hi everyone, changed my DPF filters and the next day , I got a check engine light on. No codes until I got to mechanic and he pulled this up. wondering what it might be . He is not quit sure either but its something to do with poor def quality.
spn 520371 fmi 16
Discussion in 'Freightliner Forum' started by AlexD13, Oct 18, 2021.
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Did you replace the DPF's for preventive maintenance, or was there a fault?
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I would verify that the DOC inlet temp sensor wasn't damaged and pull the cover off and check for leaks, and that the clamps are situated correctly. It can be tricky in a one box to get the inside front clamp on there properly.
AlexD13 Thanks this. -
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Did you find the issue?
I'm having the same code -
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Troubleshooting of this code
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