Exhaust Backpressure Sensor Code Eliminator
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Lead Driver
Joined: Oct 2004
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From: Columbia, MO
Exhaust Backpressure Sensor Code Eliminator
Black Cloud has an Exhaust Backpressure Sensor Code Eliminator on their site to eliminate the P0478 code. I'm consistently getting this code, even after I clear them out, it's immediately back.
Anyone have any experience with this?
Would there be any negatives to eliminating the code with this product?
I'm wondering how a bad sensor would affect performance and mileage. My truck seems to be running great.
Any input would be appreciated.
Anyone have any experience with this?
Would there be any negatives to eliminating the code with this product?
I'm wondering how a bad sensor would affect performance and mileage. My truck seems to be running great.
Any input would be appreciated.
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Joined: Jan 2004
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From: colorado
the EBPV code is not a defuel code. you will keep getting the code because of your mods (the extra fuel you have is increasing the exhaust pressure to a point that the sensor thinks something is wrong). it can even, breifly, set the SES light just like a MAP sensor over pressure.
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Joined: Aug 2004
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From: Racine Wi
Is there any way to tell if the sensor really is bad when we have mods? If the sensor is bad, what bad things does it do to the PCM/controls? I get the same code on my AutoEnginuity software, but haven't worried about it. Truck runs fine, so I was just wondering.
Thanks Jim
Thanks Jim
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Lead Driver
Joined: Oct 2004
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From: Columbia, MO
Well, I ordered the code eliminator from Black Cloud Diesel this afternoon. Super nice guys!!
They indicated to me that this code will defuel the truck, since it thinks it's making too much exhaust pressure. Less fuel=less exhaust. And, he told me of someone who didn't think their truck was running poorly (like me), but when they installed the code eliminator there was a noticeable improvement.
So, I'll keep you all posted as to the difference it makes for me. It will ship from Texas tomorrow to me here in mid Missouri via USPS -- I will hopefully have it by Saturday.
They indicated to me that this code will defuel the truck, since it thinks it's making too much exhaust pressure. Less fuel=less exhaust. And, he told me of someone who didn't think their truck was running poorly (like me), but when they installed the code eliminator there was a noticeable improvement.
So, I'll keep you all posted as to the difference it makes for me. It will ship from Texas tomorrow to me here in mid Missouri via USPS -- I will hopefully have it by Saturday.
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From: Elverson, PA
Originally Posted by jtharvey
They indicated to me that this code will defuel the truck, since it thinks it's making too much exhaust pressure.
ALSO - be aware that I THINK I read somewhere that... that sensor is how the PCM knows when to open the EBPV (like if you would get on it hard, but before the truck is warmed up enough for it to shut of on it's own) So you may have an issue with that - if your EBV is still operational in stock form!! Keep an eye on your Pyrometer - if you run it hard and the EBPV doesn't open like it should - EGT's go up REAL quick!
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Lead Driver
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From: Columbia, MO
Thanks cat_man. I hadn't thought about that one. I'm assuming that the new part will send the signal at all times that everything is working properly. And, I also assume that since the computer is getting the signal that everything is in working order, the EBV will operate as normal. But, you know what they say. Assumption is the mother of all f-ups. I guess I'll find out!!
At least it's winter time now, so if the EBV doesn't close to help the truck warm up, I'll be able to tell.
At least it's winter time now, so if the EBV doesn't close to help the truck warm up, I'll be able to tell.
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From: Elverson, PA
It's my understanding that to shut the EBPV off under hard acceleration - the PCM needs to see a certain amount on back pressure from that sensor - and now with that new fooler sensor in place - the PCM will NOT see that high value that would normally shut the EBPV off
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Lead Driver
Joined: Oct 2004
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From: Columbia, MO
So, basically, I shouldn't have to worry about it once the truck is warmed up -- given that the EBPV is working properly. That shouldn't be a problem. I'm pretty easy on the engine until it reaches operating temp anyhow. But, I'll keep an eye on the EGT's just in case. As if I didn't anyway. 
That's the one thing I watch most of all, other than where I'm going of course.
That's the one thing I watch most of all, other than where I'm going of course.
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From: colorado
Originally Posted by CAT_man_963
Yep - I have heard the same thing - it can defuel just like an overboost code that you'd set with the MAP sensor!!
ALSO - be aware that I THINK I read somewhere that... that sensor is how the PCM knows when to open the EBPV (like if you would get on it hard, but before the truck is warmed up enough for it to shut of on it's own) So you may have an issue with that - if your EBV is still operational in stock form!! Keep an eye on your Pyrometer - if you run it hard and the EBPV doesn't open like it should - EGT's go up REAL quick!
ALSO - be aware that I THINK I read somewhere that... that sensor is how the PCM knows when to open the EBPV (like if you would get on it hard, but before the truck is warmed up enough for it to shut of on it's own) So you may have an issue with that - if your EBV is still operational in stock form!! Keep an eye on your Pyrometer - if you run it hard and the EBPV doesn't open like it should - EGT's go up REAL quick!
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Joined: Jul 2005
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From: North Carolina
I don't believe the EBP sensor code eliminator harness are intended to be used with a functioning EBP valve. I think they are for if the EBP valve has been disconnected. Please check with the supplier.
There are 3 sensors involved with the EBP valve operation. The AIT (air intake temp)sensor is used to prevent the EBPV from closing in warm weather (above 37*F). The EOT (engine oil temp) sensor is used to open the EBPV when the engine oil has reached 140*F or to prevent the EBPV from closing on a already warm engine. The EBP sensor is used to monitor exhaust manifold pressure (pre-turbo) and open the EBPV if the exhaust manifold pressure increases beyond a certain psi. Example, you press the accelerator pedal, increases fuel input, increases exhaust manifold pressure.
There are 3 sensors involved with the EBP valve operation. The AIT (air intake temp)sensor is used to prevent the EBPV from closing in warm weather (above 37*F). The EOT (engine oil temp) sensor is used to open the EBPV when the engine oil has reached 140*F or to prevent the EBPV from closing on a already warm engine. The EBP sensor is used to monitor exhaust manifold pressure (pre-turbo) and open the EBPV if the exhaust manifold pressure increases beyond a certain psi. Example, you press the accelerator pedal, increases fuel input, increases exhaust manifold pressure.