![]() However, the excess soot build-up in a vehicle’s particulate filter is the major reason why the DPF warning light displays. When this component malfunctions, it will send wrong signals to the onboard computer system, which may unnecessarily trigger the DPF warning light. The warning light signifies that the onboard computer system has detected excess soot build-up in the particulate filter, which is liable to trigger limp mode.Īnother cause of the DPF warning light display is a defective pressure or temperature sensor. The primary cause of the diesel particulate filter (DPF) warning light display is a blocked particulate filter. ![]() What Causes Diesel Particulate Filter Warning Light? Find out what triggers the light and how to fix it in the subsequent sections below. One of the early symptoms that you will have to deal with is the DPF warning light. Ignoring the soot build-up can be detrimental in the long run. However, the filter can be clogged over time. The particulate filter is designed to eradicate the soot from the exhaust. This is a common challenge that diesel engine vehicle owners must learn to deal with before the problem arises.Ī vehicle’s exhaust is bound to build up soot over time from constant combustion. ![]() Diesel particulate filter warning light is an indication that this particular filter needs to be cleaned or replaced soon to avoid the car going into limping mode.
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