Hello. I have to replace both the bank 1 and bank 2 cat. Does bank 1 and 2 refer to "right" and "left"? Thanks

Need to replace bank 1 and 2 cat. Does bank 1/bank 2 mean right/left? they are listed in the auto parts catalog as right cat and left cat. Thanks

My car has 93000 miles.
My car has a manual transmission.

Experienced mechanics share their insights in answering this question :
Yes, bank 1 and bank 2 is the same as left and right. Bank 1 is the right side of the engine and bank 2 is the left. Before purchasing and replacing the catalyst, you should have a complete diagnosis of the codes you are receiving from the engine computer. You may need to do additional repairs before the catalyst is replaced or damage to the new catalyst may happen. I recommend having a mechanic verify the computer systems are clear of any problems before you can install the new catalyst. If you would like to have the car checked, a qualified professional from YourMechanic can verify the issue and move forward with any needed repairs.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

For modern F-150s, however, you`ll find the catalytic converter on the underside of the truck between the engine and the muffler.
Code P0420 indicates that the catalytic converter is not functioning efficiently, therefore increasing the output of harmful pollutants by the vehicle.
What is a catalytic converter? A catalytic converter converts the harmful exhaust gases produced by the engine into less harmful emissions before they leave the vehicle`s exhaust system.
catalytic converter replacement will run you between $1,420 and $1,445. While these prices are steep, they`re inclusive of labor costs, which will run you between $95 and $120. While overheating may be an indication that your Ford F150 catalytic converter needs replacing, the issue could be a result of something else.
The bank 2 sensor 2 is on your right when facing the truck from the front or drivers side. The sensor is in the exhaust after the catalyst. The bank 2 sensor 1 is just below the exhaust manifold before any catalyst.
Ford Catalytic Converters are designed to reduce carbon monoxide, hydrocarbons, and other noxious gases in the exhaust of your car. Catalytic converters perform this task by allowing the car`s engine to convert noxious gases into simple, non-harmful ones.
A P0420 code indicates that your vehicle`s computer (PCM) has detected a problem with the catalytic converter. The catalytic converter`s function is to break down dangerous pollutants produced during the combustion cycle, lowering emissions released through the exhaust pipe.
Catalytic Converters should run for at least 10 years, but they don`t need to be replaced once the 10 years are up. It needs to get changed once you begin to notice these issues pop up and if it`s recommended by the service technicians.
Catalysts are chemicals that speed chemical reactions without changing their overall process. A catalytic converter, meanwhile, is a metal implement bolted to the underside of the car. It is comprised of an input and output pipe.
Catalytic converters change harmful emissions into harmless gas, and they need to be replaced only if they become clogged or otherwise damaged and can`t function properly. They`re expensive to replace, so they aren`t considered a regular maintenance item. A damaged “cat” should trigger a Check Engine light.
If it has been welded in position then you may not be able to remove it yourself. If you have access to the correct tools and are confident removing the converter then you will be able to continue with the replacement yourself. If not, you will need to take your car to a garage to have a professional look at it.
A P0430 code indicates a Bank 2 catalytic converter issue. This code indicates that the downstream oxygen sensor (placed after the catalytic converter) detects inefficient operation. This code occurs when the catalytic converter fails to reduce exhaust gas pollutants to the specified limits.
Catalytic converters are an essential vehicle component. They convert harmful emissions from your internal combustion engines into less harmful ones. Most cars usually have one catalytic converter, but some vehicles are equipped with two or more, usually to address tougher emission norms.
Although there could be other reasons for a change in your car`s performance, a telltale sign of converter problems is decreased engine performance, including a wide range of symptoms such as reduced acceleration, sputtering, stalling, and increased fuel usage.
A new catalytic converter should last for around 10 years but, as with most other vehicle components, the exact lifespan can differ. Mileage and engine tune can impact on the durability of the item, so it`s worth checking the condition after 50,000 miles.
A P0420 code is set when the upstream sensor and the downstream oxygen sensor sense the catalytic converter is not doing its job. Basically, the amount of oxygen going into the converter is not being burned, and it detects it through the downstream sensor.
The code P0420 can be caused by the catalyst, O2 sensors before and after the catalyst. If both O2 sensors and catalyst was replaced then you may have an exhaust leak at the manifold or pipes.
Bank 2 Sensor 1 means Upstream Left/Front; Bank 1 Sensor 2 means Downstream Right/Rear; Bank 2 Sensor 2 means Downstream Left/Front. Many buyers brought the wrong Oxygen Sensor because they donot pay attention to the plug and the length of the sensor.
The catalytic converter, or cat for short, is responsible for removing harmful emissions from the exhaust. If the two O2 sensors collectively sense that the oxygen levels don`t change significantly after running through the cat, it`s a sign of a bad catalytic converter.
A common emissions code seen in the field, a P0420 trouble code indicates that the catalytic converter isn`t functioning efficiently. To work at peak efficiency, the emissions or feed gases entering the catalytic converter need to be perfectly balanced and not excessively elevated.
The catalytic converter is supposed to last for the full lifetime of your vehicle. It rarely happens that someone must deal with dysfunctional catalytic converter but not impossible. There are a lot of factors that impact the life span, but generally a catalytic converter should last between 70,000 and 100,000 miles.
Catalytic Converters are estimated to last at least 10 years, but they don`t need to be swapped out as soon as those 10 years are up. It only has to get replaced whenever you start to see these issues pop up and if it`s suggested by the service technicians.
The back pressure created by a catalytic converter decreases the fuel thermal efficiency of an engine significantly. A fuel catalyst, on the other hand, both reduces emissions and increases fuel efficiency.
An aftermarket catalytic converter isn`t identical to the original equipment manufacturer catalytic converter. Just make sure the aftermarket catalytic converter you consider meets your state`s or region`s requirements as well as vehicle compatibility. If not, passing the emissions test is going to be challenging.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Hello. I have to replace both the bank 1 and bank 2 cat. Does bank 1 and 2 refer to "right" and "left"? Thanks
ANSWER : Yes, bank 1 and bank 2 is the same as left and right. Bank 1 is the right side of the engine and bank 2 is the left. Before purchasing and replacing the catalyst, you should have a complete diagnosis of the codes you are receiving from the engine computer. You may need to do additional repairs before the catalyst is replaced or damage to the new catalyst may happen. I recommend having a mechanic verify the computer systems are clear of any problems before you can install the new catalyst. If you would like to have the car checked, a qualified professional from YourMechanic can verify the issue and move forward with any needed repairs.

