:please: explain p0471! - Ford Powerstroke Diesel Forum
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Old 04-08-2013, 05:52 PM
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:please: explain p0471!

I can't find anything on what this code does...... I know what it is but what does it cause? Why is it being thrown?
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Old 04-08-2013, 05:56 PM
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OBD2-OBDII Engine Light Trouble Code P0471 FORD - Exhaust Pressure Sensor Range/Performance | Engine-Codes.com

P0471 FORD - Exhaust Pressure Sensor Range/Performance

Possible causes
- Faulty Exhaust Back Pressure Sensor
- Exhaust Back Pressure Sensor harness is open or shorted
- Exhaust Back Pressure Sensor circuit poor electrical connection

Tech notes
Replacing the exhaust back pressure usually takes care of the problem

P0471 FORD Description
The Exhaust Back Pressure (EBP) sensor is a variable capacitance sensor that, when supplied with a 5-volt reference signal from the Engine Control Module (ECM), produces a linear analog voltage signal that indicates pressure.

The EBP sensor's primary function is to measure exhaust back pressure so that the ECM can control the exhaust back pressure regulator (EPR) when needed.
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Old 04-08-2013, 05:59 PM
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Thanks! I did not know this sight existed.
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Old 04-08-2013, 05:59 PM
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Would this code be causeing this?


I think i blew/ started to blow my turbo..school me. I think my turbo is on the fritz.... What do I look for? What are the symptoms?

When I go to accelerate I can mash the pedal to the floor and it takes 4-5 seconds before it will go. When it goes it goes, but it takes forever! At cruising speeds 45-70 in my area depending on the road, it jumps and bucks like crazy.
I'm hearing a slightly different whistle from it than normal.
Also, when I shut the truck of, there is a horrible knocking/grinding noise real quick like, like a fast 3 count.
I have really bad compressor surge too.... A wicked wheel is on its way....
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Old 04-08-2013, 06:26 PM
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Quote:
Originally Posted by Macon View Post
OBD2-OBDII Engine Light Trouble Code P0471 FORD - Exhaust Pressure Sensor Range/Performance | Engine-Codes.com

P0471 FORD - Exhaust Pressure Sensor Range/Performance

Possible causes
- Faulty Exhaust Back Pressure Sensor
- Exhaust Back Pressure Sensor harness is open or shorted
- Exhaust Back Pressure Sensor circuit poor electrical connection

Tech notes
Replacing the exhaust back pressure usually takes care of the problem

P0471 FORD Description
The Exhaust Back Pressure (EBP) sensor is a variable capacitance sensor that, when supplied with a 5-volt reference signal from the Engine Control Module (ECM), produces a linear analog voltage signal that indicates pressure.

The EBP sensor's primary function is to measure exhaust back pressure so that the ECM can control the exhaust back pressure regulator (EPR) when needed.
Where is the EPR and what does it look like? Never knew these trucks had such a thing


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Old 04-08-2013, 06:57 PM
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right side of the hpop reservoir. 99 and newer on the back. 97 front
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Old 04-09-2013, 05:28 AM
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Interesting. Now I gotta go look lol. Learn something everyday. How does the truck control EBP? With the waste gate? That's about the only way I can figure since these aren't VGT turbos


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Old 04-09-2013, 05:37 AM
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I'm still kinda confused.... I had my valve at the turbo unplugged.... Maybe its stuck or something an causing my performance issues? I plugged it in last night. I'm riding with dad today so I haven't had a chance to test....
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Old 04-09-2013, 05:57 AM
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Is it hissing like the ebpv is on?


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Old 04-09-2013, 06:13 AM
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Naw not hissing....
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