Showing articles & questions for topic
oxygen sensors

Oxygen sensors O2 sensors (https://www.yourmechanic.com/article/where-is-the-o2-sensor-located) will always be located in the exhaust system. Their function is to sense how much oxygen remains in the exhaust that is flowing out of the engine, and report that information to the vehicle’s engine...

Oxygen sensors O2 sensors (https://www.yourmechanic.com/article/where-is-the-o2-sensor-located) will always be located in the exhaust system. Their function is to sense how much oxygen remains in the exhaust that is flowing out of the engine, and report that information to the vehicle’s engine...

Hi there. This code you are getting is due to your system running lean (https://www.yourmechanic.com/article/p0171-obd-ii-trouble-code-system-too-lean-bank-1-by-andrew-quinn). Most of the time, it is caused by low fuel pressure from a weak fuel pump (https://www.yourmechanic.com/services/fuel-pump-replacement) or a clogged fuel filter (https://www.yourmechanic.com/services/fuel-filter-replacement). Another possible...

This is correct in that sometimes the Check Engine Light will stay on. A qualified mechanic should be able to reset this after replacing the oxygen sensor (https://www.yourmechanic.com/services/oxygen-sensor-replacement). I would suggest having an expert, like one from YourMechanic, come to...

Hey there. Oxygen sensors are located in the exhaust system, typically before and after the catalytic converter. Bank 1 is found on the driver's side - if the engine is a V6 or V8. On a 4 cylinder, it would...

Changing the radiator (https://www.yourmechanic.com/services/radiator-replacement) should not have caused a misfire (https://www.yourmechanic.com/services/engine-is-misfiring-inspection). Replacing the plugs and the MAP sensor was a great idea. What we commonly refer to as the O2 sensor is not located in the fuse box. There are...

The sensor after the first catalyst is the one giving you code P0420 and should be replaced if the catalyst is good and you have no other codes in the system.

This vehicle will have one or two catalytic converters since it only has one bank of exhaust. It is very unlikely that this vehicle even has two catalytic converters. It will, however, have two oxygen sensors for every one catalytic...

It sounds like you have a bad misfire. While a faulty O2 sensor could be the cause, it is not the most likely. A misfire can be caused by anything that prevents the air/fuel mixture from igniting properly inside the...

Both codes refer to the oxygen sensor that is to the rear of the catalytic converter. With regard to Code P0037 (https://www.yourmechanic.com/article/p0037-obd-ii-trouble-code-ho2s-heater-control-circuit-low-bank-1-sensor-2-by-john-nelson), if the rear oxygen sensor is brand new, you should check the heater circuit ground (the oxygen sensor...

Oxygen sensors O2 sensors (https://www.yourmechanic.com/article/where-is-the-o2-sensor-located) will always be located in the exhaust system. Their function is to sense how much oxygen remains in the exhaust that is flowing out of the engine, and report that information to the vehicle’s engine...

Hi, thanks for writing in. On most Dodge, GM and Ford V-6 engines, sensor 2 bank 2 is located passenger side, rear of the engine compartment. The 2011 Dodge Charger V-6 has four O2 sensors (https://www.yourmechanic.com/article/where-is-the-o2-sensor-located), but this one is...

The quality of the fuel in the vehicle may possible trigger an O2 sensor to produce false readings, although this is very rare and not normal. As you may know the [oxygen sensors]((https://www.yourmechanic.com/services/oxygen-sensor-replacement) which are part of your emissions system...

As you may know the oxygen sensors, which are part of your emissions system, read exhaust gases to determine whether or not the appropriate amount of oxygen is present in the exhaust. Based upon this reading, this information is relayed...

Hi, thanks for writing in. This is likely an issue related to the catalytic converter (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-catalytic-converter) which may be the converter itself or the O2 sensor (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-oxygen-sensor) which is a sensor that monitors the productivity of the converter as it...

You will have two O2 sensors on this engine. One will be before catalyst in manifold and one will be after or in the rear of the catalyst. If you do not have one then vehicle was modified in some...

You have 2 oxygen sensors in your Chevrolet Equinox. One located before the catalyst and one after. If you're having any issues with these components, feel free to contact YourMechanic, as a certified technician can help you diagnose and replace...

I would try to clear the code first by disconnecting the battery. Make sure you have the radio reset code. Leave the battery disconnected for at least 10 minutes. Reconnect the battery and enter radio code. The Check Engine Light...

It sounds like you have a pretty bad misfire. While a faulty O2 sensor could be the cause, it is not the most likely. A misfire happen can be caused by anything that prevents the air/fuel mixture from igniting properly...

There are two O2 sensors. One before and one after the catalyst. The one before is used for fuel control for fuel injections and the one placed after the catalyst is used to measure catalyst efficiency. A scanner will be...