It means that more than one cylinder has a misfire history. PO301 would be cylinder number 1 misfire. PO302 would be number 3 cylinder misfire.
P0303 is cylinder #3 misfire. P0300 would be random misfire. Either way you need to diagnose the case of a misfire. Check spark plugs, plug wires(if equipped), cylinder compression, fuel inectors, and wiring.
po300-Random/multiple cylinder misfire detected. po303-Cylinder no. 3 misfire detected. po306-cylinder no. 6 misfire detected po300-Random/multiple cylinder misfire detected. po303-Cylinder no. 3 misfire detected. po306-cylinder no. 6 misfire detected
Cylinder number 3 misfire.
misfire cylinder #3. A 300 code is a misfire code and the last number relates to the cylinder that is misfiring.
Random misfire, cylinder 2 misfire, and cylinder 3 misfire. see related question below.
You should repair it as soon as possible because it can cause the catalytic converter or oxygen sensors to go bad. Then you are spending money you could have saved.
Stop by http://www.coloradofans.com there are different people that have had that problem. you can probably message them personally and see how they got to that problem. P0300= Random/ multiple cylinder misfire detected P0301= Misfire detected- cylinder #1 P0302= Misfire detected- cylinder #2 P0303= Misfire detected- cylinder #3 P0304= Misfire detected- cylinder #4 p0305= Misfire detected- cylinder #5 P.S. These are Diagnostic trouble codes, not vechicle id numbers.
It is probably the coil on cylinder number 4. The easiest way to troubleshoot it is to swap the coils between 3 and 4 and see if the misfire then shows up on three.
It means # 3 cylinder has a misfire. My advice is to replace all the spark plugs, and check the spark plug wires carefully.
One thing for sure is that if you do Not repair it soon, it Can cause the computer to go bad as the excess electricity has to go somewhere. A misfire can be a spark plug, a plug boot, a coil or even a vacuum leak. Take it to a repair shop and have it properly diagnosed.
p0303 is cylinder #3 misfire