I have a 2004 ford explorer xlt v6 4.0l gas. need a o2 sensor diagram. I need names and description. for example bank 1 sensor 2 after catalytic converter

bank 1 is the side of motor that has # 1 cylinder you have 4 o2 sensors 2 in exhaust right off motor and 2 after catalytic converter ,you may get a reading that could look like this example 1/1= bank 1 # 1 o2 sensor by motor or 2/1= bank 2 # 2 o2 sensor after catalytic converter, hope that wasent to confusing

could still be a vacuum leak.

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It is the one that is on the driver's side, first one in the exhaust stream before the catalytic converter.

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There is 4 senors the bank 1 sensor 1 is located in front of the LH (Drivers side) catalytic converter
Hope this helps

The answer depends on the type of exhaust system you have. You will have either 3 or 4 total O2 sensors on your V8. If you have single exhaust with a single catalytic converter then you will have 3 O2 sensors (2 upstream sensors & one downstream sensor - "up or down stream" meaning before of after the catalytic converter). If you have either dual exhaust and/or two catalytic converters then you have 4 O2 sensors (2 upstream & 2 downstream). If you have an MIL light (malfunction indicator light, or "check engine light") the code will indicate "front bank / bank one", which is one of the 2 upstream O2's before the catalytic converter(s), or "rear bank / bank two", which is one of the O2's after the catalytic converter(s).

Diagram: Ford Explorer and V8 O2 (Oxygen) Sensor Locations

Ford Explorer and V8 O2 Sensor Locations diagram. This shows the location of Ford oxygen sensors on Bank 1 and Bank 2. If you want to know where your O2 sensors are, this diagram is your guide.



Hope helps.

The "bank" references which side of the engine the O2 sensor is on. The "sensor" references if the O2 sensor is before the cat or after the cat.

Bank 1 is the same side of the engine as the number one cylinder. Bank 2 is the other side of the engine.

Sensor 1 is before the catalytic convert and sensor 2 is after the catalytic converter.

So bank 2 sensor 2 is the O2 sensor on the side of the engine opposite the number one cylinder and after the catalytic converter.

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One of three (3) possibitlies:
1. Catalytic Converter is malfunctioning.
2. O2 Sensor is malfunctioning. This will be the O2 Sensor located on the Catalytic Converter. However you should check and/or replace both sensors if needed.
3. You have an Exhaust Leak.
In Order of checking:
A. Check and Repair any Exhaust Leak.
B. Replace the O2 Sensor on the Catalytic Converter 1st. Also Known as the Downstream O2 Sensor or HO2 Sensor.
C. Replace the O2 on the Exhaust Manifold prior to the Catalytic Converter. Also Known as the Upstream O2 Sensor.
D. Replace the Catalytic Converter.
Let me know if this helped, or if you have any additional information, problems or questions. Feel free to contact me at FixYa.com!