P0332 Code Chevy Silverado- How To Fix?

Code P0332 Definition

  • Code P0332: Knock Sensor 2 Low Circuit Input (Bank 2)
  • Issue Severity: SEVERE – Stop driving immediately
  • Repair Urgency: To prevent internal engine harm, fix this code right away (on the same day if at all possible).
  • Diagnosis: Pinging shortens an engine’s lifespan and can degrade its capacity to operate cleanly and effectively. If the knock sensor is broken, the PCM cannot get accurate data, which could shorten the engine’s lifespan.

What Does knock sensor bank 2 mean?

Knock sensors are only used to determine when the engine is “knocking,” or to detect when the air/fuel mixture bursts in a manner that delivers less power and, if repeated, will also destroy the engine. There is an excessive volume of NOx that is produced as the engine ‘knocks’.

When trouble code P0332 is set, the Power Control Module (PCM) has received a reading from knock sensor 2 in Bank 2 that is too low, and it will not be able to accurately send a ping to correct a problem.

Where is the knock sensor located?

The knock sensor acts as an ear to the computer of your vehicle, mounted on the cylinder head, intake manifold, or engine block, picking up irregular noises caused by engine detonation.

What causes a knock sensor to go off or p0332 code?

  • Faulty knock sensor
  • Fault in the knock sensor circuitry
  • Faulty EGR system
  • An air/fuel ratio that’s too lean
  • A problem with the cooling system

Symptoms of a P0332 Code Chevy Silverado?

  • Check Engine Light
  • Higher emissions
  • Loss of power
  • Pinging in the engine
  • Lower fuel economy

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How To Diagnose Code P0332 Chevy Silverado?

Tools Needed to Diagnose:

The mechanic will start with a visual evaluation of the sensor and its circuit after first verifying the code with an OBD-II scanner. The circuit, connectors, and other relevant components will then probably be tested using an ohmmeter and other diagnostic instruments.

They will reset the PCM’s code after each test and/or repair, retest the system, and start the car. To make sure there isn’t an intermittent issue that has to be fixed, they may occasionally do a brief or lengthy test drive.

Typical mistakes made when examining the P0332 code

  • Failure to correctly inspect and identify the cause of the issue.
  • When the wiring or connectors were the real issues, a knock sensor will be changed.
  • Replacing the knock sensor won’t help the situation in some other scenarios when the cooling system or EGR system is to blame.

Do I have to worry about the P0332 Code?

The ability of an engine to function cleanly and effectively can suffer significantly from engine pinging. The PCM cannot forecast and make corrections for a problem if the knock sensor is not operating properly. This may result in a rough-running engine, overheating, reduced fuel efficiency, and other issues.

The Most Typical Fixes for a P0332 Error Code

  • Replacing frayed or broken wires and connectors in the sensor circuit
  • Ensuring that the sensor and circuit are properly grounded
  • Replacing the knock sensor
  • Addressing the root cause in the EGR or cooling system
  • Replacing or reprogramming the PCM (rare)

How to Fix Code P0332?

To determine the root of a knock sensor malfunction, the first step is to have it diagnosed.

If your car has this problem and you’re not confident diagnosing it yourself, we advise locating a Repair certified shop nearby to identify the issue and provide a precise repair quotation.

These shops can not only identify the issue before you waste time and money on the incorrect parts, but they can also guarantee fair pricing on all of their estimates and provide a warranty that lasts at least 12 months and 12,000 miles.

Here are some experts you can call and ask your question.

Find your Local and Trusted Mechanic Nearby

How much does it cost to replace a knock sensor on a Silverado?

Estimated Repair Costs for P0332:

  • Knock sensor: $320 to $450
  • Knock sensor harness: $20 to $80
  • Temperature sensor: $432 to $540

DIY Procedures for Code P0332 Diagnosis

Let me be clear: It’s not an easy task to diagnose and fix it using basic OBD2 scanners; you need other specialized tools and a skilled individual to do so. As a result, I would not advise those DIYers to do it themselves in order to save money on the repair but lack the knowledge and experience necessary to do so.

So here is a How to do step by step:

Tools/parts needed 


1- Make Sure There Are No Other Engine Error Codes: Scan your car using OBD2 to make sure P0332 is the only code there. If not, take note of the extra codes since they aid in problem diagnosis.

2- Remove Codes and Conduct a Road Test: With your OBD2 sensor, clear the error codes, and then take a drive to see if the issue reappears. Include some incline and rapid acceleration, both of which might result in engine knock. Check the codes once more to determine if they are the same or different from the initial scan if the Check Engine Light reappears.

3- Check The Signal From The Knock Sensor: Using OBD2 Live Data, check the knock sensor voltage to ensure that it is within the specified range. If it is not, or if there is no signal at all, skip to Step 5.

4- Verify The Temperature Sensor Signal: Verify the voltage of the temperature sensor to make sure it falls within the permitted range using OBD2. If it isn’t, the temperature sensor can be giving the PCM erroneous readings, which could lead to an engine knock and a lean running condition. Check the wiring and temperature sensor, and replace them if necessary.

5- Inspect Knock Sensor Wiring: Visually inspect the wiring around the knock sensor for disconnected or damaged wires.

6- Check The Wiring For The Knock Sensor And Replace It With A New Harness: It is frequently advised to repair both the sensor and the knock harness if it is determined that the knock sensor has to be changed.

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Most frequent questions Related to PO332

Can you replace a knock sensor yourself?

Any problems with a knock sensor should be dealt with instantly, as the pistons can be affected by constant pre-ignition and potentially destroy the engine itself. If you are a frequent DIYer, you should mount a knock sensor yourself, as the sensor merely needs to be replaced and the right wires attached.

Can I drive with a bad knock sensor?

When driving on the highway, a bad knock sensor cannot allow the engine to accelerate properly and cause the car to lose fuel mileage. … Your car will most likely lose control if the machine knows the knock sensor is not functioning properly.

Can bad spark plugs cause knock sensor code?

A sparkplug would never cause a knock sensor check engine light.

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Why Is My Car Shaking And Check Engine Light On?

Will a car run without a knock sensor?

There could be a complete absence of the knock sensor and it would not stop the car from starting. You can drive with a bad knock sensor, but if there is a lot of pre-ignition, it will have adverse long-term consequences on the engine, and the vehicle will not pass most state checks until it is repaired.


About The Author

Avatar for Ibrar Ayyub

Ibrar Ayyub

I am an experienced technical writer holding a Master's degree in computer science from BZU Multan, Pakistan University. With a background spanning various industries, particularly in home automation and engineering, I have honed my skills in crafting clear and concise content. Proficient in leveraging infographics and diagrams, I strive to simplify complex concepts for readers. My strength lies in thorough research and presenting information in a structured and logical format.

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