Which condition would likely lead to a faulty CMP sensor diagnosis?

A faulty camshaft position (CMP) sensor diagnosis is often linked to an intermittent electrical connection because such a condition can cause the sensor to provide erratic signals to the engine control module (ECM). When there is an intermittent connection, the sensor might function normally at times and fail at others, leading to varying readings. This fluctuation can confuse the diagnostic tools and the technician, causing misdiagnosis. An intermittent electrical connection does not provide reliable data, making it difficult to pinpoint whether the sensor itself is faulty or if it is an issue with the wiring or connectors.

In contrast, consistent voltage output is indicative of a properly functioning sensor, as it suggests that the sensor is providing stable data to the ECM. A three-wire connector is a standard feature of many sensors and indicates that the sensor can receive power, ground, and output signals; its presence alone does not imply a fault. Improper installation angle could affect the sensor's performance but would typically result in a more predictable symptom set rather than the erratic behavior causing confusion in diagnostics. Thus, an intermittent electrical connection stands out as the most likely cause of a faulty diagnosis for the CMP sensor.