P0400?
Thread Starter
|
Junior Member
Joined: Apr 2007
Posts: 21
Likes: 0
From:
P0400?
I had a check engine light, so I went to the local Auto Zone and the code was a P0400, Evap emissions, so I then went to a Volvo repair place and they told me it had something to do with a relay that is up front near the radiator. I found the area they were referring to but not sure where to go from there. Any Help? I have a '95 with the OBDII. The light is bugging me Thanks, Ward
Administrator
Joined: Mar 2009
Posts: 15,736
Likes: 36
From: Albuquerque, NM
If you have a '95, you also have the OBD-I ports near the ECU container and can pull and reset codes yourself. As for the code, it can be a simple vacuum leak or the little valve up there, maybe the purge valve. That usually tosses a P0444 code. Make sure you close your gas cap good and maybe even replace the seal on the cap.
Administrator
Joined: Mar 2009
Posts: 15,736
Likes: 36
From: Albuquerque, NM
The gas cap seal from the dealer is probably a $3 part.
Administrator
Joined: Mar 2009
Posts: 15,736
Likes: 36
From: Albuquerque, NM
Administrator
Joined: Mar 2009
Posts: 15,736
Likes: 36
From: Albuquerque, NM
Code 3-1-5 (EVAP System)
1) Check for other codes. If Code 5-4-1 is also present, check that code first. If Code 5-4-1 is not present, go to next step.
2) Start and run engine at idle. Remove vacuum hose between EVAP valve and intake manifold. If vacuum is present in hose, go to next step. If vacuum is not present in hose, check for obstruction. Also check hose connection to intake manifold.
3) Start and run engine at idle. Connect hose between EVAP valve and intake manifold to EVAP valve. Remove hose between EVAP valve and canister from EVAP valve. If there is no vacuum in EVAP valve when valve is not activated, go to next step. If there is vacuum, retest using new EVAP valve.
4) Start and run engine at idle. Disconnect hose between EVAP valve and canister at EVAP valve. Check if there is vacuum in EVAP valve when valve is activated. If there is vacuum, go to next step. If there is no vacuum, retest using new EVAP valve.
5) Start and run engine at idle. Connect vacuum hose between EVAP valve and canister to EVAP valve. Remove vacuum hose between EVAP valve and canister from canister. Check if there is vacuum in hose when EVAP valve is activated. If there is vacuum, check if all canister inlets and outlets are okay. Repair as necessary. If inlets and outlets are okay, fault is intermittent. Go to next step. If no vacuum is present, check for obstruction in hose between EVAP valve and canister.
6) Check hose between EVAP valve and intake manifold, and between EVAP valve and canister for an obstruction. Check canister connections to ensure they are not clogged. Check EVAP valve for dirt or deposits. Repair as necessary. If no faults can be found, test system using new EVAP valve.
4) Start and run engine at idle. Disconnect hose between EVAP valve and canister at EVAP valve. Check if there is vacuum in EVAP valve when valve is activated. If there is vacuum, go to next step. If there is no vacuum, retest using new EVAP valve.
5) Start and run engine at idle. Connect vacuum hose between EVAP valve and canister to EVAP valve. Remove vacuum hose between EVAP valve and canister from canister. Check if there is vacuum in hose when EVAP valve is activated. If there is vacuum, check if all canister inlets and outlets are okay. Repair as necessary. If inlets and outlets are okay, fault is intermittent. Go to next step. If no vacuum is present, check for obstruction in hose between EVAP valve and canister.
6) Check hose between EVAP valve and intake manifold, and between EVAP valve and canister for an obstruction. Check canister connections to ensure they are not clogged. Check EVAP valve for dirt or deposits. Repair as necessary. If no faults can be found, test system using new EVAP valve.
Last edited by rspi; Oct 31, 2011 at 12:27 PM. Reason: addition
Thread
Thread Starter
Forum
Replies
Last Post
