What are the different types of knock sensors?
There are two different types of knock sensors: vibration detection and pressure measurement. Vibration detection sensors are most common, and within those are three different types of sensors. These are inductive resonant sensors, piezoelectric resonant sensors, and piezoelectric non-resonant sensors.
What is the DTC code for knock sensor 2?
Diagnostic trouble code (DTC) P0332 stands for “Knock Sensor 2 Circuit Low Input (Bank 2).” It belongs to a range of trouble codes that are triggered by a knock sensor malfunction ( P0325 to P0334). A P0332 code gets logged when the PCM receives a reading from the knock sensor that is lower than the voltage specified by the manufacturer.
Why does my engine have a bad knock sensor?
The knock sensor detects abnormal combustion, known as spark knock, inside of the engine. Common causes of spark knock include low octane fuel, overly advanced ignition timing, abnormally high engine operating temperatures, and carbon buildup inside the engine’s combustion chambers.
Why are resonance sensors called tuned knock sensors?
For this reason, resonance sensors are sometimes referred to as “tuned” knock sensors because they’re tuned into the same frequency range as spark knock (typically, somewhere between 5,000 and 9,000 Hz).
What are knock sensors and what do they tell you?
A knock sensor is essentially a small “listening” device in or on the engine that detects these irregular vibrations and sounds that come from the engine block. The knock sensor picks up vibration and sound coming from the engine block, turns it into an electronic signal and sends that signal to the engine control unit (ECU).
What is a “knock sensor” and what does it do?
The knock sensor is located on the engine block, cylinder head or intake manifold. This is because its function is to sense vibrations caused by engine knock or detonation .
What is the main function of a knock sensor?
The knock sensor function is to detect this vibration as quickly as possible. It converts mechanical effects such as vibration, movement, and pressure into an electric signal. The sensor then transmits this signal to the ECU.
What should it cost to replace a knock sensor?
The good news is that it won’t cost you an arm and a leg to replace a bad knock sensor. If you have a standard economy vehicle, you can expect to pay anywhere from $120 to $500 for replacing your knock sensor. The parts cost will be anywhere from $65 to $200, while the labor costs will be anywhere from $50 to $350.