What causes the DPF light to come on in my 2018 Mitsubishi Triton?
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Asked by Greg
I have my DPF filter and engine light on in my 2018 Mitsubishi Triton. What are the most common causes? I do a lot off motorway and highway driving and very little city running.
Answered by CarsGuide
26 Dec 2022DPF technology is fast becoming the bane of turbo-diesel owners. The filter is designed to trap some of the nasty exhaust emissions of a diesel engine and then automatically burn them off at high temperature periodically, emptying the filter in the process. But way too often, this isn’t happening according to the script and filters are either clogging up, requiring a manual clean-out or, in extreme cases, complete replacement.
This is possibly what’s happened to your car and explains why both the DPF and check-engine light have illuminated. It’s the car’s way of telling you you need to act. While it’s generally true that vehicles like yours that do more highway kilometres than city running have fewer DPF problems, all turbo-diesel fitted with such a filter have the potential to give trouble. An electronic scan of the Triton should show whether the DPF and check-engine light are related.
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