Bank 2 Sensor 1 PA03(?) code. Range performance issue?
ANSWER : Hello. The code you have provided is not a valid automotive error code that I recognize. Based on your context I think it may be possible that there is an issue with the signal range of one of your oxygen sensors. If you’ve replaced the sensors then perhaps the issue may be with the wiring. I would carefully examine the wiring to the oxygen sensors, as well as the connector and contacts for any signs of damage, wear, or corrosion. If the sensors and wiring all check out then it may be possible that the issue is with the computer.

Error codes P0131 and P0151
ANSWER : Hi there:

It would be best for you to review these two links; the first describes what the P0151 OBD-II Trouble Code is and what typically causes it, and second, the P0131 code and what it means.

Truck bogs out under load
ANSWER : First, the EGR tube rusted away will cause excessive air to get into the exhaust and cause the O2 sensors to read erratic. The main reason you most likely have a mass air sensor that is not reading correctly for the altitude you are at. You should check the mass air sensor with the key on and engine off to see if the barometric sensor is reading the correct altitude. If it is reading above 10,000 ft, then replace the mass air sensor. Disconnect the battery for 10 minutes to clear fuel control then road test for problem. If you need a diagnosis, a certified technician from YourMechanic can come to your car’s location to inspect the loss of power and advise you on repair.

Is $2300 too much to pay to replace 2 cat converters for a 2007 Pathfinder?
ANSWER : Hello, thank you for writing in. Your particular make and model does utilize a catalytic converter on both sides of the engine. Catalytic converters are going to vary in price depending on the brand of replacement parts that you are getting. The price may go up if the shop only has access to certain parts, and dealership specific parts in particular can get expensive. Hence why there is such a market for other OEM parts. You may want to do some shopping online on your own and see what other replacement catalytic converts are going for. While the price is fair, it is higher than other exhaust and muffler shops might charge. Contact our service department for a quote from our technicians.

Miss fire cylinder #1, bank 1 sensor 2 codes
ANSWER : Hi there. Before going after a possible catalytic converter or oxygen sensor bank(1) sensor(2), the misfire needs to be corrected. The check engine light flashing would be ECM (engine control module)/computer recognizing the misfire. The spark plug and spark plug wire appearing okay, does not necessarily mean they are okay. The fuel injector could be at fault. Resistance value tests, using an ohmmeter could help isolate the problem. Comparing the resistance value with known good cylinders would give you an idea, what you should expect to see. Proper diagnoses needs to be performed to avoid unnecessary repairs. I recommend having your vehicle’s #1 cylinder misfire be diagnosed and repaired by a certified technician, such as one from YourMechanic.

Bank 1 and Bank 2 running lean
ANSWER : If lean faults occur after the manifold was removed and reinstalled, this indicates a vacuum leak which also means that unmetered air is coming into the intake. Either a vacuum line or induction pipe is loose, or the manifold is not seated correctly. The repair needs to be double checked. If no obvious items are found, a smoke check of the induction may need to be performed to locate the source of the unmetered air leak. You may want to enlist the help of a mechanic, such as one from YourMechanic, who will have the equipment and training to diagnose the error codes and help you move forward with the appropriate repairs.

Check Engine Light is on. Codes are Bank 1 Sensor 1 Low-voltage, and Bank 2 Sensor 1 Low-voltage. . .
ANSWER : Hi there. What seems to be the issue is the fuel pump is not plugged in. The Oxygen Sensors are working and telling you that the system is too lean with having a low voltage reading. If it was just the upstream sensor, then it would be the wiring, however, both sensors are picking up an issue. This is why the engine is running rough and has no power. If you need further assistance with your vehicle having a loss of power, then seek out a professional, such as one from Your Mechanic, to help you.