What is scan code P1399 and how to fix the problem.

The OBD-II error code P1399 and P0141 for a Honda CRV 1999 are as follows:
P1399 - This code indicates that there is a problem with the misfire detection system in the vehicle. This code is often accompanied by other codes that indicate which specific cylinder is misfiring. Causes of this code could include a faulty ignition system, a clogged fuel injector, or a problem with the engine control module (ECM).
P0141 - This code indicates a malfunction in the oxygen sensor located on Bank 1, Sensor 2. This sensor measures the oxygen content in the exhaust gas after it has passed through the catalytic converter. Causes of this code could include a faulty sensor, a damaged sensor wiring harness, or a problem with the vehicle's computer.
It is recommended that you have a certified mechanic diagnose and repair these issues to ensure proper operation of your vehicle.

Contact local AutoZone or other reputable parts supply store and request definition of code p1399 and recieve info. on price and availabillity of failing part.This code from what you have described is very important to resolve.Hope this helps you.

Tech notes
Adjusting the valves will usually fix this problem.
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

code po420 refers to cat converter system bank1 - efficiency below threshold===causes -- cat converter---wiring---HO2S 2
code p1399 refers to cylinder no 6 misfire===causes --fuel/ ignition---VTEC system---MAP sensor--wiring---mechanical fault.

the po303 is cylinder 3 misfire and other code could be trans code or abs or body code i know yhe one for sure

CHECK THE DISTRIBUTOR AND DISTRIBUTOR CAP FOR CORROSION PRETTY COMMON ON THOSE HONDAS.

P1399 is a random engine misfire.

Code P1399 is specific to Honda - it is an error code for "multiple variable misfires detected". P0301-P0304 are common OBDC codes for all cars, specifically "misfire in cylinder X".

You will get the P0301-P0304 codes on your OBDC reader when you plug it in (if actually errors), but will only find the P1399 if you select Honda as the manufacturer.

Just got these errors today on my CRV 2000. Now I have to figure out what is causing two of the cylinders to misfire.

P1361 is an intermittent signal from the TDC sensor .. thats located under the top timing belt cover on the right side of the engine .. about half way down that cover is the connector for the TDC sensor .. check that connector and its wiring ...P1399 is an ignition problem .. and thats likely caused by the TDC sensor being intermittent .. you might be able to fix the connector if its loose or full of water but the sensor is hard to get to .. very tight place to work in but not impossible .. this is something that should be fixed soon .. no emergency but the timing may drift off if the problem persists ..