P0334 Knock Sensor 2 Circuit Intermittent Bank 2

Definition: The P0334 code indicates that the Engine Control Module (ECM) has detected an intermittent signal from the knock sensor circuit for bank 2, which is responsible for monitoring engine knocking or pinging.

p0334: Knock Sensor 2 Circuit Intermittent Bank 2 – Moderate

Common Causes

p0334 – Knock Sensor 2 Circuit Intermittent Bank 2

Common Causes:

• Faulty knock sensor
• Loose or corroded wiring connections to the knock sensor
• Engine knocking or pinging causing false readings from the sensor
• Issues with the engine control module (ECM)

Common Misdiagnosis

OBD2 Code: P0334

Description: Knock Sensor 2 Circuit Intermittent (Bank 2)

Common Misdiagnosis: Replacing the knock sensor without checking for wiring issues or poor electrical connections.

Common Diagnostic Steps

OBD2 Code: P0334

Description: Knock Sensor 2 Circuit Intermittent Bank 2

• Check for any technical service bulletins (TSBs) related to the vehicle’s make and model.
• Inspect the wiring and connectors for damage, corrosion, or loose connections at the knock sensor and PCM/ECM.
• Test the knock sensor using a multimeter to ensure it is functioning properly.
• Verify that the engine control module (ECM) is receiving a signal from the knock sensor.
• Check for proper grounding of the knock sensor circuit.
• If applicable, inspect and test other components in the circuit such as relays or fuses.
• Perform an ECM update or reflash if recommended by TSBs or manufacturer guidelines.
• If all else fails, replace the knock sensor with a new one and retest to confirm resolution of the issue.