Replaced Camshaft Position Sensor

Replaced Camshaft Position Sensor But Still Get Code? How to Fix It?

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If you’ve encountered an issue with your camshaft position sensor and replaced it, you might expect the problem to be resolved. However, it can be frustrating to find that the error code still lingers on your dashboard even after the sensor replacement.

Commonly, two error codes, P0340 and P0011, tend to persist after changing the camshaft position sensor. In this article, we will delve into the reasons why these error codes continue to haunt you and explore potential solutions to eliminate them once and for all.

Understanding the Error Codes Linked to Camshaft Position Sensor Problems

After replacing the camshaft position sensor, you may encounter various error codes, each indicating a distinct issue. Below is a list of error codes you might come across:

P0340

P0340 signifies a problem with your vehicle’s Camshaft Position Sensor A circuit. This error code suggests that the signal from the camshaft position sensor to the PCM (Powertrain Control Module) is disrupted, causing the issue.

P0343

This code refers to the problem with “Camshaft Position Sensor ‘A’ Circuit High Bank 1 or Single Sensor.” It indicates that the PCM has detected an issue with the sensor signal.

P0345

When you see P0345, it means that the bank two camshaft position sensor is sending an incorrect voltage reading, leading to an error in the system.

P0011

The P0011 code indicates that the ECM/PCM of your vehicle cannot distinguish between the desired and actual camshaft position angle. As a result, it fails to reach its programmed target, which is necessary for proper camshaft position sensor functioning.

Decoding the P0340 Error Code

Among all the error codes associated with camshaft position sensors, P0340 is a common occurrence after sensor replacement.

To understand this code better, it’s essential to recognize that the camshaft sensor plays a crucial role in recording the speed and position of the camshaft during rotation. Additionally, it synchronizes the ignition and firing of the ignition coils.

Various modules within the vehicle utilize data from the camshaft sensor. The Engine Control Module (ECM) and the Powertrain Control Module (PCM) are two primary users of this sensor.

When the data received from the sensor becomes unreliable or inconsistent, it disrupts the injection and ignition spark timing set by the PCM. This inconsistency triggers the activation or storage of the P0340 error code. Consequently, P0340 is one of the most frequently encountered error codes when dealing with a faulty camshaft position sensor.

Another error code closely related to P0340 is P0345. Both codes serve as warnings that there is an issue with the electric circuit of the sensor. However, they differ in their specifics:

  • P0345 arises when there is an incorrect voltage reading.
  • P0340 emerges when there are problems with the control of the intake and exhaust valves, affecting the timing and performance of your vehicle’s engine.

In summary, resolving persistent error codes, especially P0340, after replacing the camshaft position sensor requires a detailed diagnosis of the sensor’s electric circuit, as well as the ignition and injection systems it affects. By addressing these issues, you can ensure that your vehicle operates smoothly and error-free.

Resolving Persistent Error Codes After Camshaft Position Sensor Replacement

You’ve replaced your camshaft position sensor, yet those pesky error codes, specifically P0340 and P0011, continue to haunt you. Let’s delve into the common reasons why these error codes persist and explore effective solutions.

Why Do Error Codes Linger After Replacing the Camshaft Position Sensor?

  1. Incomplete Relearn or Recalibration Process: Sometimes, the error codes remain because the relearn or recalibration process hasn’t been completed. The ECU may still be holding onto old sensor data, causing it to trigger the code.
  2. ECU Remembers the Old Sensor: Your vehicle’s ECU may still be coded with information from the previous camshaft position sensor, leading to code retention.
  3. Poor Installation or Defective Sensor: Incorrect installation or a defective new camshaft position sensor can trigger error codes. Ensure proper installation to avoid this issue.
  4. Old O-Ring Not Removed: When replacing the sensor, it’s essential to remove the old O-ring from the camshaft sensor. Failure to do so can hinder proper installation and create a gap, leading to issues.
  5. Electric Circuit or Wiring Problems: If the error codes persist, it often indicates a problem with the wiring or electric circuit responsible for sending signals to the ECU.
  6. Damaged or Malfunctioning Reluctor Wheel: The reluctor wheel, which the camshaft position sensor interacts with, may be damaged or not functioning correctly.
  7. Timing Chain and Guide Plate Wear: While debated among mechanics, some believe that wear and stretch on the timing chain and guide plates could contribute to error codes.
  8. Faulty Starter Motor: A faulty starter motor can disrupt the signal transfer from the camshaft position sensor to the ECU, triggering the P0340 error code.
  9. Issues with the PCM (Powertrain Control Module): Sometimes, a faulty PCM can cause the error code to persist. The PCM plays a crucial role in processing data from the sensor.

