P0303 mini cooper. After the car warms up to operating temperature It develops...
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P0303 mini cooper. After the car warms up to operating temperature It develops a bad mis. Engine management flashed and then came on with a couple of Lambda codes, which I expected with the decat and P0303 cylinder 3 misfire which I didn't. Other times P0303 Diagnostic Theory for Shops and Technicians When the code P0303 is set in the Powertrain Computer, it means that the Misfire Monitor has detected more than a 2 percent variance in RPM between the firing of any two (or more) cylinders in the firing order. May 13, 2015 · P0303 is a misfire detected on cylinder 3. In this case it’s cylinder #3. My 2010 Mini Cooper S Clubman bad solder on fuel pump relay on the interior fuse panel. Causas comunes y soluciones para el código P0303 Algunas causas comunes de la aparición del código P0303 en vehículos pueden incluir bujías desgastadas o defectuosas, inyectores de combustible obstruidos, bobinas de encendido deterioradas, cables de bujías dañados, entre otros. Code reader shows p2187 and p0303 Misfire on cylinder 3. What are the common symptoms of OBDII code P0303 (Misfire Cylinder 3) in a MINI? - Common symptoms include engine misfiring, rough idle, loss of power, and potential engine vibrations. I have changed all spark plugs and coil packs twice, changed all injectors, changed thermostat, changed valve cover gasket, changed MAF. The car will run great for Mini Cooper MisFire FIX on Cylinder 1 2 3 or 4 P0301 P0302 P0303 P0304 RB The Mechanic 155K subscribers Subscribed Jan 1, 2026 · Step-by-step guide to fixing the P0303 code. The sum of misfires caused an increase in emissions for the first 1000 revolutions after start up, or the sum of misfires caused catalyst Jun 16, 2016 · Just purchased this 2010 Mini Cooper (Non Turbo)70k miles and developed this problem. Jan 7, 2010 · 02 mini Engine+asc lights p0303 and p0203 Jump to Latest 11K views 8 replies 5 participants last post by mike1967 Jan 1, 2021 F May 13, 2015 · P0303 is a misfire detected on cylinder 3. Sometimes it has a weak start. . Systematically diagnose the Cylinder 3 misfire by testing spark, fuel, and compression. A misfire occurs when one of the cylinders inside of your engine doesn’t fire because something is off in the fuel-air-spark ratio. And I have done a compression test and they all are the same. Sep 29, 2016 · Took a friend out in it, and after 2 minutes it developed a pretty bad misfire, which happens when using more than around 30% throttle. May 30, 2025 · The P0303 code indicates your 3 cylinder is misfiring. Mini P0303 Number 3 Cylinder Misfire Detected Description OBD-II Trouble Code Description for P0303 Mini Cylinder 3 Misfire Detected What does this mean? OBD2 Code P0303 Mini definition: A P0303 Mini code means that the the car’s computer has detected that one of the engine’s cylinders is not firing properly. I cleared the codes, and p0303 keep coming back up. Dec 9, 2024 · 1st Gen 1st Time Mini Owner - P0303 cylinder misfire p0303 troubleshooting Jump to Latest 217 views 0 replies 1 participant last post by DSchmaderJr Dec 9, 2024 Feb 16, 2026 · Hey guys, I have a mini cooper with the BMW B38 3 cylinder engine, and I’m getting these codes. This could be a faulty / incorrectly gapped spark plug, failing coil pack, dirty connection on the wiring to the coil pack / loom connector or even a broken wire. Any idea what to expect culprit is? Runs and drives fine. Soluciones y mantenimiento preventivo para el código P0303 El primer paso al encontrar el código P0303 es realizar un diagnóstico completo del vehículo para identificar la fuente exacta del problema antes de intentar cualquier solución. Jun 12, 2023 · So I have been dealing with a misfire in cylinder 3 for about a month. I took it to a local mechanic and had the code P15DF come up along with a few other ones (P0303, P0301, P0304, P0300). Hope these ideas help you with diagnosis and you get fixed. The sum of misfires caused an increase in emissions for the first 1000 revolutions after start up, or the sum of misfires caused catalyst Jan 17, 2016 · Hi ,I have a 2007 Mini Cooper with rough idle when engine warm fault code p0303 cylinder 3 misfire ,I have replaced cylinder head,piston rings ,timing chain kit and vanos gears,vanos solenoids,valvetronic servo motor plugs and coil packs,oil pressure valve in cylinder head ,cleared codes but Sep 21, 2017 · Stock Problems/Issues - MINI Cooper S 2011 - Code "P15DF" - I have a MINI Cooper S 2011 which is giving me problems when starting it. Make: MINI Code: P0303 Definition: Cylinder Number 3 Misfire Detected Description: Engine running at an RPM greater than 600 but less than 7000 the DME detected a misfire or uneven engine running in two or more cylinders within 1000 engine revolutions. Random misfire codes (P0300, P0301, P0302, P0303, and P0304), pending and/or stored.
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