P0327 - KNOCK SENSOR CIRCUIT LOW INPUT

The KS sensor (Knock Sensor) is responsible for notifying the ECM (Engine Control module) in case one or more of its cylinders suffer “knocks”, this means that the energy produced by the air / fuel mixture is negative, and this can harm the engine if it lasts for a while. This information is used by the Engine Control Module (ECM) to adjust the motor, so that it does not hit in this way.

In the event that the Knock Sensor (KS), located in the bank number1 is developing a low output voltage, which may be 0.5 volts, the DTC code P0327 is established. This code may appear intermittently.

• Turn on the service light on the Check Engine board.
• Possibly the engine may lose power or force.
• Engine RPM may vary.

A P0327 code can be caused by one or more of the following problems:

• A bad electrical connection in the KS sensor (Knock Sensor).
• Some cable in the Knock Sensor (KS) circuit may be wearing or rubbing with some component and resulting in a short circuit.
• The Knock Sensor (KS) may be defective.
• The Engine Control Module (ECM) / Power Train Control Module (PCM) could present faults.

To fix the DTC code P0327 you can check the following components:

• Compared to the factory specifications, check the resistance of the Knock Sensor (KS).
• Check that there are no broken or damaged cables, which lead to the KS sensor. Repair or change if necessary.
• Check the electrical connections that lead from the Detonation Sensor (KS) to the Engine Control Module (ECM) and repair if necessary.
• Make sure that the KS Sensor (Knock Sensor) voltage is appropriate (5 volts).
• Check that the ground connection is adequate for both the sensor and the circuit.
• Change the Knock Sensor (KS).