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  #1  
Old 08-11-2011, 12:37 AM
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Code P0475

Exhaust Pressure Control Valve Malfunction

What would cause that code to show up every time I start the truck
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97 CCSB 4WD DRW 7.3 5spd DP Tuner, 6637, 4" Flo-Pro SS Exhaust(3" DP), 99 I/C, T500,Cali Truck w/120cc Split Shot Injectors, 1.0 exhaust housing/WW2, Irate Up-pipes, CCV Mod, Autometer gauges, Valair Organic clutch, PFM 2.25" RSK, PMF Traction bars, Rear Air bags,SD springs Front(V code)/rear(B code), 315/75/16s, (6)Alcoa 16x6 wheels 300HP/561TQ

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  #2  
Old 08-11-2011, 01:06 AM
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Re: Code P0475

maybe the ebpv? mine cycles everytime i start,and then opens up.
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Old 08-11-2011, 01:33 AM
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Re: Code P0475

I dont even hear mine, I just figured since it was warm out
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Old 08-11-2011, 01:42 AM
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Re: Code P0475

mine will cycle even when its warm. is yours unplugged or gutted?
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Old 08-11-2011, 02:02 AM
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Re: Code P0475

Tell you the truth, I have no clue
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Old 08-11-2011, 02:13 AM
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Re: Code P0475

Unplug it to be sure, don't want to have it get stuck closed. Probably the mechanism in the pedestal is shot. Does it kick on fine in the winter?
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Old 08-11-2011, 02:13 AM
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Re: Code P0475

If it is unplugged, gutted, malfunctioning, or gone all together you will get that code. Mine is gone as I have the h2e and I get that code all the time.
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Old 08-11-2011, 02:32 AM
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Re: Code P0475

I only have had the truck for about 4 months.

As for having it unpluged, I have had it unplugged on 2 of my other trucks but never had a code
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Old 08-11-2011, 07:48 PM
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Re: Code P0475

Brad, is this on the 97? I'm not sure if this is a 97 thing only or not (probably not)

Here's some info from the "1997 MY OBD System Operation Summary for 7.3L Diesel Engine":

Quote:
Exhaust Pressure Regulator (EPR) Valve Check Operation:
DTCs: P0475 – Exhaust press control valve malfunction
Monitor execution: Continuous
Monitor Sequence: None
Sensors OK: Not applicable
Typical Monitoring Duration: Internal to Chip
Exhaust Pressure Regulator (EPR) Valve Check Entry Conditions: No entry conditions
Exhaust Pressure Regulator (EPR) Valve Check Malfunction thresholds: Actuator driver status indicates open/short
Here is probably a better summary: "Exhaust Back Pressure (EPR) Regulator"

Hope that helps. Cheers!
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Old 08-11-2011, 10:44 PM
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Re: Code P0475

Brad if it is a Cali model truck it will throw that code when unplugged but not on the federal trucks.
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