The misfire monitor uses a high data rate CKP [crankshaft position] sensor to detect engine misfires, and the CMP [camshaft position] sensor is used to identify which cylinder is misfiring.

Question

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The misfire monitor indeed uses a high data rate CKP sensor to detect engine misfires by monitoring the rotational speed of the crankshaft for fluctuations that indicate a misfire. The CMP sensor is then used to determine which cylinder is misfiring by identifying the position of the camshaft, which is linked to the opening and closing of the valves in specific cylinders.

The Misfire Monitor Uses a High Data Rate CKP [Crankshaft