This TSB applies to DTC P0456 found in 2008 Nissan Pathfinder, Maxima, Quest, Frontier and Xterra models, and all 2009 models.

On-board diagnosis of DTC P0456 is sometimes performed and stored when the engine is not running. This is known as Engine Off Natural Vacuum (EONV) diagnosis.

The following freeze frame data is NORMAL when DTC P0456 is stored during EONV diagnosis:

CAL/LD VALUE…………………0%

COOLANT TEMP……………… -40 Fahrenheit

L-FUEL TRM-B1………………. .100%

L-FUEL TRM-B2……………….. 100%

S-FUEL TRM-B1………………. 100%

S-FUEL TRM-B2………………..100%

ENGINE SPEED………………..0 rpm

VEHICLE SPEED……………….0 mph

INT MANI PRES…………………0 psi

ABSOL TH-P/S………………….0.00%

B/FUEL SCHDL………………….0.0 msec

INT/S TEMP SE…………………-56 Fahrenheit

FUEL SYS-B1……………………Mode5

FUEL SYS-B2……………………Mode5

COMBUST CONDITION………...Mode1