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Engine-Codes – Generic – P1371

P1371 Code - Missing Low Resolution Signal

Quick Answer

The diagnostic trouble code P1371 indicates a problem with the low-resolution signal from the crankshaft position sensor. Common causes include Faulty crankshaft position sensor, Damaged wiring or connectors, Electromagnetic interference. 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
P1371 indicates Missing Low Resolution Signal.
Common causes
Common causes include Faulty crankshaft position sensor, Damaged wiring or connectors, Electromagnetic interference.
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 P1371 Description

The diagnostic trouble code P1371 indicates a problem with the low-resolution signal from the crankshaft position sensor. The crankshaft position sensor is responsible for monitoring the position and speed of the crankshaft, which is crucial for the engine control unit (ECU) to determine the ignition timing and fuel delivery. When the ECU receives a weak or missing signal from the crankshaft position sensor, it can lead to a variety of issues that can affect the vehicle's performance and drivability.

OBDII Code P1371 - Missing Low Resolution Signal
P1371 Code - Missing Low Resolution Signal

Common Causes of P1371

  1. Faulty crankshaft position sensor
  2. Damaged wiring or connectors
  3. Electromagnetic interference
  4. Malfunctioning ECU

Symptoms of P1371

  1. Engine misfires
  2. Rough idling or stalling
  3. Poor acceleration
  4. Difficulty starting the engine

How to Fix P1371

  1. Perform a diagnostic scan to confirm the presence of the P1371 code.
  2. Inspect the crankshaft position sensor, wiring, and connectors for any damage or loose connections.
  3. Test the sensor's output signal using a multimeter to ensure it is within specifications.
  4. Replace the crankshaft position sensor if it is found to be faulty.
  5. Clear the trouble code from the ECU and test the vehicle to ensure the issue has been resolved.

Cost to Fix P1371

The cost of repairing a missing low-resolution signal related to the P1371 code can vary depending on the specific cause of the issue and the vehicle's make and model. On average, the cost of replacing a faulty crankshaft position sensor can range from $100 to $300, including parts and labor. Additional costs may be incurred if there are wiring or connector issues that need to be addressed. It is advisable to consult with a qualified mechanic or auto repair shop for a more accurate estimate based on the specific circumstances of the vehicle.

When is the Code Detected?

The Powertrain Control Module (PCM) detects a predetermined amount of high resolution pulses before detecting any low resolution pulses.

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Code P1371 Information for Specific Makes

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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