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Error Code P0340: What’s the Solution?

Car fault code P0340
Car fault code: P0340

Error codes can be intimidating, especially if you’re using an OBDII scanner that doesn’t automatically tell you what the code means. 

Luckily, the internet makes finding the definition for virtually any error code extremely easy. Most likely, that’s why you’ve found yourself here, and you’re in the right place! Continue reading to find out what P0304 code means, the causes, the symptoms, and the solution!

What Does the P0340 Error Code Mean? 

There are several different reasons that may cause the P0340 error code. That being said, this code generally means that the ignition spark and the fuel injection timing are off. For a vehicle to start and crank successfully, the two need to be in sync. 

Whether you’re driving a  Toyota, Nissan, Honda, Ford, Chevrolet, Dodge, GM, your car could suffer from the P0340 code. 

What Causes the P0340 OBDII Error Code?

If you’re picking up the P0340 error code on your OBDII scanner, there are a few potential causes. 

One of the most common causes is a faulty power-train control module (PCM). This control module affects over 100 different factors in your vehicle. Needless to say, it’s quite important. A faulty power-train control module can cause a P0340 error code as well as several other issues. 

Alternatively, you might be seeing the P0340 error code due to a variety of shorted, corroded, or otherwise defective sensors. A faulty crankshaft position sensor or camshaft position sensor are the most common culprits.

Additionally, the circuit wiring or circuit connectors associated with these sensors could also be causing the dreaded P0340 error code. 

What are the Symptoms of the P0340 Error Code?

For those without an OBDII scanner, there are a few tell-tale symptoms that could indicate the presence of the P0340 error. 

The most obvious and noticeable symptom is the inability to crank. If the vehicle has a particularly rough start, this could also be the symptom of the P0340 error. 

Even worse, the P0340 error can sometimes cause vehicles to stop working in the middle of a drive. There are few situations more panic-inducing than your vehicle turning off in the middle of the road. 

This is one of the many reasons to have an OBDII scanner around, so you can catch these issues before they become that serious. 

Additionally, if your vehicle is suffering from the P0340 error, you may notice that your “check engine” light is on. This light is located on the dash of most vehicles and will typically be either yellow or red. 

How to Fix the P0340 Fault Code

Having an OBD2 scanner around can help you to catch these issues before they become that serious.
Having an OBD2 scanner around can help you to catch these issues before they become that serious. 

Sadly, the presence of the P0340 error code is a pretty severe issue. That being said, if you encounter this error code, you probably shouldn’t attempt to fix it yourself unless you’re pretty experienced in automotive repair.

Resolving the P0340 error code is as simple as replacing the defective part or parts that are causing the error code. Depending on the defective part, this can either be a moderately easy fix or a fairly difficult one. 

Whether it’s you or a professional mechanic resolving this problem, it’s important to check other systems and parts related to the part or parts being replaced. Quite often, when a certain part of your vehicle begins to act up, it can negatively affect other aspects of the vehicle. 

If the job at hand is beyond your level of expertise, it’s best to take your vehicle to a professional mechanic or automotive repair shop. 

How to Know Whether or Not the Problem is Fixed

If you’ve taken your vehicle to a mechanic, the problem is, for the most part, out of your hands. If the mechanic that you chose knows what they’re doing, they’ll make sure that the problem is completely resolved before they say that the job is finished.

On the other hand, if you’re taking care of this issue yourself, you’ll need to personally make sure that the issue is truly resolved. Even after replacing the part or parts that seem to be the cause of the issue, it’s smart to check. 

After all, there could be several factors causing this error code at once. Additionally, the defective part or parts could have caused other issues to arise. 

After applying the repairs, you should connect your OBDII scanner to your vehicle if you have one. If you’re aware of the P0340 error code in the first place, chances are you or a friend have an OBDII scanner to work with. 

Once you’ve connected your OBD2 scanner, the rest of the process is pretty self-explanatory. If you’re no longer getting the same P0340 error code, the issue has likely been resolved.

However, this doesn’t mean that your vehicle is no longer at risk. It’s important to check for other error codes as well, considering a defective part can easily cause other problems. 

If you’re using a good OBDII scanner and no other error codes come up, your vehicle should be in good shape.

The Bottom Line

Hopefully, this article has shed some light on your P0340 error code situation. There are several potential causes, but this should greatly narrow the range of issues that you need to check for. Hopefully, you caught this error code before the problem became too serious. 

Read more another OBD2 code: Error Code P0455: What Should I Do?

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