How to Eliminate the Error Codes: 7 Steps to Follow

If you’re still encountering error codes after replacing the camshaft position sensor, follow these steps to diagnose and resolve the issue:

1. Relearn or Recalibrate the Sensor:

  • Turn on the vehicle and connect an OBD2 scanner tool.
  • Select your vehicle brand and model or use the Auto Detect option.
  • Access the “Special Function” menu and find the Cam Crank Relearn option.
  • Follow the on-screen instructions to complete the relearn process.

2. Check the O-Rings:

  • Ensure that you use the O-ring provided with the new camshaft position sensor.
  • Remove any old O-rings from the sensor.
  • Clean the O-ring before installation.

3. Test and Repair Camshaft Position Sensor Wiring:

  • Analyze the wiring diagram to identify the power supply, sensor signal, and sensor ground wires.
  • Use a multimeter to test the power supply voltage (around 5 amps) and check the continuity of the ground and signal circuits.
  • Repair or replace any faulty wiring.

4. Inspect the Reluctor Wheel:

  • Ensure proper alignment of the camshaft position sensor with the reluctor wheel teeth.
  • Examine the reluctor wheel for any damaged teeth.

5. Inspect the Timing Chain:

  • If error codes persist, consider inspecting the timing chain for wear and damage.
  • Replace the timing chain if necessary.

6. Check the Starter Motor:

  • Examine the starter motor for malfunctions that may affect signal transfer.
  • Repair or replace the starter motor if needed.

7. Inspect the ECU:

  • Check whether the ECU is properly receiving and distributing signals from the camshaft position sensor.
  • Repair or replace the ECU if it fails to function correctly.

Note: Error codes may persist temporarily even after resolving the issue due to the vehicle’s computer system. It may require a few trips to confirm that the problem is resolved before the error codes disappear.

By following these steps and conducting a thorough inspection, you can effectively address the error codes and ensure your vehicle operates smoothly without any lingering issues.

FAQs

Here are some common questions regarding camshaft position sensor replacement and related issues:

1. Can You Replace a Camshaft Position Sensor Yourself?

  • Yes, replacing a camshaft position sensor is a task that can be undertaken by anyone with basic technical knowledge. The process typically takes less than 10 minutes, making it a cost-effective choice as it saves approximately $100 in labor costs.

2. What Should You Do After Replacing the Camshaft Sensor?

  • After replacing the camshaft position sensor, it’s crucial to take the following steps:
    • Cancel error codes from the engine controller using a diagnostic scanner.
    • Relearn the camshaft position sensor to ensure proper functionality.

3. How Much Does It Cost to Replace the Camshaft Position Sensor?

  • The cost of replacing the camshaft position sensor can vary depending on the vehicle brand, model, and your location. Generally, the parts alone cost between $95 and $200. If you opt for professional installation, expect to pay approximately $70 to $100 in labor charges.

4. Can I Drive With a Camshaft Position Sensor Problem?

  • While it’s possible to drive your vehicle with a malfunctioning camshaft position sensor, doing so may negatively affect your engine’s performance and fuel consumption. Additionally, you might experience issues such as misfires, power loss, jerking, or other engine-related problems.

5. How Long Do Camshaft Position Sensors Last?

  • Camshaft position sensors are designed to last as long as the vehicle itself. However, in practice, they often need replacement before reaching their expected lifespan. This is primarily because camshaft position sensors are subjected to significant heat and wear due to the engine’s operation.

Conclusion

Replacing a camshaft position sensor is a manageable task, but the challenge arises when error codes persist even after the sensor replacement. There can be various underlying reasons for this issue, and it’s essential to thoroughly inspect and address them.

This guide aims to help you understand the reasons behind persistent error codes and provides potential solutions to eliminate them. By following the recommended steps and addressing the root causes, you can ensure your vehicle operates smoothly and error-free.

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