Po420 nissan sentra

Always go with front 02 sensor first

Log in. Sign up. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. I clear it and can drive maybe minutes before it comes back on.

Po420 nissan sentra

Hello, I need some advice for an issue I have been dealing with for the past year with my nissan sentra. I got it scanned the code P was retrieved. I replaced the MAF sensor with hitachi brand however the light came back on I thought maybe I purchased a faulty one so I went and got it replaced with a new hitachi MAF sensor but the light still came on after a few hours. The next morning my check engine light came back on and I took it back to the dealership. Many times my car would stall and I would have to press the gas enable for the engine to stay on. I took my car to different mechanics and I have been led in circles. Starter was good brand and new battery so those are canceled out. One day after work, I got into my car and started my engine however the car would not move after switching the gear to drive. It just made a loud noise from the exhaust when I pressed the gas. I eventually got the car started and I went directly to a mechanic. He insisted it was the throttle body and sent me a link to purchase a original nissan throttle body part online that was cheaper. I purchased the part and he installed it and reprogramed the throttle body and cleared the codes. However, on my way home the check engine light came back on and he referred me to an electrical auto shop suggesting that it may have something to do with the wiring. They said there were no electrical issues or vacuum leaks in the system. I bought a scanner to try and get the codes and do some research before spending that kind of money.

Logically replacing the MAF seems like a smart thing to do although notice the 5th and 6th possible causes.

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P is usually related to the catalytic converter and other more serious repairs. For this reason, we recommend not driving your car until the P code is resolved. Some related repairs can be done DIY but the more serious repairs listed below should be done by a mechanic. Advertiser Disclosure. P means the catalytic converter is not efficiently removing pollutants from the exhaust. Read more about how catalytic converter problems can hurt your engine here. Yes, it is usually alright to continue driving in the short term with P It does not pose a risk to the driver. Driving long term with this code can damage your engine and exhaust system.

Po420 nissan sentra

If you own a Nissan Sentra and your diagnostic tool flashes the P code, it indicates a problem with the catalyst system efficiency below the threshold for Bank 1. This can be concerning, but with the right approach, you can diagnose and fix the issue. This guide will walk you through understanding and addressing the P error code in your Nissan Sentra. It signifies that the vehicle's computer has detected the catalytic converter is not operating as efficiently as it should be, compared to the factory specifications. This inefficiency can affect the vehicle's fuel economy and emissions output. Shop Car Ignition Switch Now. To accurately diagnose the cause of a P code in your Nissan Sentra, follow these steps:.

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Explore Our Forums. I took it to the Oreily shop next to my home, for a 2nd opinion scan. AVS Forum. Thanks twinturboz. It is showing the very common P code. I'm going to see what the temperatures are going in and going out. Also a complete exhaust system diagram. AVS Forum. Sign up. Log in. Explore Our Forums. So that means I have to change the oil a little more often. View all Fixya Reports. Sign up. It appears that either 1 or both of the O2 sensors are bad or the catalytic convertor is bad.

P is a well-recognized error code within the automotive industry, notorious for its persistence.

My question is, how do I find out which Cat needs to be replaced? I contacted a former employee, who now works for Nissan engineering, and had him search this issue. Its worth some cash if its full. You can't post answers that contain an email address. Absolutely wrong, the number one reason the code is tripped according to Nissan records is sensor issues, not the cat failure. That is important… wiring problems. Insert Quotes Quotes Post Reply. Car starts with no power, but after a few restarts, gain power again. It's a totally stock engine, no mods. Open engine hood. Basically this means that the oxygen sensor downstream after the catalytic converter on bank 1 is detecting that the converter is not working as efficiently as it should be according to specs.