P0326 Fault Code

Knock Sensor 1 Circuit Range/Performance (Bank 2 or Single Sensor)

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0326 code indicates an issue with the Knock Sensor 1 Circuit for Bank 2 or a single sensor. This sensor monitors engine vibrations to detect knocking or pinging sounds during combustion. When the sensor identifies abnormal vibrations, it sends a signal to the Engine Control Module (ECM) to adjust the ignition timing, optimizing engine performance and preventing damage. If the ECM detects a range or performance issue with the signal from the knock sensor, it will set the P0326 code and trigger the check engine light.

What are the symptoms of the P0326 code?

Common symptoms associated with a P0326 code may include:

• Check Engine Light illumination
• Engine knocking or pinging noises during acceleration
• Reduced engine performance or power
• Poor fuel economy
• Vibrations in the engine that may be felt at idle.

What causes the P0326 code?

Several factors can cause the P0326 code, including:

• Faulty knock sensor
• Damaged wiring or connectors in the knock sensor circuit
• Engine control module (ECM) issues
• Engine mechanical problems affecting vibrations
• Incorrect ignition timing settings
• Contaminated or damaged knock sensor mounting area.

How to fix P0326?

To resolve the P0326 code, the following steps should be taken:

• Inspect the knock sensor and wiring for damage or corrosion. Repair or replace as necessary.
• Check the voltage and resistance of the knock sensor using a multimeter to ensure it is functioning correctly.
• Clear the error code and test drive the vehicle to determine if the code returns.
• If the code persists, further diagnose ECM functionality and consider resetting the system.
• Ensure that the engine mechanical components are in good condition and that there are no timing issues.