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The knock sensor detects the mechanical vibration signature of engine knock or detonation and signals the ECM to retard ignition timing to prevent engine damage. Signs of failure include: a check engine light with a knock sensor code, a reduction in power because the ECM has put the engine into a conservative timing map, or audible pinging under load that the ECM is no longer correcting for. Replace a faulty knock sensor to protect the engine and restore full performance.
Delphi Technologies is a major global automotive supplier with deep OE roots, manufacturing fuel systems, ignition components, sensors, and diesel technology. Known for advanced engineering and innovation, Delphi delivers proven reliability across multiple product categories, though quality can vary by specific product line.
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