DTC P0386 Crankshaft Position Sensor B Circuit Range/Performance

In the realm of automotive diagnostics, On-Board Diagnostic Trouble Codes (DTCs) provide valuable insights into the health of your vehicle. In this informative blog post, we will unravel the intricacies of DTC P0386, specifically focusing on the Crankshaft Position Sensor B Circuit Range/Performance issue. Whether you’re an automotive enthusiast or a professional mechanic, this guide will equip you with the knowledge and steps to troubleshoot and resolve this challenging code. Let’s embark on this diagnostic journey.

1. Understanding P0386: What does the code mean?

DTC P0386 is a diagnostic trouble code that indicates a potential range or performance problem within the Crankshaft Position Sensor B Circuit. The Crankshaft Position Sensor, a critical component of the engine management system, tracks the position and rotational speed of the crankshaft. When it detects deviations outside the expected range, the Engine Control Module (ECM) triggers the P0386 code, signifying an issue with the sensor’s circuit or performance.

2. The Multifaceted Causes of P0386: What’s behind it?

To effectively diagnose and resolve DTC P0386, it’s vital to grasp the various potential causes, which may include:

  • A malfunctioning or damaged crankshaft position sensor.
  • Wiring issues, such as shorts, breaks, or corroded connections in the sensor’s circuit.
  • Poor electrical connections or connector corrosion.
  • Rarely, problems with the ECM. Identifying the root cause is the initial stride toward rectifying this code.

3. Symptoms of P0386: What to look out for?

Recognizing the symptoms associated with DTC P0386 is key to early detection. Common signs of this issue encompass:

  • Engine misfires or hesitation during acceleration.
  • Difficulty starting the engine, especially in cold conditions.
  • An illuminated check engine light (CEL) on the dashboard.
  • Reduced engine performance and power. If you encounter any of these symptoms, addressing the issue promptly is vital to prevent further engine complications.

4. Diagnosing DTC P0386: A systematic approach

Accurate diagnosis of DTC P0386 necessitates a systematic approach. Here’s a step-by-step guide to help you pinpoint the issue:

5. Resolving P0386: How to fix the problem?

Once you’ve identified the issue causing DTC P0386, it’s time to address it effectively. Consider these steps:

  • Replace the crankshaft position sensor if it is determined to be faulty or damaged.
  • Repair or replace any damaged wiring or connectors in the Crankshaft Position Sensor B Circuit.
  • Ensure proper electrical connections and clean any corroded connectors.
  • Clear the trouble code using your OBD-II scanner after completing the necessary repairs. Clearing the code is crucial to reset the check engine light and confirm that the problem has been successfully resolved.


In this comprehensive guide, we’ve navigated through DTC P0386, the Crankshaft Position Sensor B Circuit Range/Performance code. Understanding its meaning, potential causes, symptoms, systematic diagnosis, and the importance of clearing the trouble code empowers you to confidently address this issue. Whether you’re a dedicated automotive enthusiast or a skilled mechanic, resolving these challenges with precision not only restores your vehicle’s performance but also elevates your automotive knowledge. Wishing you smooth and trouble-free journeys!