Question about 1995 Volvo 850

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Trouble shooting code

Obd2 code p0400

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

Posted on Apr 15, 2015


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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

CEL code P0400 EGR Flow Malfunction

Mar 27, 2016 | Cars & Trucks

1 Answer

Code P0400

p0400 ,is EGR monitor failure. OBD2 tech.
the ECU does 2 tests, each driving cycle.
yours fails,
the EGR on suz are a 50k service check, didn't clean it yet?

Oct 25, 2013 | 2006 Suzuki Verona

1 Answer

Need help trouble shooting 2 codes, P0401 & P0455

Google the codes

Lots to read & study

OBD2 PO401

OBD2 PO455

Think you will a repair shop to smoke the
Evap for the 455

Feb 14, 2013 | 2000 Mercury Mountaineer

1 Answer

Trouble shooting code p0422

P0422--Main Catalyst Efficiency Below Threshold (Bank 1)

Worn out Exhaust Converter

They need to be replaced at 12 to 14 years,
even if they pass inspection,at that point they
no longer are doing much

You can get any codes you want by using google
& entering OBD2 Codes & your codes & can include
your veh & year in case you get euro,asian or domestic
conflict on a code

Nov 17, 2012 | 1996 Audi A6

1 Answer

Po400 code

P0400 code is for EGR(engine gas recirculated) flow malfunction.
need to clean EGR canister.

May 02, 2012 | 1998 Nissan Frontier

2 Answers

97 oldsmobile sihouette error code p0400. Was told by Advance auto it was a bad egr canister solenoid. Replaced it but still have check engine light on. How do I get it off?

After you have made the repairs go back to Advance Auto and have them remove this stored trouble code .Most places will remove them from your computer for free.

Dec 06, 2010 | 1997 Oldsmobile Silhouette

1 Answer

Check Engine light flashes when accelerating or going into passing gear.

Well the check engine light flashes as part of your OBD2 technology that in the vehicle what you do if you can is count the number of times it flashes, that number is what technicians refer to is the manual trouble shooting code tells them without having to hook up a scanner what system or part is going wrong in the vehicle. if it flashes when you put it into passing gear it could have something to do with your tranny or possibly even your gear box. if you have the code number you can usually look it up online by going to entering the year of your vehicle followed by OBD2 trouble code number "then insert the number of times it flashed before going off completely"

May 10, 2010 | 2006 GMC Sierra

1 Answer

Can you direct me to Chevy Lumina 1998 engine codes list for trouble shooting the car.

Post the codes here and we can help you define them, or paste this link into your browser window and bookmark the page - it's an OBD2 (1996 and newer) fault code list that you can use to look up the codes:

Just click on the brand you're concerned with, and have at it:)

Nov 19, 2009 | 1998 Chevrolet Lumina

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

1 Answer

Trouble shooting car

this is an OBD2 car and you will need a scan tool to find your code
there are many auto parts stores that will do it for free

Nov 12, 2008 | 2002 Kia Optima

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