What does the code on a spark plug mean?

What does the code on a spark plug mean?

The heat range of a spark plug is the range in which the plug works well thermally. The heat rating of each NGK spark plug is indicated by a number; lower numbers indicate a hotter type, higher numbers indicate a colder type.

How do you read a spark plug code?

“A” indicates a 12 mm x 1.25 with a 3/4″ reach. “Z” indicates a 10 mm x 1.0 with a 1/2″ reach. “G” indicates a 10 mm x 1.0 with a 3/4″ reach. The number (82 in this case) indicates the heat range of the spark plug, the higher the number the hotter the heat range (opposite of NGK and ND spark plugs).

What codes can bad spark plugs cause?

bad spark plugs can cause your engine to misfire. the engine’s computer uses sensors to detect these misfires and will create a code that turns on the check engine light. a flashing check engine light indicates the misfire is severe enough to cause damage to your catalytic converter.

What do the letters in NGK spark plug codes mean?

The first letter of the NGK spark plug code (in this case a “D”) indicates the thread size of the spark plug. There are three spark plug thread sizes currently being used in motorcycles and ATVs. “B” indicates a 14 mm x 1.25 pitch size, “D” indicates a 12 mm x 1.25 size and “C” indicates a 10 mm x 1.0 size. The letter “J” indicates

What do the numbers mean on spark plugs?

The prefix “41” stands for the manufacturer’s product line (e.g., 41 = spark plug). Numbers after the prefix indicate the type of spark plug and also the specific application: · 100 – 199 = Iridium · 600 – 699 = Resistor · 800 – 999 = Double Platinum. Plug Identification Table Suffix:

What does 41 mean on spark plugs?

The prefix “41” stands for the manufacturer’s product line (e.g., 41 = spark plug). Numbers after the prefix indicate the type of spark plug and also the specific application: · 100 – 199 = Iridium · 600 – 699 = Resistor · 800 – 999 = Double Platinum.

What does the letter E mean on spark plugs?

The letter “E” indicates the reach of the spark plug, that is, the length of the threads. There are two size reaches currently being used in motorcycles and ATVs. “H” indicates a 1/2″ reach, while “E” indicates a 3/4″ reach.

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