5 Steps to Fix Dodge Ram 1500 P0340 Code

The Dodge Ram 1500 P0340 trouble code signals an issue with the camshaft position sensor circuit. This sensor determines the camshaft’s rotational speed and position, transmitting the information to the Powertrain Control Module (PCM).

When experiencing the P0340 code in your Dodge Ram 1500, you may notice symptoms such as check engine light, reduced engine power, stalling, and increased fuel consumption. These symptoms indicate that the camshaft position sensor isn’t functioning properly and might cause drivability issues.

Common Symptoms of Dodge Ram P0340 Code

When you encounter the P0340 code in your Dodge Ram 1500, you may experience several symptoms. It is essential to recognize these signs, as they can help you and your mechanic diagnose and fix the problem more effectively. Here are a few common symptoms you may notice:

Check engine light

One of the first signs you will see is the check engine light turning on. This indicates that there is an issue with the camshaft position sensor circuit.

Loss of power and misfire

The engine may experience a loss of power or misfire when the P0340 code is present. This is because the camshaft position sensor plays a vital role in the engine’s timing, and if it is malfunctioning, it will cause a disruption in your engine’s power and performance.

Lack of power

You may notice a decline in your vehicle’s overall power. This could be due to the sensor providing incorrect information to the engine control module, leading to improper fuel and air mixture adjustments.

Rough idle

Your Dodge Ram 1500 may have a rough idle when the P0340 code appears. This is because the engine is struggling to maintain a consistent RPM due to the disrupted camshaft position sensor signal.

Increased fuel consumption

Another symptom could be an increase in fuel consumption. The engine control module relies on the camshaft position sensor data to calculate the optimal fuel and air mixture. A faulty sensor can lead to inefficient combustion and, consequently, increased fuel consumption.

Engine stall

In some cases, your vehicle may stall entirely due to the P0340 code. As the engine relies on the camshaft position sensor signal for ignition timing, a malfunctioning sensor may disrupt the ignition process and cause the engine to stall.

Remember to address these symptoms as soon as you notice them. Ignoring the P0340 code could lead to more severe engine issues or even complete engine failure. It is crucial to consult with a professional mechanic to diagnose and fix the problem efficiently.

Potential Causes of Dodge Ram P0340 Code

There are several potential causes for the P0340 code in your Dodge Ram 1500. Understanding these causes can help you in diagnosing and potentially fixing the issue.

One common cause of the P0340 code is a defective camshaft position sensor. This sensor is responsible for detecting the camshaft’s position and sending signals to the vehicle’s engine control module (ECM). If the sensor is not working correctly, it can trigger the code.

Another possible cause of this code is issues with the wiring or connectors in the camshaft position sensor circuit. This can include damaged or corroded wiring, loose or disconnected connectors, and even short circuits to the ground. Inspecting the wiring and connectors in the circuit can help identify if this is the cause of the problem.

A faulty reluctor ring can also result in the P0340 code. The reluctor ring is a toothed wheel attached to the camshaft that works with the position sensor to detect the camshaft movement. If the reluctor ring is dirty, damaged, or misaligned, it can cause disruptions in the sensor’s signal and trigger the P0340 code.

An issue with the vehicle’s power supply, such as low voltage or fluctuating power, can also contribute to the P0340 code. Inconsistent power supply can affect the camshaft position sensor’s ability to send accurate signals to the ECM. Checking your vehicle’s voltage levels can help determine if this is the cause.

Issues with the vehicle’s ECM can also lead to the P0340 code. A faulty ECM may not be able to properly process the camshaft position sensor’s signals, causing the code to set.

Lastly, mechanical problems with the camshaft or crankshaft can contribute to the P0340 code. If there is excessive wear or damage to these components, it may affect the camshaft position sensor’s ability to detect the proper position and timing of the camshaft.

How to Fix Dodge Ram P0340 Code

When encountering a P0340 code in your Dodge Ram 1500, it’s essential to diagnose and address the issue correctly. The P0340 code indicates a problem with the camshaft position sensor’s circuit. Below are the steps to help you resolve this issue:

Inspect the Camshaft Position Sensor

The most common cause of the P0340 code is a faulty camshaft position sensor. Start by locating the sensor and checking for any visible damages, dirt, or corrosion. If the sensor appears damaged, replace it with a new one.

Check Wiring and Connectors

Damaged or corroded wiring and connectors can also trigger the P0340 code. Inspect the wiring leading to the camshaft position sensor, and ensure all connections are secure and clean. Repair or replace any damaged wires or connectors as needed.

Examine the Timing Chain or Belt

Timing chain or belt issues can lead to the P0340 code in your Dodge Ram 1500. Inspect the timing chain or belt for wear, damage, or misalignment and make any necessary adjustments or replacements.

Evaluate the Camshaft and Crankshaft

Mechanical problems with the camshaft or crankshaft can cause the P0340 code. Inspect these components for damage or any signs of failure, and consult a professional mechanic if necessary for further diagnosis or repair.

Assess the Powertrain Control Module (PCM)

In rare cases, the issue could lie within the PCM. If all previous steps have not resolved the P0340 code, consult a professional mechanic to diagnose and repair the PCM.

Following these steps can effectively address the P0340 code in your Dodge Ram 1500. Always take the time to accurately diagnose the cause and consult a professional mechanic if you’re unsure or uncomfortable with any part of the repair process.

Other Relevant Information

When dealing with the Dodge Ram 1500 P0340 code, it is important to understand the various components and factors that may contribute to this issue. The P0340 code indicates a problem with the camshaft position sensor circuit, which can negatively impact your vehicle’s performance and fuel efficiency.

The camshaft position sensor (CMP) is responsible for determining the rotational speed and position of the intake camshaft in your Dodge Ram 1500. This information is crucial for the powertrain control module (PCM) as it synchronizes the fuel injection timing with the ignition system. If the P0340 code is set, the ignition spark and fuel injector timing may fail since the engine will not know when to fire these components.

It is also worth mentioning that the crankshaft position sensor plays a role in this process as well. If the CMP sensor fails, the PCM can still use the crankshaft position sensor to determine the engine position and initiate startup. However, it is ideal for both sensors to be functioning properly for optimal performance.

Furthermore, the P0340 code can be caused by various factors such as faulty wiring, corroded connections, or issues with the PCM. Here’s a list of common causes:

  • Defective CMP sensor
  • Damaged wiring or connectors
  • Timing chain misalignment
  • Issues with the PCM

To locate the CMP sensor in your Dodge Ram 1500, it is usually mounted to the back of the cylinder head closest to the intake camshaft on most Dodge/Chrysler OHC engines. On OHV and cam-in-block engines, the sensor is attached to the front of the engine closest to the camshaft itself.

While addressing the P0340 code, they might also check for any damaged wiring or corroded contacts, and ensure that your vehicle is functioning seamlessly. Keep in mind that OBD-II codes like P0340 are manufacturer-specific, meaning that their severity, solutions, and diagnoses may vary by make and model.


Taking care of your Dodge Ram 1500 is essential. If your vehicle displays a P0340 code, it signals a problem with the camshaft position sensor circuit. Remember, addressing this issue early can prevent any negative impact on performance and fuel efficiency. Diagnosing the P0340 code may cost between $75 and $150 per hour, depending on your location and other factors. Keep your truck running smoothly by addressing this issue professionally and promptly.

  • Eric Williams

    I'm the founder of Daily Car Tips. I wrote articles in the automotive industry for more than 10 years, published in USA and Europe. I love sharing my knowledge and insights with fellow enthusiasts. Join me on this journey as we explore the exciting world of cars together!

    View all posts

Related Posts