misfires on all 6 cylinders…doesnt do it all the time

ran a scanner on it and it gave 2 codes…first one said ignition coil A primary/secondary circuit second code was AF/02 sensor data

My car has 210000 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
The most likely cause of this issue would be a wiring issue to the ignition coils. Since all cylinders have a separate ignition coil, one of the few things that can cause the engine to misfire on all cylinders would be the wiring harness that connects the ignition coils to the pcm. I would recommend having this wiring harness tested by a qualified professional.

How to Identify and Fix Common car Problems ?

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A cylinder 6 misfire could be caused by a wide range of reasons, including a faulty ignition system, a worn spark plug failing to generate a high intensity spark or low engine compression. Here are the common reasons for a misfire on cylinder number 6: Worn out spark plugs, spark plug wire, or spark plug boot.
From the spark plugs to the ignition coils, many different things can cause an engine to misfire. The most common causes of misfires are worn, improperly installed, and mishandled spark plugs, malfunctioning ignition coils, carbon tracking, faulty spark plug wires and vacuum leaks.
A cylinder misfire, also known as an engine misfire, can happen for a few reasons. Essentially, a cylinder misfire is when a cylinder stops producing power. In older vehicles, a common cause for engine misfires is the spark plug, which is built to last for around 12,000 miles.
Causes of lean misfire that only affect one cylinder include a dirty fuel injector, an open or shorted fuel injector, or a problem in the fuel injector driver circuit (wiring or PCM). Compression problems that may cause a misfire include a burned exhaust valve, bent intake or exhaust valve, or leaky head gasket.
A clogged or failed exhaust gas recirculation or crankcase ventilation valve or faulty oxygen sensor can send the wrong signals to the computer and cause misfires.
A bad or faulty connected VVT solenoid can and often does cause engine knocking, inconsistent idle and acceleration problems. The issue could be with the solenoid itself or the electrical harness connected to the VVT.
A partial misfire means there`s some kind of a burn, but significantly incomplete combustion. An intermittent misfire (dead or partial) occurs only sometimes, be it under certain conditions or indiscriminately. All of the above can affect one or multiple cylinders, dependent on the root cause.
All input and output engine management devices (i.e., sensors, ignition coil packs, etc.) are connected via electrical circuits. Problems within these circuits, such as damaged wiring or a loose connection, can cause engine misfires.
Dirty fuel injectors may cause your vehicle`s engine to misfire. This problem makes the motor feel as though it is sputtering — sending vibrations through the car. Such misfires can happen when a fuel injector problem mixes up the delicate balance between fuel and air entering the engine.
A leak into the intake port of a cylinder can cause a lack of fuel. Vacuum leaks on individual cylinders commonly occur around intake-port gaskets or vacuum-hose connections. Depending on where the vacuum leak is on the manifold, it can generate random or specific cylinder misfire codes.
Good quality fuel injectors rarely cause misfires whereas, poor quality or faulty injectors cause destructive misfires. The vehicle can experience various misfires when a faulty injector is a reason; it can lead to a loss in acceleration, power, and reduction in fuel efficiency.
A Bad Crankshaft Position Sensor

The crankshaft position sensor monitors the position and rotational speeds of the crankshaft. Without the crank sensor, the engine control module (ECM) wouldn`t know when to fire the fuel injectors and ignite the spark plugs.

A bad oxygen sensor, mass air flow sensor, manifold pressure sensor, throttle position sensor, a stuck-open exhaust gas recirculation (EGR) valve or an engine vacuum leak can cause a lean running engine, which can cause a backfire.
One of the most common causes of engine misfires is a faulty EGR valve. The EGR valve is responsible for recirculating exhaust gases back into the combustion chamber. This helps to reduce emissions and improve fuel efficiency. However, if the EGR valve becomes clogged or damaged, it can cause an engine misfire.
Misfires that turn on the check engine light and log a cylinder-specific fault code are the easiest to diagnose. A flashing check engine light and a P0301 to P0312 diagnostic trouble code (DTC) is a surefire indication that one or more cylinders are misfiring.
Common signs of a faulty VVT solenoid include the Check Engine Light coming on, dirty engine oil, rough engine idle, and decreased fuel economy.
Engine Misfires: A failing camshaft position sensor can cause your engine to misfire. Transmission Shifting Problems: The data sent to the engine control module can stop the transmission from shifting properly.
MALFUNCTIONING AND FAILED SENSORS Oxygen sensors can fail when the sensor`s ceramic element is exposed to certain types of silicone compounds or when an oil-burning engine leads to the sensor becoming oil-fouled. Also, a small amount of tetra-ethyl lead in the gasoline can kill an oxygen sensor.
The type “A” misfire is the most serious condition and indicates impending catalyst damage. If detected, the Malfunction Indicator Lamp (MIL) may flash once per second to alert the driver that immediate service is required.
There are several types of engine misfires, including lean misfires, ignition misfires, and mechanical misfires.
Misfires don`t simply go away – they need to be addressed immediately. Even if they don`t get worse, they certainly won`t get any better unless you take the car to a mechanic.
Generally, misfires are caused by either a spark or fuel issue or in cases, a combination of both. Spark related problems generally will result from things like ignition coils, crankshaft position sensor, spark plugs, spark plug wires or ignition modules not working properly.
Once the engine is cranked, you should look for blue sparks along the spark plug gap. If you can see blue sparks, this proves your ignition coil is working correctly. If you don`t see blue sparks or you see orange sparks, this is a sign that there`s a problem with your ignition coil.
The Most Common Reasons Why An Engine Will Misfire

