Hoses seem to be in-tact, one is a bit off, and needs to be placed further...its the lil u shaped one at back that could use some more push...but this seems to be gushing under the middle of car...and now have P1105 press switch solenoid valve.

any help is appreciated...I already assume I have to re-do project...phuggin-ay

 

did you remove your valve covers? the 1105 is the map sensor i know. Did you remove any coolant hoses?

 

^ No, the P1050 is the MAP sensor aka Boost Sensor. The P1105 is the MAP solenoid.

I've just had both these codes a week ago.

 

The way I've got rid of the code P1105 was:

1) Disconnect the battery (neg), reattach the hoses on the solenoid valve then reconnected the battery.

2) Start the car, but the damn light was still on.

3) Got my DTC scanner and erased the code then PUFF the CEL went away.

 

Yes, did valve covers, and now this is happening..pretty much sure I got all the hoses back on tho

neo-Yeah, I cleared my codes...but the car is obv not operational to see if it stays gone...but good info...

 

IIRC, the EGR valve has coolant hoses attached to it that have to be removed when you take the UIM off. Maybe this is your leak.

 

This is it. You forgot to replug or hose clamp the coolant hoses for the EGR passage on the back of the Upper Intake Manifold, or maybe even the Throttle Body!

 

you are correct, my bad the P1105 is the solenoid however I don't see a P1050 at all in my manual

 

Can someone hip me to where the solenoid is? Code on again after i cleared it and am up and running....and unfort my manual was doused in rushing coolant, lol, no joke....kinda ironic tho.

Prob was, my bro did not attch lower hose under iac, easy mistake, and very easy fix compared to what i fig'd i'd have to do

 

The map/baro solenoid is by the throttle. Start by looking at where the cables attach to the throttle and then look towards the front of the car about 4 or 5 inches. It is lower than the throttle. It has 2 vacuum lines coming up at the front and a wire harness connector on the top surface. Coming out the back end is a 3rd vacuum line that plugs on to the throttle body.

When I did my valve cover gaskets, I forgot to plug the 3rd vacuum line back onto the throttle body and got a CEL.

 

Are you sure it's not by the front valve cover? Or is that the sensors location

 

If you have an auto, it is located right next to the tranny dipstick. It should be a brown solenoid with a vacuum hose going from it to the actual sensor.

 

All the hoses seem to be in-tact, sensors are connected...so, I am confused...I did not have this code before I redid the valve covers...?

I had a low catalyst bank 1 code before...but this p1105 seems to keep coming back...any good ideas?

 

Perhaps you've damaged the solenoid during the removal process?

Try swapping it with another solenoid.

 

Yeah, maybe...thing I am concerned about is, I didnt actually remove it to do the job...may have got dinged or moved or something...unsure...another solenoid looks like its pretty spendy....?

 

I've pulled a one off recently from a junk yard as I was having the same code, they charged me $30 for it.

Courtesy Nissan has it listed for http://www.courtesyparts.com/14956vb...-p-130363.html

and the other solenoid http://www.courtesyparts.com/14956va...-p-130362.html

 

It may seem like a waste of money but if you try the swap, it's one thing you can rule out that is or is not the problem.

 

Thats true, and thx for other input on thread...check back, i will fig something out over next few.

 

maybe you split or damaged a vacuum hose somewhere that runs to the solenoid? youd have to look on the underside of the hood for a vacuum diagram tho. (i dont recall if the map solenoids are on there tho). theres so many dang hoses around there and on the vacuum gallery that could have gotten disconnected or whatever while removing the intake manifold.

 

So, short of changing out solenoid, all hoses seem to be fine, and the PO402 low catlyst bank 1 code is back....could this be triggering something with boos/map solenoid?

The evap emmis codes are gone, but it seems like others just pop right up in the others place, ftl!

I am looking for a suitabke replacement, only issue I am noticing is some stumbling on idle, and hovering like its gonna die, but it never does?

 

The P0402 is the EGRC-BPT valve malfunction. According to the FSM it states the following (which is just like how you described it): If too much EGR flow exists due to an EGRC-BPT malfunction, off idle engine roughness will increase. If the roughness is excessive, then the vacuum to the EGR valve is interrupted through the EGR solenoid valve. If the engine roughness is reduced at that time, the EGRC-BPT valve malfunction is indicated (P0402).

Take a look at pages 220 - 223 http://www.nicoclub.com/FSM/maxima/1997/EC.pdf

 

Hold on, did you mean P0402 or P0420?

P0402 = EGRC - BPT

P0420 = Three way catalyst

 

I will doible check when i am not mobile, think it was 402 tho, bc it stated low catalyst bank 1

 

Where are you looking up the codes from?

 

The P0402 has nothing to do with catalysts.

 

Po420, youd think the 420 wouldve been easier to remember, lol.

I have an obd2 scanner.

 

check the following on page 268 - 271.

http://www.nicoclub.com/FSM/maxima/1998/EC.pdf

Never had this code before. I gotta do some more research.

 

Thx btw, i have been looking into this on those pages the other day as well....So here is my thoughts, i had the egr/evap/emissions code previously blanking on number now...given the directions, i feel that the evap above coil 5 is prob in need of replacing as well, unsure if this will clear codes, but its a start. I may also have a line on a cheap solenoid replacement, which would then poss clear that up too as we talked about.
The kicker here is, the only hose questionable from install was tear in small,thin hose that connects to the airbox? Taped it, but its a barely fix...could this be the problem out of all of this!?

I hate trouble shooting electrical and vacuum ish! Give me gears,fluids&valves, I f'n hate the hoses and electrical work.

As a side note, they mention exhaust, but just did warpspeed y,highflow magna cat and monza system....so despite a potential bad 02 sensor,i do not see where or how the exhaust work could affect this.

My main sense here is that evap flow sens above cyl 5 started and will hopefully end all of this!