P0340 Ford F150: Must Know Its Symptoms And Causes

What’s the meaning of the P0340 Ford F150 code? The OBDII P0340 code indicates that the Camshaft Position Sensor (CPS) circuit is malfunctioning.

A P0340 error code can be a significant problem that needs prompt treatment, and the underlying cause might result in engine damage if left untreated.

This article will help you to learn why this code occurs and discuss the possible solution for each cause. Therefore, stay with us if you want to take a break from this mess.

P0340 Ford F150: Why and How to Resolve This?

A variety of factors can cause the P0340 error code. Without specialized knowledge, determining the main aspect of the problem will be very troublesome.

It’s a common error that occurs in many Ford cars. If you scroll through the internet, you’ll find many drivers looking for the suggestion of the P0340 Ford F150 error problem.

What are the causes and solutions for the P0340 Ford f150 Eco Boost? The table below will show you the summary.

A camshaft position sensor that isn’t working properlyThe Check Engine Light is on
The camshaft’s reluctor ring is damaged or filthyThe car will not start
Camshaft position sensor circuit wire that is defective, corroded, and shortedVehicle engine misfires
ECM with flawsThe engine may be stalled
ECM might require a software updateLoss of power during driving

Many Ford cars go through this error code, and quite surprisingly, they all carry out similar symptoms and causes.

So, if you have similar problems, go through our next section, which are possible solutions for some of the causes explained above in the table.

Defects Inside the CPS Circuit

If you have a problem related to P0340 Ford F150 5.0, you’ll come across a warning to check the engine light. When that light turns on, you should know there are some problems inside the CPS circuit.


Bring the car to auto repairing services as soon as possible if the OBDII scanner displays a P0340 code, which indicates a faulty camshaft position sensor circuit.

Otherwise, the prolonged operation wouldn’t only be complex due to poor engine performance caused by misfires, but it’ll also endanger the engine.

Damaged Reluctor Ring

The magnetic sensor is activated as the crankshaft rotates by notches in the reluctor ring located on the crankshaft. The Electronic Control Module, AKA ECM, which controls ignition timing, receives information about the position from the magnetic sensor.


Check if your camshaft sensor is giving any voltage reading on the voltmeter. If you don’t see the cursor moving, the problem may arise inside the reluctor ring.

Open the sensor casing and if you notice a damaged reluctor ring, replace them with new ones. You can always order them online, and they’re also available in the local automobile store.

ECM May Contain Some Flaws

One of the most crucial parts of every contemporary car is the Engine Control Module, known as ECM. The primary onboard computer’s job is to consistently ensure the engine produces the maximum amount of power and efficiency.


One way to have a clear diagnosis of your car’s ECM is By checking the inputs and outputs of the module to identify which sections are working correctly.

Your battery, ignition switch, fuses, and sensors will be the inputs. Whereas the fuel injector, the fuel pump, the spark plugs, and the starter will be the outputs for your test.

Now apply an accurate observation to your engine’s computer display. If you don’t see any satisfying readings on the graphs, then the test’s results are telling you to replace your ECM module’s whole setting.

ECM Might Need a Software Update

It’s a good practice to update the software of your car’s ECM, and this will increase your vehicle’s response while reducing transmission wear and tear.

Aside from ensuring that your transmission and gearbox are working as they should, you’ll also need to ensure that your ECM controls are optimum.


You’ll require a Flash Bootloader to update the software of your car’s chip. Connect the ports of your ECM to the Bootloader and look for the options for Update using Bootloader.

After 10-15 minutes of waiting, your ECM will be up to date.

A Helpful Tutorial You May Need!

Frequently Asked Questions (FAQs)

What does error code P0340 mean?

This type of error code is associated with Ford cars, where the problem mainly arises with the functionality of the Camshaft Position Sensor. Your vehicle’s performance might deteriorate for this code, and your engine will be stalled if this matter isn’t taken seriously.

How do you reset throttle position sensor on Ford F150?

One of the easiest ways is by unhooking the negative terminal of the car’s battery for 5-10 minutes. Another alternative also includes removing the fuse of the ECM module.

Where is the camshaft position sensor bank 2 located?

The camshaft position sensor bank 2 is located on the right side of the engine’s motor. If you see any performance issues regarding the sensor, make sure to cool down the motor first and then engage in checking the sensor’s readings.

How do I fix error code p0340?

Apparently, there are numerous reasons for a fault in the 2007 Ford F150 5.4 with code P0340. Some of them are broadly described above the possible solutions are also provided. Do not forget to assess them carefully.


So, what have we learned here today? P0340 is a serious issue and should be resolved immediately.

When you drive through the roads of Manhattan street and hear a beep sound with code written like P0340 Ford F150, you’ll know the possible symptoms and causes for this occurrence.

If you’re not confident enough to take matters into your own hands, we suggest you take your Ford to the local mechanics for repairs.

If you find this article helpful, do not forget to mention it to your friends facing similar difficulties with their Fords.

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D Conroy

Meet our senior writer and content manager of Automasterx. He has worked in several mechanical garages and mastered different vehicle diagnoses and parts repair. He never stops until finding out the ultimate solutions for any vehicle fault code. However, ensuring the only solid solutions for each vehicle malfunction is his core part of the duty, alongside analyzing fault codes and signals.

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