Asked by Jennifer Texta on May 16, 2024
Verified
The signal that alerts the misfire monitor that a misfire may be occurring is provided by the:
A) MAP sensor
B) knock sensor.
C) downstream HO2S sensor.
D) crankshaft position sensor.
Misfire
An engine condition where a cylinder fails to ignite its fuel/air mixture properly, leading to performance issues.
MAP Sensor
Stands for Manifold Absolute Pressure Sensor, which measures the air pressure within the intake manifold to adjust fuel delivery and engine load calculations.
Knock Sensor
A device in an internal combustion engine that detects engine knock or pinging, which is a symptom of pre-detonation, and signals the control unit to adjust the ignition timing.
- Understand how the OBD II system detects misfires and the significance of different types.
Verified Answer
CQ
Crystal QuinteroMay 22, 2024
Final Answer :
D
Explanation :
The crankshaft position sensor is crucial for detecting engine misfires. It monitors the speed of the crankshaft, and any irregularities in its rotation speed can indicate a misfire. This sensor's data is used by the engine control unit (ECU) to diagnose and address misfires, ensuring optimal engine performance.
Learning Objectives
- Understand how the OBD II system detects misfires and the significance of different types.