P0332 Code - Knock Sensor Circuit Low Voltage Bank 2
Quick Answer
The Knock Sensor system enables the Engine Control Module (ECM) to control the ignition timing for the best possible performance while protecting the engine from potentially damaging levels of detonation, also known as spark knock. Common causes include Faulty Knock Sensor Bank 2, Knock Sensor Bank 2 circuit poor electrical connection, Knock Sensor Bank 2 harness is open or shorted. 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
- P0332 indicates Knock Sensor Circuit Low Voltage Bank 2.
- Common causes
- Common causes include Faulty Knock Sensor Bank 2, Knock Sensor Bank 2 circuit poor electrical connection, Knock Sensor Bank 2 harness is open or shorted.
- 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.
Code P0332 Description
The control module learns a minimum noise level, or background noise, at idle from the knock sensor and uses calibrated values for the rest of the RPM range. The control module uses the minimum noise level to calculate a noise channel. A normal knock sensor signal will ride within the noise channel. As engine speed and load change, the noise channel upper and lower parameters will change to accommodate the normal knock sensor signal, keeping the signal within the channel. In order to determine which cylinders are knocking, the control module only uses knock sensor signal information when each cylinder is near the Top Dead Center (TDC) of the firing stroke. If a knock is present, the signal will range outside of the noise channel.
If the control module has determined that a knock is present, it will retard the ignition timing to attempt to eliminate the knock. The control module will always try to work back to a zero-compensation level, or no spark retard. An abnormal knock sensor signal will stay outside of the noise channel or will not be present. knock sensor diagnostics are calibrated to detect faults with the knock sensor circuitry inside the control module, the knock sensor wiring, or the knock sensor voltage output. Some diagnostics are also calibrated to detect constant noise from an outside influence such as a loose/damaged component or excessive engine mechanical noise.
The Diagnostic Trouble Code (DTC) will be set when the signal from the Knock Sensor Bank 1 is short to ground for greater than 5s.
What are the Possible Causes of the DTC P0332?
- Faulty Knock Sensor Bank 2
- Knock Sensor Bank 2 circuit poor electrical connection
- Knock Sensor Bank 2 harness is open or shorted
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0332?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
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What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0332 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Information for Specific Makes
- P0332 Audi — Knock Sensor 2 Circuit Low
- P0332 Buick — Knock Sensor Circuit Low Voltage Bank 2
- P0332 Cadillac — Knock Sensor Circuit Low Voltage Bank 2
- P0332 Chevrolet — Knock Sensor Circuit Low Voltage Bank 2
- P0332 Ford — Knock Sensor 2 Circuit Low Bank 2
- P0332 GMC — Knock Sensor Circuit Low Voltage Bank 2
- P0332 Infiniti — Knock Sensor 2 Circuit Low Input Bank 2
- P0332 Isuzu — Knock Sensor 2 Circuit Low Frequency
- P0332 Jaguar — Knock Sensor 2 Circuit Low Bank 2
- P0332 KIA — Knock Sensor 2 Circuit Low Input
- P0332 Lexus — Knock Sensor 2 Circuit Low Input
- P0332 Mercedes-Benz — Knock/Combustion Vibration Sensor 2 Circuit Low Bank 2
- P0332 Mitsubishi — Knock Sensor Circuit Low Bank 2
- P0332 Nissan — Knock Sensor 2 Circuit Low Input Bank 2
- P0332 Pontiac — Knock Sensor Circuit Low Voltage Bank 2
- P0332 Saturn — Knock Sensor Circuit Low Voltage Bank 2
- P0332 Scion — Knock Sensor 2 Circuit Low Input
- P0332 Subaru — Knock Sensor 2 Circuit Low Input Bank 1 Or Single Sensor
- P0332 Toyota — Knock Sensor 2 Circuit Low Input
- P0332 Volkswagen — Knock Sensor 2 Circuit Low
Frequently Asked Questions about P0332 Code
1. What are common symptoms of OBDII code P0332 (Knock Sensor Circuit Low Voltage Bank 2)?
- Common symptoms include engine knocking or pinging noises, decreased engine performance, and the illumination of the check engine light.
2. What are the possible causes of OBDII code P0332?
- Possible causes include a faulty knock sensor, damaged wiring or connectors in the knock sensor circuit, engine detonation, or issues with the engine control module.
3. How does a knock sensor work in a vehicle?
- A knock sensor detects abnormal engine vibrations or knocking caused by pre-ignition or detonation, sending signals to the engine control module to adjust ignition timing and prevent engine damage.
4. How can I diagnose the cause of OBDII code P0332?
- Diagnosing the issue may involve inspecting the knock sensor and its wiring, checking for engine detonation, and using a scan tool to monitor sensor readings and engine performance.
5. Can a faulty knock sensor cause other problems besides triggering OBDII code P0332?
- Yes, a faulty knock sensor can lead to reduced engine performance, decreased fuel efficiency, and potential long-term engine damage if not addressed promptly.
6. What are the repair options for OBDII code P0332?
- Repair options may include replacing the knock sensor, repairing damaged wiring or connectors, addressing engine detonation issues, or reprogramming the engine control module.
7. Is it safe to continue driving with OBDII code P0332 present?
- It is generally not recommended to continue driving with this code present, as it can lead to reduced engine performance, potential engine damage, and increased emissions.
8. Can I reset the check engine light after addressing OBDII code P0332?
- Yes, once the underlying issue causing the code has been repaired, the check engine light can be reset using an OBDII scanner to clear the code and turn off the light.
9. How important is the knock sensor in a vehicle's engine performance?
- The knock sensor plays a crucial role in protecting the engine from damage by detecting abnormal vibrations and ensuring proper ignition timing, ultimately contributing to optimal engine performance.
10. Are there any preventive measures to avoid OBDII code P0332 in the future?
- Regular maintenance, such as checking and replacing the knock sensor at recommended intervals, monitoring engine performance, and using high-quality fuel, can help prevent issues leading to OBDII code P0332.
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