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It does mean that you’ll have to take the vehicle to your mechanic, who will use a computer to scan the onboard diagnostics and retrieve the trouble code, also known as a P-code (for powertrain code). This code will help the mechanic diagnose why the vehicle is burning fuel inefficiently.
However, like any carpart, the knock sensor can wear out over time, leading to the question: how much will it cost to replace it? Recalibration charges: After replacing the knock sensor, the mechanic will need to reprogram or reset the Engine Control Module (ECM) to clear the error codes and recalibrate the engine’s timing.
Additional repairs: The overall cost may increase if the mechanic notices any other related issues. For example, the mechanic may find a faulty camshaft position sensor that also needs replacing. A camshaft sensor replacement can set you back another $100-$300 in labor costs and parts.
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