Who is correct regarding the definition of a 'pending' code?

A 'pending' code refers to a diagnostic trouble code (DTC) that the vehicle's computer has detected but has not yet triggered a check engine light or warning light. This situation typically occurs when a fault is intermittent or hasn't occurred consistently enough to merit a permanent code.

Both technicians provide accurate definitions and insights regarding pending codes. Technicians may describe pending codes as being in a sort of limbo; they suggest that a fault has occurred and is being monitored but is not severe enough to warrant immediate action like illuminating a check engine light. This means that while the engine control module (ECM) is aware of potential issues, it recognizes that the problem may not always be present. Therefore, it is necessary to monitor the situation closely as a pending code may result in a permanent code if the issue persists.

In practical applications, understanding pending codes is crucial for effective diagnostics. Technicians must be able to recognize these codes to prevent missing intermittent issues that could develop into more significant problems. Thus, both technicians are correct in their definitions, which supports the answer that both A and B are correct regarding pending codes.