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I took off the gas cap and then screwed it back on, then cleared the code. So far it worked, but I am not sure for how long. The weather has been so retarded I wonder if that has anything to do with maybe some excess fuel vapor or moisture?
 
Discussion starter · #22 · (Edited)
I took off the gas cap and then screwed it back on, then cleared the code. So far it worked, but I am not sure for how long. The weather has been so retarded I wonder if that has anything to do with maybe some excess fuel vapor or moisture?
I found that you have to drive around for about an hour before it will light back up...
 
Discussion starter · #25 ·
Code Free Again

Forgot to post the resolution on this. The stealership did a smoke test, then replaced the leaking EVAP Canister cost $191, as well as the Vent Control Valve cost $90 which was stuck, labor was $130, and tax was $15. Total damage to the wallet = $441.

Do not make an assumption that this is always the fix for this code as it could be a number of different components that are faulty; smoke test tells the story.
 
Did the shop install the filter kit described in the TSB which presumably will prevent or at least delay "dirt" from getting to the valve. It looks like the filter could be easily replaced if it became clogged. Can't image that happening again soon with how careful you are about keeping your rig away from deep mud and high water.

Your advice about not assuming that this fix will work for similar symptoms should be repeated more often. Proper diagnosis should always precede parts replacement. Good to hear the problem is resolved, even if your wallet is lighter.

Jeff
 
Discussion starter · #31 ·
Bullsh!t codes kickin my @ss

This week the infamous "check engine soon" light came back on.

Took LA RANA into my buddy's shop for code diagnosis, and we have three.

Imediate thought = WTF!!! :angry5:

P0455 EVAP System Leak (large) - hmm that sounds familiar, looks like they didn't fix it afterall...
P0174 Fuel System Too Lean
P0300 Random Cylinder Misfire

This is the last thing I need right now! The NOAS run is 2 weeks away, and I'm not going on a 8 hour road trip (each way) without everything being 100%. Plus we have a vacation overseas coming up soon that I'm scraping cash for.

Guess were off to the stealership again on Monday to grab the ankles.
 
I wouldn't be surprised if the Evap Valve may be causing the other error codes. If there is too much air entering the intake the ECU may not be able to compensate, PO174. That would cause a lean condition that could in turn trigger a a lean misfire, PO300. That all of these codes appeared after service, when only 0455 was there before, is suspicious. I'd focus on the EVAP valve first and see if that doesn't fix all problems.

Jeff
 
i would remove carbon canister and weigh it/ then clean purge valve.. and put some gasket seal on the valve just to keep it air tight.../ remove the only big hose from canister (breather hose ) that attaches to the inside of the frame and clean hose/ inside of frame ....

if the valve spring got stuck from tiny rocks/then it would throw the running rich code..
 
best case scenario, evap valve causing you to run lean & causing the fuel ratio to burn hot (it gets hotter the more air you have) and thus you get a misfire when it burns during compression.

worse case scenario, primary cats are damaged & clogging, causing misfire (personal experience from this). keep us posted, personal interest in this one as i have an evap code that i'm pretty much ignoring untill i can pay for a valve (P0443) & i'd like to know how the evap is effecting the rest of the truck
 
Discussion starter · #40 · (Edited)
It's Back...aka Code Hell

Well as you may remember this ordeal started with a lovely amber "check engine soon" light. I take it to my buddy and it registered one code one code.
1. P0455 EVAP System Leak (large)

So I took it in to the Nissan dealer and spent $441 to replace the Evap Canister and Vent Control valve...they said it passed the smoke test after that and no codes registered. Well that last all of four days until the lovely amber "check engine soon" light appeared again.

So I take it to my buddy and his Snap-On code reader registered 3 codes.
1. P0455 EVAP System Leak (large) - sounds familiar
2. P0174 Fuel System Too Lean
3. P0300 Random Cylinder Misfire

I didn't have time to take it in immediately, so a day passed and then the friggin amber light started friggin flashing for about a minute (on two occasions) which means a higher level of urgency warning, and felt real sluggish plus it vibrated all funky like. So back it goes to the stealership, and they claimed they cleared all codes and P0455 did not return, they also smoke tested it again for leaks and they're sure that there is no issue there. But, the nasty bitch was still throwing three codes.
1. P0300 Random Cylinder Misfire
2. P0306 Cylinder #6 Misfire
3. P0605 ECM Engine Control something...
So the stealership checked everything for a vacuume leak, but it suposedly has none. They then replaced the #6 cylinder coil, and cleared the code, resulting in the wallet suffering another $178 hit.

I test drove it with the service manager (who I've known for years since my Dad and I designed the place) and it drove perfectly. So next morning I start it up to go to work, drive to the light at the top of my street and guess what...yep the lovely amber "check engine soon" light. :angry5:

So today I drove it back to my buddy's shop again, and his Snap-On code reader listed a new code.
1. P1283 AF Sensor 1 (B2=Bank 2)

So currently LA RANA is sitting at the stealership awaiting a Monday morning diagnosis, and my wallet is awaiting to be raped again...I've already spent $620 :cussing:

Edit: changed title of this thread to reflect the situation.
 
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