Question about 1997 Toyota Camry

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Insufficient air flow The EGR valve has been changed twice, but the engine light (401 code, EGR) stills come on what else could this be?

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There's a solenoid under the intake manifold which has vacuum hose connects to egr valve. this solenoid is having a lot of problem.

Posted on May 27, 2010

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Egr PO401


Code 401 is for low EGR air flow. The EGR valve allows exhaust gas to be recirculated back thru the intake and reburned.
The problem could be the EGR valve, the sensor, or a blocked line.

Jun 29, 2013 | Dodge Ram 1500 Cars & Trucks

1 Answer

EGR FLOW INSUFFICIENT


On your EGR tube you have two hoses coming off of it. If you put them on in reverse you will get a code of insufficient flow. I put headers on and replaced EGR tube and valve and the flow sensor and that's the code that I received switched the hoses and solved the code

Feb 26, 2013 | 2000 Ford Expedition

1 Answer

Respone to check light engine is Po401


Code 401 is for EGR flow insufficient.
There is a sensor that measures how much exhaust gas goes thru the EGR valve. The sensor could have failed, or the EGR valve may not be working. The sensor and valve would need to be tested.

Dec 11, 2012 | 2006 Kia Optima

1 Answer

P 0401 code "Insufficient Airflow" STILL!! 1996


the exhaust path there must be clear
end to end, its NOT air that is EGR fail for exh. flow, for EGR only.
which engine, ?????
no 2 engines made use the same flow.
so..........????????

Mar 20, 2017 | 1996 Isuzu Trooper

1 Answer

Have a 401 code have changed all emission parts and cleaned throttle body any solution


Engine size? year? This code is for insufficient egr, usually caused by clogged egr passeges or a bad DPFE sensor. Open egr valve, if the engine idles real rough or stalls, replace the DPFE sensor. If the idle does not change, then take the egr valve off and clean the passages. You cant just keep changing parts hoping you get lucky and change the correct one.

May 24, 2010 | Ford F-150 Cars & Trucks

2 Answers

I have a OBD II Trouble Code PO401


PO-401
EGR Flow Insufficient Detected

May 15, 2010 | 1999 Chevrolet Lumina

3 Answers

Code P0401 EGR Insufficient Air flow detected - 2000 Toyota camry


how I change the EGR valve assist switch for toyota camry 2000

Jul 29, 2009 | 1996 Toyota Camry

2 Answers

2002 Crown Victoria check engine light stays on


also have them change the oxygen sensors, if it's deemed necessary. have someone reset the computer. if the light stays off, then you don't have to.

Jun 14, 2009 | 2002 Ford Crown Victoria

1 Answer

Trouble code 401


P0401 is: Exhaust Gas Recirculation Flow Insufficient Detected

The pipes are supposed to have pressure in them when the EGR valve is open, but sometimes, with the EGR closed may have vacuum... the DPFE compares the pressure/vacuum values from the 2 pipes (these 2 pipes take their pressure before and after an orifice) and knows how much recirculated exhaust gases go through the engine...

Your problem definitely sounds like an EGR problem, but it could be the EGR valve, the DPFE sensor, a clogged hose, a leak/clog somewhere in the EGR piping...

The code basically means your engine either is not getting the amount of burned exhaust gases it should back in the intake to lower NOx emissions or the DPFE sensor thinks your engine is not getting enough burned exhaust gases...

May 07, 2009 | 2000 Mercury Sable

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