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Discussion Starter · #1 ·
So for about 3 weeks I had my check engine light for P0475 and P0455 codes.

P0455 - EVAP Control Valve

P0475 - Exhaust Pressure Control Valve

So after looking for parts and endless troubleshooting on this. I yanked the EVAP canister out from underneath the car. Cleaned it out with some Alcohol. Let the Alcohol dry up. Tested the canister by hooking it up to a battery. Valve open Voltage check was good. Put the canister back in. Check Engine light was still on.

More thinking thinking and thinking....

Decided to not nuke this whole damn thing and change the simple things that could be throwing these codes.

Need a new Gas cap? No.

Need a new fuel pump? No.

Pressure regulator? No.

etc.

etc.

etc.

Then I came to the conclusion that I was nuking this whole thing. If I was going to change anything first it would be the gas that I put in the car. For a good year and a half I have used 87 that was on Naval Air Station Pensacola and Naval Air Station Jacksonville. So I put STP Fuel system treatment and Cleaner (Grey bottle 7 or 8 bucks at Hess station.) I Put a Tank of Hess 89 octane fuel. Along with that I made sure that there wasn't Ethanol in the fuel. Which apparently there is many horror stories of Ethanol in these cars. Speaking how I was sitting on E (yes the light was on), I put about 10 gallons of gas in her. Pretty much immediately I noticed a dramatic change in the car. I wasn't hearing as much Spark plug ticking as I previous was. It sounded much healthier. So I am guessing that the 87 octane isn't even a choice for Versa's or is Ethanol. Also judging by my fuel filter there must have been a number of contaminates in the fuel I was getting along with water.

But in conclusion my car has never ran better and sometimes when you have a problem with your car it could be the simplest resolution to fix the problem.
 

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Um, what the hell kind of Versa are you driving that can set an Exhaust Pressure Control Valve code?
 

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They don't sell diesel Versa's as far as i know, they sell diesel Tiida's though.
 

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Discussion Starter · #6 ·
The OBDII module blew that code. I was thinking the exact same thing. I just figured it thought it was the 1.6 turbo model because it didn't ask me what subcategory it was. Computers, need I say more.
 

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So for about 3 weeks I had my check engine light for P0475 and P0455 codes.
P0455 - EVAP Control Valve
P0475 - Exhaust Pressure Control Valve.
I have a P0455 code as well, had it for several months.
When I sought the code, I found Gross Evap Leak.
I wouldn't be surprised if I will be replacing one or both of these valves for emissions test this spring.
Be sure to post your findings, and welcome to the NVF Kevan :grin
 

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Discussion Starter · #8 ·
I followed this video pretty much. To make it simple. Test if against your car battery. Grab 2 shop rags, a bottle of alcohol, a scribe, small flathead (to get the gunk out of the spring). Cover the holes with the rag. poor some alcohol in. Shake it up. Repeat until you are satisfied. Wait until the alcohol is dried before putting the shit canister back in. Also before even pulling it out check to make sure everything is hooked up correctly. Hoses and the sensor isn't hanging. According to the Nissan Dealer, the EVAP canister just hanging in the unlock position is pretty common. https://www.youtube.com/watch?v=Uqn5hAz_XKE
 
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