Which indicator activates when the diesel particulate filter (DPF) is loading up with soot?

The diesel particulate filter (DPF) indicator is specifically designed to alert the driver when the DPF is accumulating soot and requires attention. When the filter becomes clogged with soot, the indicator activates to notify the operator that regeneration is needed to clean the filter and restore its efficiency. This indicator is an essential part of monitoring the DPF’s performance, as it helps prevent potential engine damage and ensures compliance with emission regulations.

In contrast, the manual regeneration switch allows the driver to manually initiate a regeneration process but does not provide a specific alert regarding soot loading. The regeneration inhibit switch prevents regeneration from occurring, which does not indicate a soot buildup but rather restricts the process under certain conditions. The high exhaust system temperature indicator relates to exhaust temperatures rather than soot accumulation within the DPF. Therefore, the DPF indicator is the most appropriate choice for signaling that the filter is loading up with soot, making it a critical aspect of maintaining optimal engine performance and emissions control.