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. 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.

Po420 nissan sentra

Log in. Sign up. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. I currently have been having these issues and wanted to here if y'all had any ideas. Okay so I had only the code P the check engine light disappeared for a bit then randomly came back on but this time with code P I originally fixed code P with new spark plugs and now it's back for the code P I just had my car at the dealership shop which they changes both O2 sensors so it's not that also for some information a few days ago I quite literally had everything after the precat fall off my car when driving so I only have the exhaust manifold and precat both O2 sensors are there. My question 1st question is for the P should I just dump out the cat until I can get an aftermarket exhaust manifold or is there something I should try before that? My 2nd question is after I check the spark plugs if there still good should I chang the coil pack and spark plugs boots and go from there? Sort by Oldest first Oldest first Newest first Most reactions. FSM also suggests a timing issue but I highly doubt it, I could see a coil pack causing it due to the misfire issue. Your misfire will just increase the likelihood of a failure.

It is showing the very common P code. I would avoid the universal weld in place cats as quality widely varies.

Log in. Sign up. Home Forums Nissanclub. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. Had no worries for about a week. I was at the gas pump, and for some reason I felt inclined to add the Additech to my gas tank fill.

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.

Po420 nissan sentra

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.

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Also a complete exhaust system diagram. So that means I have to change the oil a little more often. During this check, a 1st trip DTC might not be confirmed. If the rear Monitoring Oxygen sensor is losing bandwidth and not able to easily reach the milli volt threshold-but still barely passes its monitor tests-then it, too, can fool the computer into setting a P code. The wiring shop suggested a clog in the cat… stupid diagnosis from a shop that should know better… A wiring fault… a short to ground especially… can occur when driving causes vibration and engine movement stressing the wiring. This is an older thread, you may not receive a response, and could be reviving an old thread. Throckmorton 38 Replies. Log in. And that is from a population of incidents rather larger than you listed. The only thing I noticed on the MAF, is that it looks like there are clamps for a small wire on the outside of the sensor. If either of theses conditions can be easily verified, then the Catalytic Converter is defective. Its worth some cash if its full. Answer questions. Its purpose is to maintain an ideal level of oxygen for use by the rear of the converter.

This page is meant to help you troubleshoot the Nissan Sentra P trouble code.

Also the engine starts fine from an overnight rest, and idles at about RPM until it warms up. It accelerates fine, revs up to 5K and over, does not sputter frequently or die. When I took the car to get a diagnostic, the mechanic claimed there were no electrical or vacuum leaks in the vehicle I made sure to ask them however it may be a possibility that there is still one of those issues. Had the same code on mine, took it to dealer and they installed a new cat. Recommended Communities. Research is your friend as is information. I think the difference is the upper and lower oil pan is a little smaller for the Sentra. Recommended Communities. That means it is intermittent and hard to find. My question is, how do I find out which Cat needs to be replaced?