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what is code p1399 diagnostic code

by Tia Wiegand Published 4 years ago Updated 2 years ago

P1399 Quick Facts

  • Most commonly caused by valves that are out of adjustment or an ignition issue.
  • P1399 is a drivability issue and needs fixed as soon as possible.
  • Triggered by variance in the Crank Position Sensor speed (which would indicate a misfire).

On Honda vehicles the OBD code p1399 indicates that there is a random misfire occurring in the engine. In most cases a valve adjustment will correct this issue, however a blocked passage in the EGR (Exhaust Gas Recirculation) system can... All these codes point to engine misfires.

Full Answer

What does it mean when cylinder 4 is misfiring?

Cylinder 4 misfires can be caused by many reasons from a faulty ignition system, fuel system, or internal engine failure. The most common reason for this to happen is faulty or worn-out spark plug coil packs, especially if it's been a while since you had a tune-up.Mar 24, 2022

How do I fix code P0302?

1:252:12How to Fix P0302 Engine Code in 3 Minutes [2 DIY Methods / Only $4.22]YouTubeStart of suggested clipEnd of suggested clipIf the ignition coil is covered with engine oil or stains. Simply clean it with a wd-40 cleanerMoreIf the ignition coil is covered with engine oil or stains. Simply clean it with a wd-40 cleaner otherwise replace the damaged ignition coil with a new.

Can a misfire hurt my engine?

Over time, misfires can also damage your engine. When the fuel in the chamber does not burn properly, it can cause engine damage. As a result, fuel enters the catalytic converter, causing it to heat up, which can damage it. In addition, it can warp the valves and the cylinders, causing them to crack.Nov 30, 2021

What causes a misfire in all cylinders?

Engine misfires can be caused by a list of faults, but there are a few suspects that occur more than others. The primary villains are simple – spark or fuel – usually manifesting in spark plugs, plug wires, the coil(s) or the fuel-delivery system.

How do you know if a spark plug is misfiring?

0:342:22How to Tell Which Cylinder is Misfiring! - YouTubeYouTubeStart of suggested clipEnd of suggested clipWhen a cylinder runs rich it will carbon file the spark plug looking like this. And this will causeMoreWhen a cylinder runs rich it will carbon file the spark plug looking like this. And this will cause it to short-circuit malfunctions. For this condition.

What code is po300?

P0300 is a diagnostic trouble code (DTC) for "Random/Multiple Cylinder Misfire Detected". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation.

What is the most common cause of a misfire?

The most common cause of an engine misfire when accelerating is worn-out spark plugs. When spark plugs are suffering from excessive wear, they don't ignite the fuel in the piston cylinder when they are supposed to. This can also be caused by fouled spark plugs, a cracked distributor cap, or bad spark plug wires.Apr 8, 2020

Will changing spark plugs fix a misfire?

Dirty or Old Spark Plugs If your engine is misfiring, you may be able to fix the problem easily by replacing your spark plugs. Spark plugs are relatively easy to remove from engines and inspect for damage, and at less than $25 apiece, they are relatively cheap to replace, too.

Can a misfire fix itself?

Can An Engine Misfire Fix Itself? An engine misfire won't do a fix itself unless it is external to the engine. The problem will always return, Find the root cause. As a consequence of an ignition misfire happening over time, it won't help when it happens again when it happens repeatedly.Feb 12, 2022

What sensors can cause misfire?

If an oxygen sensor or mass airflow sensor is failing, it could give incorrect data to your engine's computer, causing the misfire. When a vacuum line is broken, it can cause a fuel-injected motor to misfire.Dec 1, 2020

How much does it cost to fix a misfire?

there are two most common misfire causes: Carbon or oil-fouled sparkplugs can cost between $100 and $300; replacing these plugs costs between $400 to $600. You're going to need to replace sparkplug wires, usually between $100 and $300 if they break down.Feb 12, 2022

Can low oil cause misfire?

When an oil filter is bad, it can reduce oil flow, which can cause an improper valve timing, which can result in a misfire. If oil flow is low for a long time, worn engine parts may result in a misfire.Dec 2, 2021

P1399 – Glow Plug Circuit High Side, High Input (Ford)

OBD II fault code P1399 is a manufacturer specific code, and on some applications, this code is defined as “Glow Plug Circuit High Side, High Input”, and is set when the PCM (Powertrain Control Module) detects an abnormal input voltage in the “high side” of the glow plug control circuit on diesel engines.

Step 1

Record all fault codes present, as well as all available freeze frame data. This information could be useful should an intermittent fault be diagnosed later on.

Step 2

Once it is certain that all relevant sensors are working properly, consult the manual on the location of the glow plug control module, as well as the function, and color-coding of each wire in the connector.

Step 4

If all obtainable electrical values fall within specifications, suspect one or more defective glow plugs or glow plug leads. Note however that the definition of this code does NOT specify a specific area of the circuit in which a fault is present- only that there is an abnormal voltage somewhere in the “high” side of the control circuit.

Step 5

If all glow plugs test OK, consult the manual on the correct procedure to test each individual glow plug lead. Note however that since the glow plug control module uses pulse width modulation to control the input voltage to each glow plug individually, an oscilloscope may be required to test each lead.

Step 6

This is not so much a step toward fixing the issue, as it is a recommendation to non-professional, as well as non-dealer mechanics not to proceed with the diagnostic procedure beyond Step 5 if the required equipment, knowledge, and reference data are not available.

P1399 Code failures by brands

P1399 BUICK, CADILLAC, CHEVROLET, GMC: INTERMITTENT WHEEL SPEED SENSOR CIRCUIT 2 - G - SENSOR

Description of DTC code P1399

When the crankshaft speed experiences some changes from the ECM ( Engine Control Module ), these variations are monitored to check and identify various misfires. However, the crankshaft speed changes are not only caused by these failures, as uneven road conditions also cause them.

What causes P1399?

Here are the common issues that commonly cause P1399. They are valves that are out of adjustment and ignition issues. The good news (if you want to call it that) is that usually your Accord will behave differently depending on which one it is.

Why is my P1399 drivability?

Most commonly caused by valves that are out of adjustment or an ignition issue . P1399 is a drivability issue and needs fixed as soon as possible. Triggered by variance in the Crank Position Sensor speed (which would indicate a misfire).

What is the code for a Honda accord?

Honda Accord P1399: Random Cylinder Misfire. P1399 is a Honda specific diagnostic trouble code. It means that more than one of your Accord’s cylinders is misfiring (maybe just one, more on that below), and is most common fix is to adjust the valve lash or replace the bad ignition component.

Can a clogged EGR cause P1399?

Clogged EGR passages have been known to cause P1399, and they are super easy to check. It would be pretty unfortunate to end up doing a whole valve adjustment, only to find that the EGR system just needed cleaning.

My Toyota quartmu 2.5 d it's starting and after some time goes off and code is p1399

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.

Trouble Code p0420 and p1399

code p1399 refers to cylinder no 6 misfire===causes --fuel/ ignition---VTEC system---MAP sensor--wiring---mechanical fault.

I have a 99 Honda civic SI with p1399 code I've

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

2000 honda crv p1399 and p0301 check engine codes

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".

My honda civic 98, had a check light engine ON P1361 and P1399

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 ..

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