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June 18, 2013 Service bulletin

Ford: in some diesel trucks, the MIL may illuminate and is most common with trucks operating in low speed...

Ford technical service bulletin TSB-13-6-20 for 2012 Ford F-550 SD, 2012 Ford F-450 SD and 2012 Ford F-450 and others.

Bulletin number
TSB-13-6-20
Component
Engine and engine cooling: engine: diesel
Summary
Ford: in some diesel trucks, the mil may illuminate and is most common with trucks operating in low speed driving and/or operating in stationary idle mode for an extended periods of time, where the exhaust regeneration process is not fully completed. Model 2012 f-450, f-550 super duty.

Owners of these vehicles have filed 20 complaints in the engine category.

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