Question about 2001 Honda Accord
P1399- Manufactures control Ignition system OR Misfire
If only one of your cylinders was misfiring, you probably would be getting a more specific code than P1399.
Also check the distributor rotor along with the cap and coils and wires; the EGR valve to make sure it doesn't leak; your fuel pressure which can cause random misfires if the pressure is too low; and injectors if they are really dirty. If you have really high mileage, I probably would first just change out the plug wires with a new set, then reset the DTC and see if the code comes back.
Posted on Sep 30, 2010
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Posted on Jan 02, 2017
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