Question about 2000 Saab 9-3 Viggen

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P0400 please help me ,what should i do?

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If the EGR is actived by vacum, check the hose (may be craked) clean EGR and around,check solenoid after delete def.cod.
if is electronically actuated ,take out plastic cover clean actuater mecanism and the shaft also.delete def.cods(you can actived the EGR with diagnostic tool to see if is OK)clean air pressure sensor also!
check turbulence sistem if the problem remains!

Posted on Sep 24, 2008

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P0400 Exhaust Gas Recirculation Flow Malfunction

Post more information on your vehicle, and the symptons which lead to the fault.

Strictly Saab
Melbourne, FL

Posted on Sep 16, 2008


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99 maxima ran till it was parked now it turns over will not start gave code p0400 any ideas

The fault is somewhere around the EGR valve - probably the EGR valve or the throttle position sensor.

Before replacing any sensors try removing and cleaning the EGR.

Here's a Youtube link that may be of help to you:

1999 maxima egr Google Search

This link explains about the EGR:
P0400 Exhaust Gas Recirculation Flow Malfunction

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1 Answer

2000 Nissan xtrra v6 3.3L SE. What is/are the probable cause(s) of a DTC P0400?

Hi William,
On 2000 & some earlier Nissans this problem is very common.
Here is a link to web page that should be helpful to you.
Good Luck JP
P0400 Exhaust Gas Recirculation Flow Malfunction

Jun 22, 2015 | Nissan Cars & Trucks

1 Answer

I'm getting P0400 and P0235 on Renault Logan

P0400 Exhaust Gas Recirculation Flow Malfunction
P0235 Turbocharger Supercharger Boost Sensor Circuit Malfunction

I would say the EGR Valve is faulty- stuck open. I think the second code ( P0235) is being generated due to the EGR problem.

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1 Answer

Mercedes benz e 320 1998 model engine light code p0400

code p0400 refers to exhaust gas recirculation(EGR) system---flow malfunction.===causes---hose leak/blockage--basic setting not carried out (if applicable)---wiring---EGR valve ---EGR solenoid---ECM
check out the valve and solenoid.

Apr 29, 2014 | 2005 Mercedes-Benz Mercedes Benz E320 Cdi

2 Answers

Trouble shooting code

EGR malfunction. Check the vacuum hose to the EGR valve first.

Mar 25, 2014 | 1995 Volvo 850

1 Answer

Code P0400 on 99 nissan altima

Hi Kristy,here's a link to your P0400 code.

Apr 08, 2013 | 1999 Nissan Altima

2 Answers

P0400 code engine runs rough at idle

P0400 Exhaust Gas Recirculation Flow Malfunction

The last time I had this, i just took it apart and cleaned it. Worked great. Hope it helps. ,,,, right behind the air intake before the throttle, take that thing apart and clean out the carbon.

Aug 13, 2010 | 1997 Nissan Pickup

2 Answers

Check engine light comes on,now is staying on.Code reads P0400.I have been told what the code means but need it narrowed down;I do have a leak in my gas tank on top.Should this be the problem.Just wanted...

the code p0400 is not a fuel leak but a lack of the fuel tank to hold a vaccum. it is possibly one of three things : abad cap :a bad evap solenoid : a bad canister dump valve. most of these would need to be check by a tech to determin which one.
the ets is usualy an abs problem with the lite on it should turn the abs off

Nov 21, 2009 | 1997 Pontiac Grand Am

2 Answers

Truble code p0400

the passage that causes this low flow is in the intake, it gets full of carbon and gunk, try running a wire through it, also make sure the EGR passes a functional test.

Dec 15, 2008 | 2000 Mazda 626

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