P0327 Fault Code

Knock Sensor 1 Circuit low Input (Bank 2 or Single Sensor)

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

The P0327 fault code indicates that there is a problem with the Knock Sensor 1 Circuit input, specifically for Bank 2 or a single sensor. This circuit is responsible for detecting engine knock (pinging) and sending a signal to the Engine Control Module (ECM) to adjust the ignition timing for optimal engine performance. A low input signal suggests that the knock sensor may be malfunctioning or that there's an issue with the wiring or connections in the circuit.

What are the symptoms of the P0327 code?

Common symptoms associated with the P0327 fault code include:

• Engine knocking or pinging noises under acceleration.
• Decreased engine performance or power.
• Poor fuel economy due to improper ignition timing.
• Check Engine Light (CEL) illuminated on the dashboard.

What causes the P0327 code?

Several factors can lead to the P0327 code, including:

• A malfunctioning knock sensor.
• Damaged or corroded wiring and connectors affecting the sensor signal.
• Faulty ECM unable to process the input correctly.
• Poor engine conditions such as detonation, which may cause abnormal signals.

How to fix P0327?

To resolve the P0327 fault code, consider the following steps:

• Inspect the knock sensor and its wiring for any damage or corrosion.
• Replace the knock sensor if it is determined to be faulty.
• Repair or replace any damaged wiring or connectors in the circuit.
• Clear the fault code and test drive the vehicle to see if the issue persists.