The first reason for a car misfiring is a bad ignition coil or bad spark plug. Another leading problem could be fuel-related such as a poor fuel injector or fuel pump. In some rare cases, it could be a low engine compression.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Hi James, engine lite on, cylinder misfire on 1, 3, 5, and 6. recently replaced all plugs and wires. question is does it do any go
ANSWER : Hi there. What led you to the need to replace those mentioned parts? What were the diagnostic steps to determine the fault or faults? When a misfire code is stored, that means that the ECM detected a slow down on the combustion stroke of those cylinders specific to the codes stored. What caused the misfire? The ECM does not know why this occurred, only that it has detected the occurrence. There could be a whole host of causes from electrical to fuel to spark to a sensor to the ECM to an internal mechanical fault. The simple fact is that without a proper inspection using proper diagnostic tools and processes, the attempted repairs can become very expensive. I strongly suggest having a qualified technician perform an inspection to avoid replacing unnecessary parts. Your Mechanic has several available technicians that can assist you with a check engine light inspection.

My 2014 dodge journey has tried to overheat 2 times in 6 weeks. Both times tge coolant level was low.
ANSWER : Hello there. If the dealership has indicated that you have coolant inside of a cylinder, then it is quite likely that the head gasket failed, causing coolant to seep into the oil galleys and into the combustion chamber. However, a blown head gasket is a symptom of an overheating problem; typically not the reason the engine overheats in the first place. Common causes of overheating include a water pump that has failed, thermostat failure, leaking coolant lines, obstruction in the heater core or a coolant fan failure. Ask the mechanic a few questions to get some details. First, is there coolant in the engine oil? And second – is the head gasket damaged? If this is the case, major engine repairs are likely.

Random Misfire on Nissan Sentra
ANSWER : There are at least two recalls of the 2003 Sentra involving engine management issues. Consequently, you should first check your VIN at the NHTSA website to see if your vehicle is affected by any recalls. Carefully check the EGR system. If EGR is stuck open you can get global misfiring. Check the integrity of the PCV system, too. The fuel system needs to be ruled out including the mundane, but real, possibility that you have a tankful of bad gasoline. The actual fuel system pressure should be tested and verified against factory specifications. Injector operation should be verified. PCM failures that can account for global misfiring are rare but they do happen. It will be helpful to look at the engine operation using a real time scanner and also download freeze frame data from the misfiring episodes. If you want these diagnostic steps performed by a certified Mechanic, dispatched by YourMechanic right to your location, please request a misfiring diagnostic and the responding certified mechanic will get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

At times my jeep will start fine and at times I have a hard time getting it to start. It seems like the wireless ignition node is
ANSWER : The recommended diagnostic to resolve this is a hard starting diagnostic. The work is performed by a certified mechanic right at your location. Among the first things the mechanic will check is whether required maintenance is up to date because old spark plugs, clogged fuel and air filters, and the like are potential causes of the hard starting you are describing. Other possible causes include a failing coolant temperature sensor, or bad connection to the sensor, problems with other sensors such as the cam and crankshaft position sensors, a defective fuel pump, and many other causes, all of which will be familiar to YourMechanic’s experts. With regard to the fuel pump, if the engine is not getting enough fuel it will be hard to start. If you request a hard starting diagnostic, YourMechanic will get this issue diagnosed and resolved for you.

What would cause 1st cylinder misfire, multiple misfire, all fuel injectors circuits open and o2 sensors heater circuit high on a 2008 Dodge Charger
ANSWER : Hello. It sounds like you may have the wrong parts installed on the car. Due to the fact that multiple people have worked on it you may have some parts that do not meet specifications. From what it sounds like to me though you either do not have an ECM in the vehicle with the correct programming or you have a connection issue. If all of the grounds are not clean and tight then that will cause this. if they are then the computer needs to be programmed to your vehicle at the dealer and that may take care of it.

need a way to retain the timing chain
ANSWER : The best way to approach this unfortunately is by using a timing chain tool retainer/holder tool. You may consider having an expert from YourMechanic come to your home replace the timing chain.

Timing chain positioning
ANSWER : This system is a bit complex. I can give you some instructions, but I highly recommend getting a hold of a repair manual or purchasing a yearly subscription for just your vehicle from AllData. It is only $25 for a years subscription from AllData.

There are two separate sets of marks on this system. One set is for aligning the timing chain to the camshaft gears and the intermediate shaft gear. There will be marks on the chain that raps around the crankshaft gear as well. These marks will not line up after you turn the motor over.The other marks are on the inside of the camshaft gears and align with the cylinder head parting line. If you were to draw a ling through the center of both camshaft gears, they should line up with that imaginary line.

The crankshaft key way should be aligned with the mating face of the main bearing cap. You can confirm it is in the correct position by verifying the number one piston is at top dead center. If you have removed the balance shaft timing chain, these marks really need a visual diagram to understand where they should be aligned. Without a diagram I am not very confident it can be explained very clearly.

This may be difficult to to follow, so again I highly recommend purchasing a repair manual in digital form or a book. If you feel this is over your head, I recommend the following inspection to help you out. Timing chain replacement

Good luck! I hope I was able to help you.

Do mechanics charge to check the timing on a vehicle and, can my tensioner locking up throw the timing off on my vehicle?
ANSWER : Hello. Unfortunately, the misfire has nothing to do with the tensioner. A misfire will almost always be due to an ignition problem. You will need to have the misfire diagnosed again. Since the timing is a more involved component to look at, a mechanic will charge to check the timing and any other components unless the inspection is already included as part of another service. If you need help diagnosing the misfiring problem, a certified technician from YourMechanic, can come to your car’s location to give a second opinion on the car and can follow through with appropriate repairs.