P033E – Knock Sensor 4 Circuit Intermittent Bank 2

P033E Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P033E Possible Causes

Faulty Knock Sensor 4 Bank 2,Knock Sensor 4 Bank 2 circuit poor electrical connection,Knock Sensor 4 Bank 2 harness is open or shorted,Faulty Engine Control Module (ECM)

P033E Description

The Knock Sensor (KS) senses engine knocking (also known as detonation or pinging) using a piezoelectric element. The sensor is attached to the cylinder block, cylinder head or intake manifold. A knocking vibration from the cylinder block is sensed as vibrational pressure. This pressure is converted into a voltage signal and sent to the Engine Control Module (ECM). The ECM uses this signal to retard the ignition timing and protect the engine from this damaging pre-ignition.