The Nissan Murano Knock Sensor monitors engine vibrations to detect spark knock and protect the powertrain. The Knock Sensor features a piezoelectric component that is fixed on the engine block to transform the pressure waves of detonation into a signal. This signal is sent to the powertrain control module. The Knock Sensor retards ignition timing in small steps as soon as knock appears and advances it again once combustion is normal. Thus, operation is kept near the knock limit for efficiency and safety. The Knock Sensor continually sends feedback, allowing modification to fuel quality, temperature, or load changes without causing internal damage to the engine. Each Nissan Murano with electronic ignition utilizes this component to ensure the accuracy of the spark. The system is operative in the Murano and does not require routine adjustments. The component is critical to the Nissan ignition control network. The failure of the Knock Sensor may force conservative timing that reduces Murano power and fuel economy. The fault codes associated with the failure can be found through standard diagnostics. For every Nissan Murano, there is a knock detector that complies with performance, emissions, and durability targets.
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