Rick's Free Auto Repair Advice

Exhaust Gas Sensor Monitor — I/M Exhaust Gas Sensor Monitor

Exhaust Gas Sensor Monitor

Used only on diesel engines, the exhaust gas sensor is used to determine the content of the
exhaust stream. The computer checks for component integrity, system operation, and tests for faults in the system, as well as feedback faults that may affect other emission control systems.

The Exhaust Gas Sensor Monitor is a “Two-Trip” Monitor. If a fault is found on the first trip, the computer temporarily saves the fault in its memory as a Pending Code. The computer does not
command the MIL on at this time. If the fault is sensed again on the second trip, the computer commands the MIL “On,” and saves the code in its long-term memory.

Posted on by Rick Muscoplat

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