Hi all, a friend used his reader and saw this code. 2015 F150 Lariat, 3.5L twin turbo. I read it can a variety of things from plug wires, plugs, coils, catalytic converter to name a few. Is there a way to pinpoint it instead just trying things to see if it corrects it?? The misfiring only seems to happen when I go to pass or really get on it. Seems ok with normal acceleration. Thanks for any help in advance.

 

It is highly unlikely the DTC is P3010 so I'm going to assume the code is actually P0301 which refers to Cylinder No. 1, the front cylinder on the passenger side.

There are no "plug wires" as such as the engine uses COPs (Coil On Plug). It would be nice to know what mileage the truck has and how the truck is used. It won't correct itself and likely not a catalytic converter problem as that would cause other codes. The PC/ED (Powertrain Controls/Emmisions Diagnostic) Manual shows the following possible causes:

• Ignition system
• INJ-1
• Running out of fuel
• EVAP purge valve
• Fuel pressure
• Evaporative emission system
• EGR system
• Base engine
• Misfire monitor neutral profile correction has not been relearned since the last mechanical repair

Since you are only getting one code, it narrows it down to spark plug, COP, or wiring running to the COP. Anything else would likely cause additional DTCs to be present.

If it were my truck, I'd start by pulling the spark plugs and checking them. If the plugs look good I would still replace them if the mileage was 70K or more. While changing the plugs, I would visually inspect the coils and boots looking for cracks, corrosion, or signs of arcing. If everthing looks good and it still misses during hard acceleration after re-installing everything, then swap COPs from Cyl-1 with Cyl-2 (or any other cylinder) and see if the DTC moves to that cylinder. That would indicate a problem with the COP. If it doesn't move, then closely inspect the wiring harness and electrical connector at the COP for damage or corrosion. Further analysis would require a more indepth diagnosis if the problem has not been resolved by then.

 

Thanks, it is normally my daily ride, it has 75K on it. I do like to get on it though to pass and it sounds nice so that is the hardest it is driven.