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P1421 Diagnostic Trouble Code Discussion for February 2017

Cold Start Emission Reduction Strategy Monitoring


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Trouble Ticket Help Requests for DTC P1421
Help Request Posted
2008 Mitsubishi Fuso FE180 FE85D 4.9L loss of power VIN: JL6CCJ1SX8
P1421: catalytic/DPF. Replaced parts mentioned above. Did the manual DPF burn in and it ran great. About 100 miles later, it had the same problem of loss of power. Then it did begin to run OK again but later had no power under load. Now has no check engine light and local Fuso serv...
February 10, 2017