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P1320 Acura Code - Super Knock

Quick Answer

The P1320 code, commonly referred to as Super Knock, is a Diagnostic Trouble Code (DTC) specific to Honda vehicles. Common causes include Incorrect Ignition Timing: Misaligned ignition timing can lead to premature combustion, causing knocking, Low-Quality Fuel: Using fuel with an octane rating lower than recommended can increase the likelihood of knocking, Carbon Buildup: Accumulation of carbon deposits in the combustion chamber can alter the combustion process, leading to knocking. 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
P1320 Acura indicates Super Knock.
Common causes
Common causes include Incorrect Ignition Timing: Misaligned ignition timing can lead to premature combustion, causing knocking, Low-Quality Fuel: Using fuel with an octane rating lower than recommended can increase the likelihood of knocking, Carbon Buildup: Accumulation of carbon deposits in the combustion chamber can alter the combustion process, leading to knocking.
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 02, 2025
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Code P1320 Acura Description

The P1320 code, commonly referred to as Super Knock, is a Diagnostic Trouble Code (DTC) specific to Honda vehicles. This code indicates that the Powertrain Control Module (PCM) has detected excessive engine knock or pinging, which can be detrimental to engine performance and longevity. Engine knock occurs when fuel combusts prematurely in the combustion chamber, leading to a knocking or pinging sound. This phenomenon can severely affect the vehicle's performance, as it may cause the engine to run inefficiently, leading to reduced power output, poor fuel economy, and increased emissions.
OBDII Code P1320 Acura - Super Knock
P1320 Acura Code - Super Knock

Common Causes of P1320 Acura

  1. Incorrect Ignition Timing: Misaligned ignition timing can lead to premature combustion, causing knocking.
  2. Low-Quality Fuel: Using fuel with an octane rating lower than recommended can increase the likelihood of knocking.
  3. Carbon Buildup: Accumulation of carbon deposits in the combustion chamber can alter the combustion process, leading to knocking.
  4. Faulty Knock Sensor: A malfunctioning knock sensor may provide inaccurate readings to the PCM, triggering the code.
  5. Worn Engine Components: Deterioration of components such as pistons, rings, or bearings can contribute to abnormal engine noises and knocking.

Symptoms of P1320 Acura

  1. Engine Knock or Pinging: A distinct knocking or pinging sound coming from the engine, especially during acceleration or under load.
  2. Reduced Engine Performance: Noticeable decrease in power output, making the vehicle feel sluggish or unresponsive.
  3. Poor Fuel Economy: Increased fuel consumption due to inefficient combustion processes.
  4. Check Engine Light: The illumination of the check engine light on the dashboard, indicating a fault detected by the PCM.
  5. Vibration or Rough Idling: The engine may exhibit vibrations or a rough idle, especially at low RPMs.

How to Fix P1320 Acura

  1. Diagnostic Scan: Begin with a comprehensive diagnostic scan to confirm the P1320 code and check for any additional codes that may provide further insight into the issue.
  2. Inspect and Replace Knock Sensor: If the knock sensor is found to be faulty, it should be replaced to ensure accurate monitoring of engine vibrations.
  3. Check Ignition Timing: Verify the ignition timing settings and adjust them as necessary to align with manufacturer specifications.
  4. Fuel Quality Assessment: Evaluate the fuel being used; switch to a higher octane fuel if necessary to prevent knocking.
  5. Carbon Cleaning: Perform a carbon cleaning service to remove deposits from the combustion chamber, which can help restore proper engine function.

Cost to Fix P1320 Acura

The cost to diagnose and repair the P1320 code can vary significantly based on several factors, including the specific vehicle make and model, engine type, and local labor rates. On average, the total repair costs can range from $150 to $600. This estimate includes parts such as a new knock sensor (which can cost between $50 to $150) and labor charges, which typically range from $80 to $150 per hour. In metropolitan areas or at dealerships, labor rates may be higher, while independent shops may offer more competitive pricing. It's advisable to consult local repair shops for a more precise estimate tailored to your vehicle's needs.

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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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