Code 2305 coil #2 no spark.

Changed both 0xygen sensors, pressure checked each cylinder, changed spark plugs, wires, and ignition coil. Still no spark at all from coil #2.

My car has 137000 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
Hi. This sounds like there may be an issue with the wiring harness that is coming from the powertrain control module (PCM) to the ignition coil causing no spark in coil number two. There could be a short to ground in the wiring harness, or broken or corroded wiring in the harness. These are the most likely causes of this problem. In some rare cases the PCM has a fault causing the number two coil not fire. All of the wiring from the ignition coil to the PCM needs to be inspected and tested before replacing the PCM. A certified YourMechanic technician could help you diagnose this issue by inspecting the vehicle for any electrical issues and suggesting any necessary repairs.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

If the ignition coil does not have spark, it`s time to check its wires. Use a test light to check the continuity on the signal wire and power wire on the ignition coil. If both wires are functional but the coil fails to produce spark, the ignition coil or the ignition control module is bad.
If no spark appears, check for broken wires, shorts, grounds or a defective stop switch. Once you have confirmed that the stop switch is working, reconnect the spark plug lead.
The P2305 code means a fault is present in the secondary circuit of the ignition coil B. The ignition coils are used to ramp the electricity up from the battery to provide the spark that ignites the fuel. When this malfunction is detected a Check Engine Light is enabled and will be visible on the dashboard.
Ignition coils tend to fail because of bad spark plugs or plug wires. If your vehicle`s fuel-to-oxygen mixture is either rich or lean, therefore, your ignition coils may fail prematurely. Additionally, engine heat and vibrations can cause damage to ignition coils.
If you do not see a spark, there is an ignition problem. Remove a plug wire and insert an old spark plug or a spark plug tester into the end of the wire (the plug boot). Place the spark plug on a metal surface on the engine, or ground the spark plug tester to the engine. Then crank the engine to check for a spark.
If your engine is not sparking, it may be due to a problem with the CDI box. However, other potential causes of no spark include issues with the ignition coil, spark plug, or wiring.
If the ignition relay shorts, burns out, or otherwise fails while the engine is operating it will cut off power to the fuel pump and ignition system. This will cause the vehicle to immediately stall due to fuel and spark being cut off.
The ignition control module is a solid-state switching device that controls the operation of the ignition coil or coils. It is a small, high-current circuit used to ground the negative side of the coil in order to build charge.
What is an Ignition Control Module? The Ignition Control Module (ICM) is a part of your furnace with one primary function: to light the burners. It receives a signal from the thermostat to start. It sparks (direct spark ignition) and sends power to the gas valve.
Code P0351 is defined as “Ignition Coil `A` Primary/Secondary Circuit Malfunction.” It`s an OBD-II diagnostic trouble code (DTC) that indicates a fault with ignition coil `A` (a problem with the coil on cylinder #1 or its circuit).
The P0350 code refers to an input problem relating to the engine`s ignition coils. The PCM controls and monitors the performance of the ignition coils. A malfunction will have potentially significant effects on your vehicle`s engine performance depending on the severity of the malfunction.
If your car is showing engine code P2305, that means that there is a voltage problem that is affecting the vehicle`s ignition. The issue is generally caused by either a faulty ignition coil or a faulty sparkplug and should be addressed right away.
3 coils is all that is required on these vehicles because of the coil and spark plug wire set-up.
If your engine misfires or stalls when you are idle or when you stop suddenly or accelerate, there could be a problem with your ignition coil. A misfire — which can sound like a coughing or sputtering noise or feel like a jerk or strong vibration — means that one of the engine`s cylinders is not firing correctly.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

2013 CR-V EX-L. P0304 code. It is not the spark plugs or the coils. One of the wires of the connector to the 4th coil is open.
ANSWER : I would suggest going online and getting a wiring diagram for your vehicle. Most of the time, the coil wires will trace back to the control module. You can do a continuity, or resistance, test to figure out where the wire is broken, or what is causing the problem. I would suggest putting one probe on the connector and just start tracing the wire back until you find the break/short. Keep in mind, that if the wiring checks out, it is possible that there could be a problem with the control module itself. If this is something that you feel you could use a hand with diagnosing/repairing, contact a certified mechanic, like the mobile mechanics available at YourMechanic.com.

Read Full Q/A … : Code 2305 coil #2 no spark.

Code 2305 coil #2 no spark.
ANSWER : Hi. This sounds like there may be an issue with the wiring harness that is coming from the powertrain control module (PCM) to the ignition coil causing no spark in coil number two. There could be a short to ground in the wiring harness, or broken or corroded wiring in the harness. These are the most likely causes of this problem. In some rare cases the PCM has a fault causing the number two coil not fire. All of the wiring from the ignition coil to the PCM needs to be inspected and tested before replacing the PCM. A certified YourMechanic technician could help you diagnose this issue by inspecting the vehicle for any electrical issues and suggesting any necessary repairs.

Read Full Q/A … : Code 2305 coil #2 no spark.

