What are the codes for a cylinder misfire?
When a cylinder misfire occurs, ECU (Engine Control Unit) will generate one or several DTC’s (Diagnostic Trouble Codes) such as P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, P0309, P0310, P0311, or P0312. Last two digits of the DTC codes indicate what cylinder is misfiring. For example, P0303 means misfire was detected in cylinder # 3.
Where can I find the misfire code for spark plugs?
Diagnostics > By Trouble Code > P0300 P0301 P0302 P0303… People ask me about misfire codes after they’ve replaced all the spark plug wires, coil, and plugs and they still have the code.
Can a misfire be caused by faulty ignition?
A misfire can certainly be caused by faulty ignition. But it can also be caused by poor fuel mixture—too much air or too little gas. Let’s look at the possibilities. In a “too-lean” mixture situation, there’s too little gas present to make a good long fire.
How often does a PCM detect a misfire?
The PCM measures how often a misfire happens within two different rpm windows to determine the frequency/severity of a misfire. It stores misfires within a 200 rpm window of time and also within a 1000 rpm window of time. Obviously, a misfire that happens multiple times with a 200 rpm window is the most serious.
What causes a P0300 to misfire on multiple cylinders?
Infrequent misfires are recorded but not tied to a particular cylinder, and on some platforms, this stores a P0300. Typically, any situation that isn’t tied to a particular cylinder but is causing misfires on several different cylinders is suspect. Fuel contamination would be one possibility.
Is it OK to ignore engine code P0300?
You should never ignore engine code P0300 because misfires can result in very expensive repair costs. There are many things that could cause misfires and finding out the root of the problem can be a real challenge.
What does the last number in p0302 mean?
The last number in these accompanying codes refers to the affected cylinder. A P0302, for example, indicates a misfire on a particular cylinder (in this example, cylinder 2). Cylinder number 2 would refer, not to the second cylinder in the firing order, but the cylinder numbered “2” in the arrangement of cylinders on the engine.
Codes P0011, P0012, P0014, P0015, P0021 and P0022 relate to camshaft position and timing. Codes P0016, and P0018 relate to crankshaft position correlation. Code P0300 relates to Random / Multiple Cylinder Misfire Detected. Maybe this would help narrow the problem down a bit. You are concentrating on the igniton part of a misfire.
Why did I need a new oil filter on my Kia?
Perhaps the reason the new plugs helped a little is because the mis-fire fouled a plug or plugs a little. A Kia TSB (Technical Service Bulletin) written for Kia technicians says that even using an aftermarket oil filter can affect oil flow rates and they say to make sure the filter is OE not aftermarket.
What kind of valve timing does a Kia have?
I Believe This Kia Has CVVT (Constant Variable Valve Timing). Are you getting a fault code for a misfire on cylinder #3 and is that the only code (s) you have retrieved ? Since switching coils around didn’t help, maybe the problem is with the valve timing system, even the OCV (Oil Control Valve) component.
Is the Kia powertrain warranty still in effect?
If the car’s Powertrain Warranty is still in effect, I suggest that you allow a Kia dealership to do the diagnosis and necessary repairs, gratis. I’m Not A Pro Mechanic, So Take This Advice Accordingly. I Believe This Kia Has CVVT (Constant Variable Valve Timing).