the engine when you open the hood called (bank # 2). The second sensor locates between the back side of the engine and the wall called ( bank # 1). It is very hard to replace if you have a big hand b/c there is not enought room . The third sensor locates near the catalic convert. You only can see it if you are under the car. Most of the oxygen sensor go bad is the ones between the wall and the back side of the engine (Bank #1). Do not confuse! Bank # 2 locates next to the FAN/RADIATOR. When you check the oxygen sensor, make sure which bank - bank ?


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There are 3. Bank 1 sensor 1 is between the radiator and engine when you open the hood. It looks like a spark plug screwed into the header coming out of the engine, going down, and feeding into the exhaust. Bank 2 sensor 1 is between the firewall and the engine (back side of engine). It also looks like a spark plug screwed into the header coming out of the engine, going down, and feeding into the exhaust. Hard to see unless you get under the car. The 3rd sensor is on the top side of the exhaust pipe just after the catalytic converter. The connection for this one is underneath the carpet under the driver seat. EDIT: I have a 1996 Lexus ES300. Unless is more than one engine, then bank 1 is the BACK of the engine, between the engine and the firewall. I checked with two Lexus service centers and also looked at the spark plug wires. The number one cylinder is on the back, not the front of the engine.