Spark plug chaos. Rubber stoppers are preventing the spark plugs from coming out.
ANSWER : Hi there. Try using a pair of small needle nose pliers to pull off the rubber boots from the spark plugs. As you pull, twist the rubber boots to break them free. If you cannot get the rubber boots off, then try using some mineral oil on the boots to aid them off, then clean off the oil with soap and water with degreaser. If you need further assistance with removing the boots from the spark plugs, then seek out a professional, such as one from Your Mechanic, to help you.

Read Full Q/A … : Code 2305 coil #2 no spark.

Engine light fault. There was a bad spark plug and a failed ignition coil. Replaced both the coil pack or spark plug.
ANSWER : Hi there. If the light is coming on then shutting off and returning on, then if the issue is for the same coil, there could be an issue with the wiring on the coil plug. Check the wiring on the coil plug and see if the wires are split, broken, or burned. If there is nothing wrong with the plug, then the main engine harness has an issue / short and may need replaced. If you need further assistance with your ignition system, then seek out a professional, such as one from Your Mechanic, to help you.

Read Full Q/A … : Code 2305 coil #2 no spark.

It threw a code 21 , throttle position sensor bad code. i replaced it and the code went away but i still have no spark.
ANSWER : Hello and thank you for contacting YourMechanic. The problems that you are encountering with your vehicle, could be caused by the harness to the Throttle Position Sensor (TPS) or the computer itself.

Check the harness to the TPS for any debris or any corrosion. Hook up a paperclip to the harness and turn on the key. Use a multimeter and check for voltage at the pins of the harness. Make sure that the ground on the sensor is grounded and has no resistance. If you find that the harness is having too much resistance, then I recommend having the main engine harness replaced. If you have replaced the harness and still have the same problems, then the computer will need to be flashed or replaced.

I recommend having a professional, like one from YourMechanic, come to your home to diagnose your car’s no start condition before replacing any parts.

Read Full Q/A … : Code 2305 coil #2 no spark.

What does it mean if cylinder 2 and 6 are not firing and it is not the plug, plug wire, or coil because they have all been changed.
ANSWER : Hello. If the misfires are continuing to occur and the ignition parts are good then it may be a faulty fuel injector or an issue within the engine. I usually do a compression test first. By doing this I would know if the problem was internal such as a valve seat failure. If the compression test comes back fine then I test the injectors on those cylinder to make sure that are fine. If those happen to be good also then there is more than likely a problem within the circuit that is causing this and further diagnosis will need to be dine. If you need to have this misfire fixed, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose and repair this.

Read Full Q/A … : Code 2305 coil #2 no spark.

What repairs fix codes P0172 and P0304? I just had all the spark plugs replaced recently.
ANSWER : The P0304 code indicates a misfire has been detected on cylinder 4. The P0172 code indicates that the fuel mixture is richer than the mixture control can compensate for. It’s possible that they are related, but not necessarily. Rich mixture can be caused by excessive fuel pressure, or sometimes by leakage at a fuel injector. If your misfire is caused by leakage at injector number four, then it’s likely that the two codes have a common cause. It’s also possible that you have had a spark plug foul because of a rich mixture. Again, that would be a common cause. But it is also possible that you have a failure in the number four ignition coil, they are not uncommon. In that case, the P0172 would be a separate issue altogether. If I were working on the car, I would try to determine the cause of the over rich mixture and then work from there. In any case, you need to have a qualified technician check this thing out. Contact Your Mechanic and they can send a technician to your home or office to check out your car and tell you what needs to be done.

Read Full Q/A … : Code 2305 coil #2 no spark.

Getting 2 then 4 abs codes, brake shutters, speedo dies and engine slowes when Brake and absolutely lights come on,
ANSWER : You definitely want to start by inspecting the front and rear wheel speed sensors; a failure in these circuits will result in several other problems. Begin by connecting a scanner to see if the Powertrain Control Module (PCM) is registering the sensors accurately. With the scanner, you should be able to monitor all the wheel speed sensors while driving. Keep in mind, the rear wheel speed sensor is mounted on the transmission and is the sensor that runs your speedometer.

Once you determine which sensor is not registering, visually inspect the wiring harnesses and, if everything looks good, replace the sensor. In most cases, the sensor is the problem. If you suspect a wiring problem that isn’t visually apparent, you will need to do a continuity test from the PCM to the sensor connector.

If you determine that all the speed sensors are good, you should suspect a problem with ABS pump. The C0267 trouble code indicates there is a wiring problem in the harness to the ABS pump. It is possible that this is the main problem. To test this, you should disconnect the connector from the ABS pump and visually inspect the pins on both ends. A continuity test should be performed in this harness as well.

There are more test procedures for this that are a bit involved. If you are interested in digging more into this, you should pick up a factory repair manual, not a Chilton. The factory repair manuals are superior and you definitely want good information to make a correct diagnosis of your car.

If you need help with this, I recommend an "ABS light is on" inspection.

Good luck!

Read Full Q/A … : Code 2305 coil #2 no spark.