Po420 nissan sentra

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Log in. Sign up. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. Can anyone confirm this? I've done a quick search but found nothing. Thanks, Mark.

Po420 nissan sentra

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. I have read that there are several possible causes. It appears that either 1 or both of the O2 sensors are bad or the catalytic convertor is bad. I'm going to start with at least either the upper or lower sensors being replaced. Has anyone had to replace O2 sensors and which one is more probable. My scan tool isn't showing me the output voltages but I'm willing to take a shot at replacing the O2 sensors first. The cat is pretty expensive. Anyone have any ideas or experience.

This is an older thread, you may not receive a response, and could be reviving an old thread. Explore Our Forums.

Log in. Sign up. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. I've had this light on and off for the past 4 months or so. I've done some reading on this code, and it sounds like it could be the catalytic converter. I am a complete Newbie when it comes to maintaining cars.

P is a well-recognized error code within the automotive industry, notorious for its persistence. Luckily, this article is designed to guide you through understanding the implications of this error code, exploring its possible causes, and navigating potential fixes. Drawing on our experience, we acknowledge that resolving P can be challenging without appropriate knowledge. This complexity arises as the error can take a significant amount of time to reappear, even after parts replacement and code resetting. Throughout this blog post, we will address these issues and more, providing you with comprehensive insight into the P code. This could be attributed to a malfunctioning catalyst or potentially be a false alarm triggered by a defective O2 sensor. The engine control module ECM uses two O2 sensors, one in front, and one behind the catalytic converter to measure its efficiency. If the catalyst system efficiency is low, the P code will be triggered.

Po420 nissan sentra

This page is meant to help you troubleshoot the Nissan Sentra P trouble code. A failing oxygen sensor or bad catalytic converter are the most common causes of P Catalyst system efficiency is the percentage of these chemicals removed from the exhaust system. Oxygen sensors measure these pollutants. When the readings from the upstream and downstream oxygen sensors show similar readings not enough pollutants expelled from the exhaust , your car will throw the service engine soon light P This can happen for three reasons:. You can ignore this section if your Sentra has an inline engine or if the exhaust manifolds merge into one pipe before the catalytic converter.

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See our article "Automotive Circuit Testing " , if you need more assistance with this. Sorry, but that data cannot support your proposition. It's worth a thousand words. He insisted it was the throttle body and sent me a link to purchase a original nissan throttle body part online that was cheaper. Explore Our Forums. This is an older thread, you may not receive a response, and could be reviving an old thread. Napa is often the best source. These elements reduce the toxicity of harmful exhaust gases that are expelled from the tail pipe. Also the engine starts fine from an overnight rest, and idles at about RPM until it warms up. I was at the gas pump, and for some reason I felt inclined to add the Additech to my gas tank fill. Turn ignition switch ON.

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.

I got it scanned the code P was retrieved. Log in. Part circled in green. Of course right now the van is empty, is that a good number for one of these vans? Video Photos. Catalytic converters are quite efficient, but if engine maintenance is neglected or an engine is allowed to "run rough," damage could occur, resulting in costly repairs. I opened it and it wasn't too bad but in the bottom I saw a little trash and leaves so I decided to clean it all out. Swap the spark plug with a different cylinder. Include an image. It just made a loud noise from the exhaust when I pressed the gas.