Asked by Kenneth Hipps on Jun 24, 2024



Trouble codes are being discussed.Technician A says that the first time the system detects a fault, a pending code is set.Technician B says that a pending code will turn on the MIL light.Who is correct?

A) A only
B) B only
C) both A and B
D) neither A nor B

Pending Code

A diagnostic trouble code that is stored in memory, but not displayed, the first time the ECM detects a potential fault. A second trip is required to confirm the fault and display a hard code.


An error or malfunction in a system, particularly in electrical or mechanical systems, indicating a deviation from normal operation.

MIL Light

Also known as the "Check Engine" light, an indicator on a vehicle's dashboard that alerts the driver to potential malfunctions within the engine or exhaust systems.

  • Familiarize with the organization and impact of assorted Diagnostic Trouble Codes (DTCs).
  • Know the conditions under which a Malfunction Indicator Light (MIL) is activated.

Verified Answer

Resheemha German

3 weeks ago

Final Answer :
Explanation :
Technician A is correct. The first time a fault is detected, a pending code is set. Technician B is incorrect, as a pending code will not turn on the MIL light. The MIL light will only turn on if the fault is detected and the code becomes a confirmed (or active) code.