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Engine-Codes – Generic – P1332

P1332 Code - Knock Sensor 4 Low Input

Quick Answer

The diagnostic trouble code P1332 indicates that there is a low input signal from Knock Sensor 4 in the vehicle's engine control module (ECM) or powertrain control module (PCM). Common causes include Faulty knock sensor, Damaged wiring or connectors related to Knock Sensor 4, Issues with the ECM/PCM. 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
P1332 indicates Knock Sensor 4 Low Input.
Common causes
Common causes include Faulty knock sensor, Damaged wiring or connectors related to Knock Sensor 4, Issues with the ECM/PCM.
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 P1332 Description

The diagnostic trouble code P1332 indicates that there is a low input signal from Knock Sensor 4 in the vehicle's engine control module (ECM) or powertrain control module (PCM). The knock sensor is a crucial component that detects abnormal vibrations or knocking in the engine, which can be a sign of pre-ignition or detonation. Pre-ignition and detonation can lead to engine damage, reduced performance, and decreased fuel efficiency if not addressed promptly.

OBDII Code P1332 - Knock Sensor 4 Low Input
P1332 Code - Knock Sensor 4 Low Input

Common Causes of P1332

  1. Faulty knock sensor
  2. Damaged wiring or connectors related to Knock Sensor 4
  3. Issues with the ECM/PCM
  4. Engine mechanical problems causing abnormal vibrations
  5. Poor quality fuel or incorrect fuel octane rating

Symptoms of P1332

  1. Engine knocking or pinging noises
  2. Decreased engine performance or acceleration
  3. Reduced fuel efficiency
  4. Check Engine Light illuminated
  5. Engine misfires

How to Fix P1332

  1. Diagnose the issue by using a scan tool to verify the P1332 code and perform a visual inspection of the knock sensor and related wiring.
  2. Test the knock sensor with a multimeter to determine if it is functioning correctly.
  3. Check the wiring and connectors for any damage or corrosion, repairing or replacing as necessary.
  4. Clear the code from the ECM/PCM memory and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, consider replacing the knock sensor or seeking professional assistance for further diagnosis.

Cost to Fix P1332

The typical repair costs for addressing a Knock Sensor 4 Low Input issue can range from $150 to $400, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It is advisable to check local rates for a more precise estimate, as rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less.

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Code P1332 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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