Question about 2005 Nissan Xterra

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Dtc po328 and po442 - 2005 Nissan Xterra

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The P0328 is a knock sensor code. Most likely cause is the knock sensor itself. But it is possible that the wiring harness has a short in it. Replace knock sensor.

The P0442 is an EVAP small leak code. This one can be more tricky as there are a ton of things that can cuase this code. First thing to try is hte gas cap. Even though it is a small leak code and not a gross leak code, the cap can still be the cause of the fault. Also a Nissan fuel cap is all that should be used. No Stant or other aftermarket caps. Thay can give you trouble. If the problem is still present and you are sure the cap is properly sealing. You really need to go to a shop that can "Smoke" the system to find the source of the leak. This is not something all shops can do and the at home shade tree mechanic can't either unless they have the very expensive smoke machine. Basically you are trying to find a source of the slightest little leak in the EVAP system that is locates somewhere between the rear bumper and the front bumper. It's like looking for a needle in a haystack. Having a smoke machine is like looking for that needle but having an cartoon ACME strength industrial electro-magnet to assist you in finding that needle.

Posted on Oct 07, 2010


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Posted on Jan 02, 2017


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Hi have code po496,I just replaced fuel filter and part of the gas line and had to replace part of the line right below that because I had a code po442.What would cause this new code?thank you

DTC P0496
This DTC tests for undesired intake manifold vacuum flow to the evaporative emission (EVAP) system. The control module seals the EVAP system by commanding the EVAP canister purge valve Closed and the EVAP canister vent valve Closed. The control module monitors the fuel tank pressure (FTP) sensor to determine if a vacuum is being drawn on the EVAP system. If vacuum in the EVAP system is more than a predetermined value within a predetermined time, this DTC sets.
EVAP purge solenoid. maybe.

Aug 23, 2017 | Cars & Trucks

1 Answer

How to fix purge valve on 2006 Chevy uplander codes po442 wear to find canister purge valve

Under the hood in the engine compartment .
DTC P0442 Evaporative Emission System Small Leak Detected
Your best bet is to take your vehicle to a qualified repair shop that has the diagnostic equipment to find the leak , not just replace parts .
Your best bet is take

Jul 04, 2016 | Cars & Trucks

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Dtc Code P2314

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What are 2002 Dodge Intrepid trouble codes PO442 and ... > ... > American Cars > Dodge > Dodge Intrepid
What does the Error Code P0846 on 2002 Dodge Intrepid mean? .... Trouble code P2314 means: Ignition coil E, secondary circuit - malfunction Trouble code .

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Htd catalyst

wow, no year, no jeep car stated, hopeless to be accurate... i am...

first rule of OBD2, never use non Jeep information on DTC codes
use Jeeps. (grin!)


Evaporative Emission Control System Leak Detected (medium leak)
EVAP failures
each car makers has there own tests, for EVAP. the exact details very by year. and model car or even country and in USA< FEderal or calif models.
here is the bar stool answer. The FSM covers this in Vivid details.

your gas tank vent is leaking.
first get a new gas cap or get it tight. (use only jeep spec caps!!!!!!!!)
reset the DTC. (scan tool , press RESET)
comes back? well its real. it's really is failing.
do the FSM tests.
you could visually inspect all tank vents.

no year,no joy
no body car, hopeless to post fsm pages.

Jan 26, 2014 | Jeep Cars & Trucks

1 Answer

Oem codes are:po753,po410, to install these parts if possible .thank-you.

before i can answer are you getting this code only? sometimes if multiple transmission dtc`s appear it might be a faulty ignition switch. Have had three trucks in last two weeks that i diagnosed with this problem, but need more info. have you lost all power to the cluster or have had problem starting truck?

Jan 13, 2011 | GMC Jimmy Cars & Trucks

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DTC # 01-PO442 and P1407 are the codes that come up possible solution help

PO-442 EVAP Control System Leak Detected (Small Leak)

You will need to put an EVAP Smoke Machine, on system to find leak

P1407--Should be EGR related.

Most likely need new EGR Valve

May 23, 2010 | 2001 Ford F150 Styleside SuperCrew

2 Answers

Check engine light code PO442

You likely won't notice any drivability problems. P0442 indicates a fuel vapor leak in the EVAP control system. It means a very small leak has been detected. In fact, the leak can be from a hole as small as 0.04" in diameter. 
The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage.
Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.

With a P0442, the most common repair is to Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back. Otherwise, replace the gas cap, or Inspect the EVAP system for cuts/holes in tubes/hoses.

Good luck and hope this helps

May 07, 2009 | 2001 Volvo S60

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