470 code annoyance only?
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Junior User
Joined: Nov 2002
Posts: 97
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From: Morristown USA
470 code annoyance only?
I've been getting a 470 code and 478. EBPV tube is rotted away and mostly plugged. I see a lot of code eliminaters available and many suggestions on how to gut the EBPV. My question is: What harm is there in this code?
Senior User
Joined: Dec 2006
Posts: 230
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From: Cheyenne, WY
Only thing I can think of is that it may hamper diagnostics.
I for one don't want some unrelated code to send me on a wild goose chase, or prevent me from running some other diagnostic test.
I know that the AIH delete code will hamper some tests.
Need to get eliminators for EPBV and AIH myself.
I for one don't want some unrelated code to send me on a wild goose chase, or prevent me from running some other diagnostic test.
I know that the AIH delete code will hamper some tests.
Need to get eliminators for EPBV and AIH myself.
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Junior User
Joined: Nov 2002
Posts: 97
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From: Morristown USA
After thinking about it.. With the 470 code set even without running the truck it must be saying it's got either an open or shorted circuit. I clear the code, run diagnostics again and it's back without turning over the engine. I can see that if the code is telling me that it sees not pressure it would attemp to close the butterly valve, or if it's stuck with a high reading it would open the valve (I assume this is what the eliminators do). So did the Ford engineers also program that if during ignition checks it finds a faulty signal, it should open the valve just in case?
Post Fiend
Joined: Jul 2005
Posts: 14,582
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From: 21791
So you say the tube from the exhaust manifold is corroded away and most likely plugged? Well then the sensor on the end of the tube is doing nothing! That can cause performance and drivability issues, id recommend blowing the sensor out with compressed air, and replacing the tube.
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Junior User
Joined: Nov 2002
Posts: 97
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From: Morristown USA
That's the tube strokinit. I bought some new tubing today and bent it into shape. amazing what a dremel and patience can do. the Stealer wanted $61 for it. I live in MN and see the benefit of a fast warm up. I'm just not sure of why the 470 code comes up without the engine running. I'm gonna guess though it takes a reading of atmospheric pressure during ignition on tests. Anyone know how to test the EPBV?
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