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MP7 CEL


j_martell
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Truck hasn't moved in a few days, so I went out and let it run a little today, and the CEL was on when I shut it down. Used the self diagnostics and snapped a pic, anyone know what it means. Lol

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Lack of planning on your part does not constitute an emergency on my part....

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3675 Engine Turbocharger Compressor Bypass Valve Position Mid 128 PPID FMI 7

On your turbo discharge line there is a valve that opens and allows air to flow back into the intake side of the turbo. Its controlled by the DRV valve on the left side of the engine. Its a small square solenoid near the Engine ECU.

Your DRV solenoid could be bad.

Or maybe its acting up just because its cold out.

Running the truck with this code will not cause any damage.

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Okay.....shame on me, haven't got it in yet. Tomorrow for sure, only one bin to get at. The valve is only a bypass? Should I be seeing a drop in boost, because there isn't any. Is it part of the boost controlling system, or is that accomplished strictly through the variable vanes.....Sorry to pester, but I gotta know....:)

Lack of planning on your part does not constitute an emergency on my part....

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  • 3 weeks later...

5392 FMI 31 Aftertreatment DEF dosing valve loss of prime.

Basically it means your doser loss its prime.

Did the truck run out of DEF fluid? If the truck runs out of DEF fluid it can kick this code.

If it didnt run out of def fluid it will need to go to a dealer.

Could be a plugged line or bad pump. We have seen bad DEF pumps.

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Book says it's supposed to pump back to the tank on ignition off.hasnt run dry, But, we used to store def outside, and last week I dumped most of a jug in before I noticed the last little bit was frozen. Potential cause??? Will it go to derate before any serious damage?

Lack of planning on your part does not constitute an emergency on my part....

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