p1399 is manufacturer control ignition system or missfire, this code could be coils,plugwires, or plugs,
A P1399 code is a cylinder 1 misfire code
P1399 Random/multiple misfire detected.
P1399 is a pending code for random or multiple cylinder misfires.
Trouble code P1399 means: Multiple / Random Misfire Detected
Random/multiple misfire detected.
Trouble code P1399 means: Multiple / Random Misfire Detected Check gap of spark plugs or replace them
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P1399 is multiple/ variable misfire detected. Many people have tried to fix this problem by doing major tune ups but no luck. The majority of the time, the problem is in the cylinder head, more than likely burnt valves or the valves need to be adjusted.
Trouble code P1399 means: Multiple / Random Misfire DetectedYour car is 12 years old. Replace the spark plugs and plug wires.
This is a Honda only code which means you have a random cylinder misfire. If you have not replaced the Spark Plugs & Wires, do so now. Use OEM spark plugs.
Plug in an OBD2 code reader. You can borrow, rent or purchase an OBD2 code scanner at most auto parts retailers.