No, it is not a knock sensor at all. An AF (Air/Fuel Ratio) sensor is also know as a wide range oxygen sensor. It is the newer type oxygen sensor.
The oxygen sensor on any vehicle is located on under the car on the top of the muffler pipe just behind the cadallidic converter....do you know what the oxygen sensor looks like so you know what you're looking for?
the check engine light will come on
Replace both of them.
Let me know if you find out. i am having trouble locting which one is 1 and which is 2... I was told i needed to replace the #1 oxygen sensor
You will know, You'll get a fault code on your (OBC) on board computer system.
Bank 2 is on the passenger side of the vehicle. Sensor 2 is down stream ( behind ) the catalytic converter. Second sensor from the manifold. May have 4 sensors.
To answer this i will need to know whatsize engine you have.
If the car doesn't start, but the belts are good, the fuel system is good, the ignition is good, everything is good, but you don't know whats wrong, then its the sensor lol
Your engine managment light will come on ,if you recently purchaced 1 and the light still comes on the wiring could be the wrong way round if it is universal
The code thrown will tell you which one is bad. Codes p0130 thru p0135 all refer to the upstream sensor under your coil packs. Codes p0136 thru p0141 all refer to the downstream sensor under the van.
The computer will tell you. If you have a "check engine" light, connect a code scanner to see what the computer has detected. If there is a problem with the oxygen sensor the code scanner will display the appropriate problem code.
Generally, the onboard diagnostics will tell you when you scan the computer codes.
Chilton's manual shows 3E (PO 132) as the left upstream oxygen sensor shorted to voltage.The oxygen sensor input voltage is too high. The problem is in the oxygen sensor itself. (must be replaced) or in the Mini computer unit (MCU) The MCU controls input voltage to the oxygen sensors to control fuel flow. Good Luck I hope this helps
argudfhnrtfhionrsthionoftghn pooooo I have this model vehicle with the same problem. My friend has a code reader which states my engine light is related to an emissions problem. We are going to change out the front oxygen sensor to see if this fixes the problem. There is a rear oxygen sensor that is harder to get to or there may also be a problem with the catalytic converters (expensive). Will let u know if the front oxygen sensor replacements worked
Stop by your local AutoZone. They will hook it up to a handheld tester and print out which oxygen sensor is failing.
Go to the auto parts store and buy a scanner OBD1 or OBD2 and it will let you know why your check engine light is on and if the o2 sensor is bad
An oxygen sensor is bad when it is no longer performing inside a set of parameters that are designated and optimal. The oxygen operates in a very narrow window of voltage and provides feedback to the engine to adjust the air/fuel ratio to maintain performance and emissions. If the sensor is bad and returning poor data, the performance, emissions and mileage will suffer.
Need to know year and engine for specific answer. general answer is that there is usually one sensor on the exhaust manifold(s) and one sensor behind the catalytic converter.
Which oxygen sensor? There are two of them. They each have 4 wires and each wire has two colors. There were two models of the f250 also, need to know engine size. Sorry.
By "exhaust manifold sensor" do you mean the O2 or oxygen sensor? The only sensor I know of on a exaust manifold is the O2 sensor and if you follow the manifold you will see 2 sensors sticking out they will have (usually) green wires coming from them
Oxygen sensor #1 screws in to the exhaust manifold just before the headpipe. The hardest part about replacing an oxygen sensor is screwing it out. Sometimes they are a little siezed in from the heat. after you get the old one out, you'll need to make sure you know how to electrically connect the new one. Some of the replacement oxygen sensors have a plug and others need to be spliced in. Just make sure you connect the wires correctly, following the color codes or the directions that came with the replacment sensor. It's relatively easy and a good first auto repair project.
how you know with each one is with each one wen you reconnect everything .
The check engine light would come on.
There are four oxygen sensors screwed into the converter assemblies. You need to know which one is faulty before attempting to replace them.