P0333 2017 GMC Sierra Code - Knock Sensor Circuit High Voltage Bank 2
Quick Answer
The P0333 diagnostic trouble code (DTC) for the 2017 GMC Sierra specifically refers to the Knock Sensor Circuit High Voltage Bank 2. Common causes include Faulty knock sensor, Wiring or connector issues in the knock sensor circuit, Engine mechanical problems causing abnormal combustion. 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
- P0333 2017 GMC Sierra indicates Knock Sensor Circuit High Voltage Bank 2.
- Common causes
- Common causes include Faulty knock sensor, Wiring or connector issues in the knock sensor circuit, Engine mechanical problems causing abnormal combustion.
- 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.
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Code P0333 2017 GMC Sierra Description
The P0333 diagnostic trouble code (DTC) for the 2017 GMC Sierra specifically refers to the Knock Sensor Circuit High Voltage Bank 2. This code indicates that the knock sensor in Bank 2 of the engine is detecting a higher voltage than expected. The knock sensor is a crucial component in the engine management system that detects abnormal combustion in the cylinders, commonly referred to as engine knock or detonation. When the knock sensor detects these abnormal vibrations or sounds, it sends a signal to the engine control module (ECM) to adjust the ignition timing to prevent engine damage.
Common Causes of P0333 2017 GMC Sierra
- Faulty knock sensor
- Wiring or connector issues in the knock sensor circuit
- Engine mechanical problems causing abnormal combustion
- ECM software issues
- Exhaust system leaks affecting sensor readings
Symptoms of P0333 2017 GMC Sierra
- Reduced engine power
- Poor fuel efficiency
- Engine misfires
- Check engine light illuminated
- Engine knocking or pinging sounds
How to Fix P0333 2017 GMC Sierra
- Diagnose the issue by using a scan tool to retrieve the DTC and inspecting the knock sensor and its wiring for any visible damage.
- Replace the knock sensor in Bank 2 if it is found to be faulty or showing signs of high voltage readings.
- Inspect and repair any damaged wiring or connectors in the knock sensor circuit.
- Address any underlying engine mechanical issues that may be causing abnormal combustion.
- Clear the DTC from the ECM and perform a test drive to ensure the issue has been resolved.
Cost to Fix P0333 2017 GMC Sierra
The typical repair costs for addressing a P0333 code in a 2017 GMC Sierra may range from $200 to $500, including the cost of a new knock sensor, labor for diagnosis and repair, and any additional parts or repairs needed. It is important to note that actual costs can vary depending on the specific location, dealership or independent repair shop rates, and the extent of the repairs required. It is advisable to obtain multiple quotes and compare prices before proceeding with the repair.
Tech Notes for P0333 2017 GMC Sierra
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Frequently Asked Questions about P0333 2017 GMC Sierra Code
What does the OBDII code P0333 mean on a 2017 GMC Sierra?
The P0333 code indicates a high voltage issue in the knock sensor circuit for Bank 2, which monitors engine vibrations to detect knocking.
What are the symptoms of code P0333 on a 2017 GMC Sierra?
Symptoms may include a check engine light, reduced engine performance, poor fuel efficiency, or engine knocking noises.
What causes the P0333 code on a 2017 GMC Sierra?
Common causes include a faulty knock sensor, damaged wiring or connectors, corrosion, or an issue with the engine control module (ECM).
Can driving with code P0333 damage my 2017 GMC Sierra?
Driving with this code for an extended period can lead to engine damage due to undetected knocking or improper engine timing adjustments.
How do you diagnose code P0333 on a 2017 GMC Sierra?
Diagnosis involves using an OBDII scanner, inspecting the knock sensor and its wiring for damage, and testing the sensor’s voltage output.
How do you fix code P0333 on a 2017 GMC Sierra?
Repairs may include replacing the knock sensor, repairing or replacing damaged wiring or connectors, or updating the ECM software.
Where is the knock sensor located on a 2017 GMC Sierra?
The knock sensors are typically located on the engine block, cylinder head, or intake manifold, and Bank 2 refers to the side of the engine with cylinder 2.
How much does it cost to repair the P0333 code on a 2017 GMC Sierra?
Repair costs vary but typically range from $150 to $400, depending on whether the knock sensor, wiring, or ECM needs replacement.
Can a bad knock sensor cause other problems in a 2017 GMC Sierra?
Yes, a faulty knock sensor can lead to poor engine performance, increased emissions, and long-term engine damage.
Do I need to replace both knock sensors if I have code P0333?
Not necessarily. If only Bank 2 is affected, you can replace the sensor on that side unless both sensors show signs of wear or damage.
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