MaximaMan77

I found out what the code is for my SEL but I can't find out what it's for. The DTC is P1456. Codes in the low 1400's are all EGR. By reading the number I know it's: P=powertrain,1=Manufacturer, 4=Aux. emission Control & 56=?
Anyone know what this code is for? This is the 2nd. time I've had this code. The 1st. time was in May and we cleared it. This time it came on 7/30 I was doing 45mph at 730rpm according to the ECU. So I was coasting at the time.
Looks like the stock air box is going back in and off to the dealer I go

mdeal

iTrader: (2)

In looking at standard DTC codes, that one is not listed. It is probably Nissan specific, which means probably only the dealer will tell you what it is since Nissan doesn't like to share their OBD information.

makeHerPurr

as stated by previous post. This is ref. from 2001 ESM.

Y2K2Driver

iTrader: (1)

According to the ESM, DTC P1456 and P0456 are similiar, if not the same, and deal with the fuel system. There is lot there so I uploaded the pages as a pdf to my web space. Hope it helps.

http://mywebpages.comcast.net/mpillmeier/DTC P0456-P1456.pdf

MaximaMan77

Thanks for your help. But your link isn't working.

Y2K2Driver

iTrader: (1)

Highlight the entire portion and paste it into the URL space for your browser. The link was parsed incorrectly because of a space in it and therefore clicking on will not do it.

ajahearn

iTrader: (3)

In the 02 ESM it has this down for the brief descriptions of what is wrong. For 1456/0456

Evaporative emission control system very
small leak (negative pressure check)
I EVAP system has a very small leak.
I EVAP system does not operate properly.
I Incorrect fuel tank vacuum relief valve
I Incorrect fuel filler cap used
I Fuel filler cap remains open or fails to close.
I Foreign matter caught in fuel filler cap
I Leak is in line between intake manifold
and EVAP canister purge volume control solenoid valve.
I Foreign matter caught in EVAP canister
vent control valve
I EVAP canister or fuel tank leaks
I EVAP purge line (Pipe and rubber tube) leaks
I EVAP purge line rubber tube bent
I Blocked or bent rubber tube to EVAP
control system pressure sensor
I Loose or disconnected rubber tube
I EVAP canister vent control valve and
the circuit
I EVAP canister purge volume control
solenoid valve and the circuit
I Absolute pressure sensor
I Fuel tank temperature sensor
I O-ring of EVAP canister vent control
valve is missing or damaged.
I Water separator
I EVAP canister saturated with water
I EVAP control system pressure sensor
I Refueling control valve
I ORVR system leaks
I Fuel level sensor and the circuit
I Foreign matter caught in EVAP canister
purge volume control solenoid
valve

MaximaMan77

Wow this sounds like it's gonna be fun to diagnose. I hope I can get a loner for them it's gonna be there for a while.
Thank you guys very much for the post!
Adam

UMD_MaxSE

iTrader: (1)

is your gas cap on tight? Loose gas cap can cause EVAP system leak....

MaximaMan77

I always thighten the cap until it clicks several times and I know my wife does also. And it hasn't been over filled.

This is the 2nd. time for this code and after clearing it the 1st. time I think this maybe the 1st. time the system has been able to run the test again.