DTC P0342 Camshaft Position Sensor Circuit Low Input

Welcome to another informative blog post dedicated to troubleshooting On-Board Diagnostic Trouble Codes. In this article, we’ll dive into the world of On-Board Diagnostic Trouble Code P0342, which signifies a Camshaft Position Sensor Circuit Low Input problem. By the end of this comprehensive guide, you’ll understand the significance of this code, be able to identify its symptoms, comprehend its potential causes, learn how to diagnose the issue, and, most importantly, discover effective strategies for fixing it.

1. What does P0342 code mean?

Let’s begin by decoding the meaning of DTC P0342. In the realm of automotive diagnostics, “P0342” serves as a universal code used by your vehicle’s onboard computer (OBD-II system) to communicate a specific issue. The “P” designates it as a Powertrain-related problem, typically linked to the engine or transmission. The “0342” is the unique trouble code indicating a Camshaft Position Sensor Circuit Low Input problem.

In simpler terms, this trouble code is a warning sign that there’s a problem with the camshaft position sensor circuit, and it’s reading a lower-than-expected input signal. The camshaft position sensor plays a critical role in synchronizing the engine’s operation by providing information about the camshaft’s position and timing.

2. What are the causes of DTC P0342?

Now, let’s explore the potential causes behind DTC P0342:

  • Faulty Camshaft Position Sensor: The sensor itself may be malfunctioning, resulting in a weak or incorrect signal.
  • Wiring or Connector Issues: Damaged, corroded, or loose wiring and connectors can disrupt the signal between the sensor and the vehicle’s computer.
  • Sensor Alignment: Incorrect sensor installation or improper alignment with the camshaft can lead to a low input reading.
  • Power Supply Problems: Issues with the power supply to the sensor circuit can result in a weak signal.
  • Engine Mechanical Issues: Sometimes, engine mechanical problems can indirectly affect the camshaft sensor’s performance.

3. What are the symptoms of DTC P0342?

Identifying the symptoms associated with this trouble code is essential for diagnosis. Common signs of DTC P0342 may include:

  • Check Engine Light (CEL): The most noticeable indicator is the illumination of the check engine light on your dashboard.
  • Engine Performance Issues: Reduced power, rough idling, and poor overall engine performance can be observed.
  • Difficulty Starting: Your vehicle may have trouble starting, or it might not start at all.
  • Stalling: The engine may stall while driving or idling due to inaccurate sensor readings.

4. How to diagnose DTC P0342?

Diagnosing DTC P0342 requires a systematic approach. Here’s a step-by-step guide:

  • Scan the Code: Use an OBD-II scanner to retrieve the trouble code and confirm the issue.
  • Inspect Wiring and Connectors: Carefully examine the wiring and connectors related to the camshaft position sensor for damage, corrosion, or loose connections.
  • Check Sensor Alignment: Ensure that the sensor is correctly installed and aligned with the camshaft.
  • Test the Sensor: To assess the sensor’s performance, use a digital multimeter or an oscilloscope to measure the input signal. if your initial inspection and basic multimeter testing don’t reveal the cause of DTC P0338, specialized diagnostic equipment like an oscilloscope or advanced scan tool with live data capabilities can provide more in-depth insights into the sensor’s performance. This advanced testing allows you to detect subtle issues or intermittent faults that might not be evident through simpler diagnostic methods, helping you diagnose and resolve the problem more accurately

5. How to fix DTC P0342 problem?

Now, let’s delve into effective solutions for fixing DTC P0342:

  1. Replace the Camshaft Position Sensor: If the sensor is faulty or providing a low input signal, replace it with a high-quality replacement.
  2. Repair or Replace Wiring and Connectors: If you find damaged wiring or connectors, repair or replace them as necessary.
  3. Ensure Proper Alignment: Reinstall the sensor, ensuring it’s correctly aligned with the camshaft.
  4. Check Power Supply: Verify that the power supply to the sensor circuit is stable and within the specified range.
  5. Clear the Trouble Code: After completing the repairs, use your OBD-II scanner to clear the trouble code.
  6. Test Drive: Take your vehicle for a test drive to ensure that the issue has been successfully addressed and that the check engine light remains off.


In conclusion, DTC P0342, indicating a Camshaft Position Sensor Circuit Low Input problem, can be a challenging issue to tackle. However, with the knowledge and guidance provided in this guide, you’re well-equipped to diagnose and resolve the problem effectively. Always prioritize safety, and if you’re uncertain, seek professional assistance. Happy troubleshooting, fellow automotive enthusiasts!