Learn about the P0303 OBD-II code indicating a cylinder 3 misfire. Discover symptoms, common causes, and expert diagnostic tips to troubleshoot effectively.

Jan 17, 2016 · And they replaced #3 coil. - Once again code went away. Drove couple of miles and once again when I shut off car and restarted, check engine light showed up again (OBD …

Jul 9, 2025 · Mitsubishi Outlander Mitsubishi Outlander persistent P0303 code indicating misfire on cylinder 3 despite multiple component replacements - 2 reports. Learn about this problem, …

Jun 23, 2025 · Ram 1500 Ram 1500 engine light on with rough running due to cylinder #3 misfire code P0303 - 2 reports. Learn about this problem, why it occurs, and how to fix it.

Understand the P0300 OBD-II code: random cylinder misfires, symptoms, causes like ignition issues and vacuum leaks, plus diagnostic tips at RepairPal.

Find your OBD-II Trouble Code Check engine light on? Find your trouble code and get help with diagnosis and repair.

May 15, 2011 · The code is P0303 #3 engine missfire. I have changed the spark plugs, wires, distributor cap and rotor, distributor, and recently replaced the head and re did the timing and …

Jan 20, 2011 · Troubleshoot engine misfire code P0303 on your 2003 GMC Sierra 1500. Check spark plugs, ignition coils, and fuel system for effective solutions. RepairPal

Feb 4, 2012 · new plugs and injectors. where is cylinder #3 located on my engine acceleration to 40 mph lack power and misfires at 60 mph smooths out.

Explore P0301 code details including causes, symptoms, and diagnosis for Cylinder 1 misfire. Get expert troubleshooting tips and solutions on RepairPal.com.