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Engine-Codes – Generic – P1381

P1381 Code - Cylinder Position Sensor Intermittent Interruption

Quick Answer

The P1381 code indicates an intermittent interruption in the cylinder position sensor, also known as the crankshaft position sensor. Common causes include Faulty cylinder position sensor, Damaged wiring or connectors related to the sensor, Malfunctioning ECM. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P1381 indicates Cylinder Position Sensor Intermittent Interruption.
Common causes
Common causes include Faulty cylinder position sensor, Damaged wiring or connectors related to the sensor, Malfunctioning ECM.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code P1381 Description

The P1381 code indicates an intermittent interruption in the cylinder position sensor, also known as the crankshaft position sensor. This sensor plays a crucial role in the engine's operation by providing the engine control module (ECM) with information on the position of the crankshaft. The ECM uses this information to determine the ignition timing and fuel injection timing. When the cylinder position sensor experiences intermittent interruptions, it can lead to misfires, rough idling, poor acceleration, and even stalling of the engine.

OBDII Code P1381 - Cylinder Position Sensor Intermittent Interruption
P1381 Code - Cylinder Position Sensor Intermittent Interruption

Common Causes of P1381

  1. Faulty cylinder position sensor
  2. Damaged wiring or connectors related to the sensor
  3. Malfunctioning ECM
  4. Timing belt or chain issues
  5. Engine overheating causing sensor damage

Symptoms of P1381

  1. Engine misfires or rough idling
  2. Poor acceleration or hesitation during acceleration
  3. Engine stalling or difficulty starting
  4. Decreased fuel efficiency
  5. Check Engine Light illuminated on the dashboard

How to Fix P1381

  1. Diagnose the issue by connecting a scan tool to retrieve the trouble code and check the sensor's operation.
  2. Inspect the wiring and connectors for any damage or corrosion, repairing or replacing as needed.
  3. Test the cylinder position sensor's resistance and output voltage to verify if it is functioning correctly.
  4. Replace the faulty cylinder position sensor if it fails the tests, ensuring proper installation and calibration.
  5. Clear the trouble code from the ECM's memory and perform a test drive to confirm that the issue has been resolved.

Cost to Fix P1381

The typical repair costs for addressing a P1381 code can range from $150 to $400, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops may vary based on factors such as location, vehicle make and model, and engine type. It's advisable to inquire about local rates for a more accurate estimate before proceeding with the repair. Keep in mind that rates at dealerships or in metropolitan areas may be higher, while independent shops often offer more competitive pricing.

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Code P1381 Information for Specific Makes

  • P1381 Acura — Cylinder Position Sensor Intermittent Interruption
  • P1381 Buick — Misfire Detected - No Communication with Brake Control Module
  • P1381 Cadillac — Misfire Detected - No Communication with Brake Control Module
  • P1381 Chevrolet — Misfire Detected - No Communication with Brake Control Module
  • P1381 Dodge — Crank Position System Variation Not Learned
  • P1381 Ford — Variable Cam Timing Over Advance Bank 1
  • P1381 Geo — Misfire Detected - No Communication with Brake Control Module
  • P1381 GMC — Misfire Detected - No Communication with Brake Control Module
  • P1381 Honda — Cylinder Position Sensor Intermittent Interruption
  • P1381 Isuzu — Cylinder Position Sensor Intermittent Interruption
  • P1381 Jaguar — Variable Cam Timing Over Advance Bank 1
  • P1381 Lincoln — Variable Cam Timing Over Advance Bank 1
  • P1381 Mazda — Camshaft Position Timing Over Advanced Bank 1
  • P1381 Mercury — Variable Cam Timing Over Advance Bank 1
  • P1381 Pontiac — Misfire Detected - No Communication with Brake Control Module
  • P1381 Saturn — Misfire Detected - No Communication with Brake Control Module
About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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