Need advice. So my Nissan Titan is throwing a code for a random misfire and I’m not quite sure why. P0300 is often accompanied by cylinder-specific misfire codes (P030X, where the X indicates the cylinder number that is misfiring). While replacing them they looked pretty normal except for #3 (second cylinder back, drivers side). This code indicates that your vehicle’s engine is misfiring and can be a drivability threat. Aug 27, 2015 · the truck is giving code p0300, ive replaced plugs and coils still no luck. I'm inclined to replace the remaining coils (5) with new Hitachi coils and see if that solves the rough start and multiple misfires. NISSAN TITAN 2004 P0300 Hello to all, I am reaching out to you for help and assistance as I am facing an issue that is causing me frustration with my 2004 Nissan Titan CC, it has 290k~ miles on the odometer. Aug 17, 2023 · Repair Information for P0300 Nissan code. Oct 30, 2025 · Code P0300 Definition P0300 – Random or Multiple Misfire Detected Still unsure what’s wrong with your car? Ask a mechanic now. I took it to a shop to get a diagnosis and they eventually told me it was a clog in my cats. Oct 29, 2021 · This cycle continued for a few days so I plugged in a scanner and it came up with two codes P0300 and P0301. Thoughts, suggestions, thanks! Customer: I have a 04 Nissan Titan with a SES light on the code is a P0300. Cannot figure it Notes: The Nissan P0300 code means that a cylinder (s) is misfiring or is randomly misfiring. Same model etc. ) which usually point to what the issue is. I'd guess you have a leaky injector on bank 2. Since you've already replaced the spark plugs, ignition coils, and injector #4 but still have a rough-running engine, the compression test result of 60 psi on cylinder #3 is a big concern. There are many factors that can trigger this trouble code, including problems with the ignition system and fuel delivery, vacuum leaks, and engine mechanical issues, among others. A P0300 code indicates random/multiple cylinder misfires. After changeout we had several codes and solved them one by one. The P0300 code has yet to return. Feb 16, 2024 · Hi. Since spark plugs, ignition coils, and O2 sensors are replaced, check for vacuum leaks, fuel injector problems, or a clogged fuel filter. Got the dang MIL misfire on cylinder 2 a few weeks back. If I clear the code using the scanner it resurfaces quickly P0300). I replaced the coil and plug on the # 1 cylinder with a Hitachi 22448EY00A coil and Denso FXE24HR11. Wanted to share what ultimately fixed the problem. Oct 29, 2021 · The P0301 code has not resurfaced. What I've noticed is the truck would "fix" itself if the Apr 2, 2018 · I ran by and had the codes pulled and i had P0300 twice and P0430. Original Engine had 275k Bought another with 150k. In this informative video, we delve into the common automotive issue known as Nissan P0300, its causes, symptoms, and various fixes. Jun 21, 2021 · 2006 Nissan Titan p0300 code 0300 head gasket maf misfire titan Jump to Latest 4. In my case this is the only code firing. ” In most cases, a P0300 is accompanied by other trouble codes from P0301 to P0308. Feb 8, 2022 · P0300 code help please Jump to Latest 4K views 10 replies 3 participants last post by Pocho Feb 11, 2022 Pocho Discussion starter May 19, 2025 · Summary Code P0300 stands for “Random or Multiple Cylinder Misfire Detected. The auto parts store said that was most likely an ignition coil or plugs. Few years Sep 5, 2024 · The P0300 code on your 2011 Nissan Sentra indicates a random/multiple cylinder misfire, which can be tricky to diagnose. P0300 is a general diagnostic trouble code. Nov 21, 2023 · Note that on most applications, misfire related codes will be set when the crankshafts’ rotational speed varies by more than about 2 percent within a predetermined time period, which varies somewhat between applications. If you own a Nissan vehi Apr 8, 2024 · I developed the PO300 code and I tried lots of things to get rid of it. Start by checking for intake leaks, intake gaskets are common caused of multi-cylinder misfiring. 5K views 1 reply 2 participants last post by VStar650CL Jun 21, 2021 Nov 11, 2018 · P0300 is a generic OBDII code that can occur with the Nissan Titan. First off 2004 with cajun b-pipes and JBA longtube headers and uprev tune. Dec 31, 2025 · Finding the root cause of a P0300 code can be a complex puzzle, but understanding the possible causes is key to a successful repair. It had been a while and I was about due for plugs so I replaced all 8. please help!. Nov 11, 2018 · Nissan Titan P0300 Meaning Worn plugs are a very common cause of P0300. The whole time have had exaggerated misfires with ECU making both banks run Lean. Since something is causing cylinders to misfire randomly, figuring out the Jun 8, 2024 · Hey gang, It's been along time since I posted. The last was temp of Fuel Pump.

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