P032B - Knock Sensor 3 Circuit Range/Performance (Bank 1)

P032B indicates that the Engine Control Unit (ECU) has detected an abnormal signal from Knock Sensor 3 on Bank 1. The knock sensor is a piezoelectric sensor that monitors vibrations caused by uncontrolled combustion (knocking/detonation). The ECU expects a specific voltage waveform and frequency. If the signal falls outside the predefined limits—either too high, too low, or inconsistent during certain engine loads—the P032B code is stored. This affects ignition timing as the ECU will retard timing as a safety measure to protect the engine from damage.