Error codes: P0301,P0302,P0303,P0304,P0306,P1399
Knowledge level: I know little about cars
Help needed: Please help me find out what is going on and how to fix it.
P1399 HONDA - Random Cylinder Misfire Detected
Source of Information: http://www.autocodes.com/p1399_honda.html
Possible causes - Valve clearance out of range - Blocked EGR (exhaust gas recirculation) Passages
Tech notes: Adjusting the valves will usually fix this
When is the code detected? The control module monitors the crankshaft speed and has detected a misfire condition
Possible symptoms - Engine Light ON (or Service Engine Soon Warning Light) - Lack/loss of power - Hard start - Engine hesitation
P1399 Honda Description When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the Crankshaft Position (CKP) sensor signal to vary, the Engine Control Module (ECM) can determine that a misfire is occurring. - Valve clearance out of range
The other codes are secondary codes indicating the cylinder that is misfiring. P0306 for example indicates cylinder #6.