P0332 OBD-II Trouble Code: Knock Sensor 2 Circuit Low Input (Bank 2)

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0332 code

P0332 is a diagnostic trouble code (DTC) for "Knock Sensor 2 Circuit Low Input (Bank 2)". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$20.00
Toyota$20.00
BMW$20.00
SCHEDULE P0332 DIAGNOSTIC Get a fair and transparent estimate upfront

P0332 code definition

If the knock sensor 2 circuit gives a low input signal, the PCM (powertrain control module) record a P0332 code and illuminate the Check Engine Light.

What the P0332 code means

The knock sensor’s purpose is to signal to the PCM when the engine is pinging. If the PCM is receiving a reading from the knock sensor that is too low, it will not be able to accurately send the appropriate signal of a ping, and the PCM will not be able to correct the problem. This can result in higher emissions and other problems for the engine, as well.

What causes the P0332 code?

When a P0332 code is stored, the most common causes are:

  • A faulty knock sensor
  • A fault in the knock sensor circuit or its connectors
  • An air/fuel ratio that’s too lean
  • A problem with the cooling system
  • A defective EGR (exhaust gas recirculation) system

What are the symptoms of the P0332 code?

In some rare cases, there will be no other symptom besides the Check Engine light coming on. Most times, though, you will notice one or more of the following symptoms:

  • Pinging in the engine when accelerating
  • Increased engine heat under normal operation
  • Lack or loss of power

How does a mechanic diagnose the P0332 code?

After verifying the code with an OBD-II scanner, the mechanic will then begin with a visual inspection of the sensor and its circuit. They will then likely use an ohmmeter and other diagnostic tools to test the circuit, connectors, and other related components.

After each test and/or repair, they will clear the code from the PCM and retest the system by turning the vehicle on. In some cases, they will take a short or extended test drive to ensure that there is not an intermittent problem that needs to be addressed.

Common mistakes when diagnosing the P0332 code

The most common mistakes associated with this code have to do with a failure to properly inspect and diagnose the root of the problem. In some cases, a knock sensor will be replaced when the problem was actually with the wiring or connectors. In other cases, the problem could be the cooling system or EGR system, in which case replacing the knock sensor will not do anything to resolve the issue.

How serious is the P0332 code?

Engine pinging can take a serious toll on an engine’s ability to run cleanly and efficiently. If the knock sensor is malfunctioning, the PCM cannot get the proper information from it to predict and correct for the problem. This can lead to an engine that runs rough, overheats, has decreased fuel efficiency, and other problems, as well.

What repairs can fix the P0332 code?

Some of the repairs that most commonly fix a P0332 code are:

  • 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)

Additional comments for consideration regarding the P0332 code

Even if you notice no other issues or symptoms with your vehicle, the P0332 code will result in an illuminated Check Engine light. If this light is on when you go in for an OBD-II emissions test, your vehicle will not pass. In most states, and with most vehicles, this means that you will not be able to legally register your vehicle or renew your registration. Getting this issue resolved early can avoid a lot of headaches, as well as more involved and expensive repairs down the road.

Need help with a P0332 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

trouble codes
P0332
Check Engine Light

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0332 code.

SCHEDULE P0332 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.8/5

Number of Reviews

5,079

Rating Summary
4,679
195
48
27
130
4,679
195
48
27
130

Robert

39 years of experience
15 reviews
Robert
39 years of experience
Jaguar S-Type - Check Engine Light is on - Scottsdale, Arizona
Bob is very thorough and an all-around professional. I'll be booking his service for both my cars as often as work is needed.

Eduardo

18 years of experience
353 reviews
Eduardo
18 years of experience
Dodge Dakota - Check Engine Light is on - Stafford, Texas
Great guy very knowledgeable and very professional one of the best mechanics I've ever met. He explained what was going on and let me know my options. Will be asking for him again!

Michael

15 years of experience
524 reviews
Michael
15 years of experience
Toyota Corolla - Check Engine Light is on - Atlanta, Georgia
Michael was a great mechanic, and nice guy. He was knowledgeable and offered examples of my current problems while also sharing solutions.

Juan

8 years of experience
53 reviews
Juan
8 years of experience
Honda Pilot - Check Engine Light is on - Chapel Hill, North Carolina
Great job, explained the situation to me and told me to try to get the dealer to repair it under warranty. I certainly will but if they give me a song and dance I will be back and have Juan do it in a heartbeat. I’m well pleased.


Related questions

1999 firebird every now and then dies while driving and low engine power light comes on

A bad mass airflow (MAF) sensor can cause loss of power, no starts, and lean or rich conditions. If cleaning the sensor did not get rid of the P0102 trouble code, then replace the MAF sensor and clear the...

Knock sensor P0332 2004 Chevrolet Express 2500

Hi there - the P0332 problem code indicates a "low signal", which can mean a bad knock sensor, but it can also mean "no signal", as in, a wiring problem. Check the connections to the sensor for good connectivity, and...

I'm ready to buy a 2004 Chevy Silverado but chk engine light shows Knock Sensor. Also Oil Pan Leak, Fr Axle Seals Leak. Buy? Cost?

Hello Mike. You have found yourself in a position where there is a lot to consider, and the choice is going to come down to how much risk you are willing to take with this truck. Starting with the knock...

More related articles

P0083 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 1 Sensor 2)
P0083 P0083 code definition P0083 is a general OBD2 code indicating a issue with bank 2 intake valve control solenoid. This code may be seen with P0081 and P0082. The vehicle also has a bank 1 valve control solenoid. What...
P2190 OBD-II Trouble Code: System Too Rich at Idle Bank 2
P2190 P2190 code definition System Too Rich at Idle Bank 2 What the P2190 code means This code indicates there is too much fuel in relation to air (air/fuel ratio) in bank 1 at idle only. Bank 1 is...
P0470 OBD-II Trouble Code: Exhaust Pressure Sensor Malfunction
P0470 means the sensor in charge of assessing exhaust pressure isn't working due to the back pressure sensor or poor electrical connection.

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com