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

SOURCE: fuel line replacement 96 LeSabre

My computer just hosed my response so forgive the clutter if half of it posts.

The answer to our problem is GM and AC part # 25625186. It costs $62.10 plus tax but I didn't have the patience to wait & see if the 20 dollar part (no picture - not in stock) from local parts store was correct.

LEAVE KEY OFF to release pressure from fuel line. It is always a good idea to disconnect the battery while working on a car. The hose diconnects on either end by pushing the two tabs on the clear/white fastener hooked to the filter on one side and the hard line on top. Small hands and a screwdriver or pliers may help but the job can be done with (thin gloved) fingers. I take that back... I needed a screwdriver to open the rubber bracket on the frame and help pry the top hose out. Next make sure the clear/white insert fasteners are included with the new part so you can go ahead and rip off the pieces left on the hard lines. Make sure there is no dirt on the hard lines and firmly press the new part in place. There should be a nice SNAP when it is connected on each side. This was an easy one besides the fuel mess and hit to the wallet. Please wear safety glasses and take precautions for dripping fuel and dirty undercarriage.

SOURCE: LOCATION OF FUEL FILTER ON 1999 OLDSMOBILE INTRIGUE

my 98 oldsmobile intrigue keeps reving high them stalls what could be the problem

SOURCE: 2002 dodge caravan wth po442 and po455 error codes

gas cap has no bearing on fuel guage. Sounds like float is broken in tank

SOURCE: 98 chevy 1500 5.7L will crank but won't start. I

Change the EGR valve or clean it prior to changing it with fluid filim...........Hope this helps you out.

ZJ Limited

• 17989 Answers
• Posted on Nov 04, 2010

SOURCE: I HAVE A 2007 GMC

DTC P0496 - Evaporative Emission (EVAP) System Flow During Non-Purge

If the EVAP purge valve does not seal properly, fuel vapors could enter the engine at an undesired timing causing drivability concerns. The control module tests for this by commanding the EVAP purge valve OFF closed and vent valve ON closed, sealing the system, and monitoring the FTP for an increase in vacuum. If the control module detects that Evap system vacuum increases above a calibrated value, DTC P0496 will be set.

This could be a sign that your purge valve is intermittently failing so you might want to get it checked out before it turns into a bigger problem that affects the drivability of your truck.

EVAP is located behind the throttle body, near the front of the engine...



Fig. Front engine compartment view-4.8L, 5.3L, 6.0L and 6.2L engines (1) Throttle Body (2) Manifold Absolute Pressure (MAP) Sensor (3) Evaporative Emission (EVAP) Canister Purge Solenoid Valve (4) Knock Sensor (KS) (5) Engine Block Heater (6) Engine Coolant Temperature (ECT) Sensor (7) Camshaft Position (CMP) Sensor (8) Generator (click for zoom)

The first step would be to simply clean the valve and see if that helps. The purge valve will be an inexpensive part (probably $20.00 or so) so I'd usually just replace it instead of trying to test it to thoroughly. I've found it can be a somewhat tough part to come by a third party dealers (Napa, Autozone, etc.) So you might have to contact your local GMC dealership parts department to buy the part.

The best thing to do would be to ask the person at the repair dept who sells you the part to copy the page with the replacement guidelines from the service manual. You usually won't have any trouble getting them to do this and then you'll have a good written copy to follow while you change the valve.

The other option would be to have a local mechanic do the replacement for you.

Hope helps.