DTC P0372 Timing Reference High Resolution Signal A Too Few Pulses

Welcome to this informative blog post dedicated to troubleshooting On-Board Diagnostic Trouble Code P0372: Timing Reference High Resolution Signal A Too Few Pulses. Whether you’re a seasoned automotive enthusiast or a curious car owner, this guide is here to equip you with the knowledge and practical guidance needed to tackle this issue effectively. In the following sections, we’ll explore the meaning of DTC P0372, identify its symptoms, uncover potential causes, discuss diagnosis methods, and provide effective solutions to fix the problem.

1. What does P0372 code mean?

Let’s begin by deciphering the meaning of DTC P0372. In the world of automotive diagnostics, “P0372” is a standardized code used by your vehicle’s onboard computer (OBD-II system) to communicate a specific issue. The “P” indicates that it’s a Powertrain-related problem, typically associated with the engine or transmission. The “0372” is the unique trouble code indicating a Timing Reference High Resolution Signal A Too Few Pulses.

In simpler terms, this trouble code serves as a warning sign that there’s an insufficient number of pulses detected in the Timing Reference High Resolution Signal A. This signal is crucial for synchronizing various engine components and maintaining precise timing for optimal performance.

2. What are the causes of DTC P0372?

Now, let’s explore the potential causes behind DTC P0372:

  • Faulty Timing Reference Sensor: The sensor responsible for generating the Timing Reference High Resolution Signal A may be malfunctioning or damaged.
  • Wiring or Connector Issues: Damaged, corroded, or loose wiring and connectors in the sensor circuit can disrupt the signal.
  • Sensor Alignment Problems: Incorrect sensor installation or improper alignment can lead to signal malfunctions.
  • Power Supply Problems: Issues with the power supply to the sensor circuit can result in signal disruptions.
  • Engine Mechanical Issues: Occasionally, engine mechanical problems can indirectly affect the sensor’s performance.

3. What are the symptoms of DTC P0372?

Recognizing the symptoms associated with this trouble code is crucial for diagnosis. Common signs of DTC P0372 may include:

  • Check Engine Light (CEL): The most noticeable indicator is the illumination of the check engine light on your dashboard.
  • Engine Performance Issues: You may experience engine misfires, poor acceleration, or reduced overall performance due to timing discrepancies.
  • Occasional Difficulty Starting: Your vehicle may occasionally have trouble starting, or it might not start at all due to timing-related issues.
  • Intermittent Stalling: The engine may intermittently stall while driving or idling due to timing reference signal malfunctions.

4. How to diagnose DTC P0372?

Diagnosing DTC P0372 requires a systematic approach. Here’s a step-by-step guide:

  • Scan the Code: Utilize an OBD-II scanner to retrieve the trouble code and confirm the issue.
  • Inspect Wiring and Connectors: Thoroughly examine the wiring and connectors related to the timing reference sensor circuit for damage, corrosion, or loose connections.
  • Check Sensor Alignment: Ensure that the sensor is correctly installed and aligned to provide a consistent signal.
  • Test the Sensor: Assess the sensor’s performance using a digital multimeter during malfunction episodes. If your initial inspection and basic multimeter testing don’t reveal the cause of DTC P0372, 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 P0372 problem?

Now, let’s explore effective strategies for fixing DTC P0372:

  1. Replace the Timing Reference Sensor: If the sensor is malfunctioning or damaged, replace it with a high-quality replacement.
  2. Repair or Replace Wiring and Connectors: Address damaged wiring or connectors that intermittently cause the issue by repairing or replacing them as necessary.
  3. Ensure Proper Alignment: Reinstall the sensor, making sure it’s correctly aligned with the timing reference point.
  4. Check Power Supply: Verify that the power supply to the sensor circuit is stable and within the specified range during malfunction episodes.
  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 P0372, indicating a Timing Reference High Resolution Signal A Too Few Pulses, can present challenges, but with the knowledge and guidance provided in this guide, you’re well-equipped to diagnose and address the issue effectively. Always prioritize safety, and if you’re uncertain, seek professional assistance. Happy troubleshooting on your automotive journey!