P0380 Timing Reference High Resolution Signal B No Pulses

Have you ever experienced a sudden loss of power in your engine or a decrease in fuel efficiency? If so, you may be familiar with the dreaded P0380 code.

This code is often accompanied by a warning light on your dashboard, indicating that there is an issue with the timing reference high resolution signal B and the lack of pulses occurring within it. But what does this mean, and what can be done to fix it?

Let’s dive into the details of P0380 and explore the solutions to this common issue.

What is P0380?

P0380 is a diagnostic trouble code that indicates a malfunction in the high resolution signal B circuit of the engine’s timing system. This code is often triggered when there is a lack of pulses occurring within the circuit, causing the engine to lose timing reference and resulting in a decrease in performance and fuel efficiency.

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What causes P0380?

There are a number of potential causes for the P0380 code, ranging from mechanical issues to electrical faults. Some common causes of this code include:

  • Faulty camshaft or crankshaft sensors
  • Wiring issues within the timing circuit
  • Malfunctioning timing belt or chain
  • Failed engine control module (ECM)
  • Broken or damaged timing components

How can P0380 be diagnosed?

Diagnosing the cause of P0380 can be a challenging task, as there are multiple potential causes for the code.

However, a skilled mechanic can use a variety of diagnostic tools and techniques to pinpoint the root cause of the issue. Some common diagnostic steps include:

  • Using an OBD-II scanner to read the code and check for any related codes
  • Checking the timing components for wear or damage
  • Testing the camshaft and crankshaft sensors for proper operation
  • Inspecting the wiring and connections within the timing circuit
  • Checking for proper voltage and ground within the circuit

Once the cause of P0380 has been identified, the mechanic can begin to make the necessary repairs to restore proper engine function.

How can P0380 be fixed?

The solution to P0380 will depend on the underlying cause of the issue. Some potential fixes include:

  • Replacing faulty camshaft or crankshaft sensors
  • Repairing or replacing damaged timing components
  • Ensuring proper voltage and ground within the timing circuit
  • Replacing a failed engine control module
  • Repairing any damaged wiring or connections within the circuit

It is important to address P0380 as soon as possible to prevent further damage to the engine and ensure optimal performance and fuel efficiency.

In conclusion, P0380 can be a frustrating issue for any vehicle owner to experience. However, by understanding the causes and diagnostic procedures associated with this code, it is possible to effectively address the issue and restore proper engine function. If you are experiencing the symptoms of P0380, don’t hesitate to seek the assistance of a qualified mechanic to diagnose and repair the issue.


Q: Can I continue to drive my vehicle with the P0380 code?
A: While it is possible to drive with the P0380 code, doing so can lead to decreased performance and potential damage to the engine. It is best to have the issue addressed as soon as possible.

Q: Can I diagnose and repair P0380 myself?
A: Unless you have experience with automotive diagnostics and repair, it is best to leave P0380 to a qualified mechanic. Attempting to diagnose and repair the issue yourself can lead to further damage to the engine and potentially even injury.

Q: How much does it cost to fix P0380?
A: The cost of fixing P0380 will depend on the underlying cause of the issue and the extent of the necessary repairs. It is best to consult with a mechanic for an accurate estimate.

Q: Can P0380 cause damage to other engine components?
A: Yes, if left unaddressed, P0380 can lead to damage to other engine components, including the camshaft and crankshaft.

Q: Is P0380 a common issue?
A: Yes, P0380 is a relatively common issue that can occur in a variety of vehicle models and makes. However, proper maintenance and timely repairs can help prevent this issue from occurring.