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Engine-Codes – Generic – P1324

P1324 Code - Knock Sensor Power Source Circuit Low Voltage

Quick Answer

The P1324 diagnostic trouble code (DTC) indicates that there is a low voltage condition in the knock sensor power source circuit. Common causes include Damaged wiring or connectors in the knock sensor circuit, Faulty knock sensor, Corrosion or poor connections in the wiring harness. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means
P1324 indicates Knock Sensor Power Source Circuit Low Voltage.
Common causes
Common causes include Damaged wiring or connectors in the knock sensor circuit, Faulty knock sensor, Corrosion or poor connections in the wiring harness.
Severity
Moderate - service should be scheduled soon.
Can I drive?
The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code P1324 Description

The P1324 diagnostic trouble code (DTC) indicates that there is a low voltage condition in the knock sensor power source circuit. Knock sensors are crucial components in modern vehicles as they detect abnormal combustion in the engine, also known as engine knock or detonation. When the knock sensor detects these vibrations, it sends a signal to the engine control module (ECM) to adjust the ignition timing to prevent engine damage.

OBDII Code P1324 - Knock Sensor Power Source Circuit Low Voltage
P1324 Code - Knock Sensor Power Source Circuit Low Voltage

Common Causes of P1324

  1. Damaged wiring or connectors in the knock sensor circuit
  2. Faulty knock sensor
  3. Corrosion or poor connections in the wiring harness
  4. ECM malfunction
  5. Electrical issues such as a blown fuse or short circuit

Symptoms of P1324

  1. Engine knocking or pinging noises
  2. Decreased engine performance
  3. Poor fuel efficiency
  4. Illuminated check engine light
  5. Rough idling or stalling

How to Fix P1324

  1. Diagnose the issue: Use a scan tool to read the code and perform a visual inspection of the knock sensor circuit components.
  2. Check wiring and connectors: Inspect the wiring harness and connectors for any damage, corrosion, or poor connections. Repair or replace as needed.
  3. Test the knock sensor: Test the knock sensor using a multimeter to ensure it is functioning correctly. Replace if faulty.
  4. Check ECM: Inspect the ECM for any signs of damage or malfunction. Repair or replace if necessary.
  5. Clear the code: After completing repairs, clear the code using a scan tool and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1324

The cost of repairing a knock sensor power source circuit low voltage issue can vary depending on the specific cause of the problem. In general, replacing a knock sensor can cost between $100 and $300, while addressing wiring or connector issues may range from $50 to $200. If the ECM needs to be replaced, this can add several hundred dollars to the repair cost. Labor rates at auto repair shops can range from $80 to $150 per hour, so the total cost including parts and labor may be in the range of $200 to $800 or more. It's recommended to get a detailed estimate from a qualified mechanic to determine the exact cost for your vehicle.

What does this mean?

Tech Notes for P1324

The P1324 code means that the Knock Sensor is not working properly. Problems with the knock sensor will not cause an engine performance problems. Replacing the knock sensor usually takes care of the problem.

When is the Code Detected?

When an excessively low voltage from the sensor is sent to Engine Control Module (ECM)

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Code P1324 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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