Question about 1996 Toyota Paseo

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L am trying to pass an emissions test for a 1996 toyota paseo,trouble code po401. l have already replaced the egr valve (oem new),however,the rings were stripped and l used high heat electrical tape to secure it,allowing me to pass the test 3 months ago.l have also cleaned the oxygen sensor and system. l do not know where the DPEF or MAF is located and l want to know how to home test for air leaks. Any other suggestions would be much appreciated since recent illness limits my income severely. thank you

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Posted on Jan 02, 2017

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SOURCE: 1995 Toyota Camry - Code 71 - failed emissions tests

replace the EGR switching valve and have the machanic clear the engine check light. I think it should help

Posted on Mar 31, 2009

  • 14 Answers

SOURCE: Code P0401 toyota Camry 3.0 v6

replace the vsv that has the vacuuum hose running from it to the egr valve

Posted on Jun 05, 2009

  • 78010 Answers

SOURCE: 1988 Ford F150 running rich, can't pass emissions.

has the cat been replaced? worn out cats cause high HC emissions

Posted on Aug 09, 2009

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SOURCE: i have a Nissan altima 96' and it doesn't pass

drive the car 500 miles and take it back

Posted on Sep 29, 2009

  • 2359 Answers

SOURCE: po401 and po420 (95 toyota previa Van super charged engine)

Check for air leak into system after MAF.

Check for

vacuum leaks on intake manifold,

the air tube between the air filter.

intake manifold vacuum hose.

clean throttle plate with Berryman carburator cleaner

SEE sample picture HERE

Check for loose or no connected vacuum hose(s).

Take it for a test drive.

Please rate my answer if it's useful to you.



Posted on Dec 19, 2009

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1 Answer

Toyota troubleshooting code PO401

Try to clean,it is EGR valve.Tubing too.

Jun 18, 2013 | Toyota Camry Cars & Trucks

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96 cutlass supreme will not pass emission in ut. what should I do? KOER failed, trouble code po401

cleanout egr valve and troutle body . Or replace egr with new one, clean, check vacumm lines , check for clogged check , depending on modle of car you can pippoint problem as some have a common part problem depeding with make of car. But all have to do with exaust system. Insufficient flow exaust flow. Im not an expert, all I know it is related to this, I have it myself so im googling it.

Ford EGR valve

The OBDII fault code P0401 means that the engine computer has detected that the Exhaust Gas Recirculation (EGR) system flow is insufficient. Read more how the EGR system works below. What could cause the code P0401 - clogged or restricted EGR passages
- faulty EGR valve
- EGR valve stuck closed
- problems with the DPFE sensor (Ford)
- problems with hoses to the DPFE sensor (Ford)
- problem with the EGR vacuum switching valve (Toyota)
- clogged catalytic converter
- carboned up EGR temperature sensor
- vacuum supply issues at the vacuum-operated EGR valve
- electrical problems with the EGR valve control circuit
- engine computer problems
helpful website helps you with pinpoint and sou;ution related to auto make and model shows you most common cause of code reading.

Apr 16, 2013 | Cars & Trucks

3 Answers

A diagnostic report indicated a PO401 error?. The mechanic advised replacement of EGR bulb. Does it affect the performance of the engine if not changed?I live in mississauga ON Canada.

I don't know about the EGR bulb, but the EGR Valve should be replaced or the EGR Valve taken out, and the orifice it sits in cleaned out with carburetor cleaner in order to get the flow back up once a new or old EGR Valve is put back in.

Carbon builds up in the space, causing a lack of Exhaust Gas Recirculation to occur.

It should not affect performance, but might affect emissions due to exhaust gases not reducing combustion temperature and not reducing the NOx output of the engine.

If you have an emissions inspection program in your area required by law, it would fail the inspection if the code comes up. That's for the U.S. on a state by state, and region by region basis. I don't know about Canada's laws.

Jan 19, 2011 | Toyota Camry Cars & Trucks

1 Answer

Oseneck99 toyota camery got a po401 code i replaced egr valve and egr pressure sensor. now i have codes po441 po446 please help.

Recheck all the vacuum lines near the EGR solenoid. The new codes are for the EVAP emissions system. they are codes for incorrect purge flow. You may have left a vacuum line of, switched a couple of lines or forgot to plug something back in.

Sep 30, 2010 | 1999 Toyota Camry

4 Answers

Emission inspection report list a code 401 as the problem.where should i start to correct the problem

Check for

vacuum leaks on intake manifold,

the air tube between the air filter.

intake manifold vacuum hose.

clean throttle plate with Berryman carburator cleaner

SEE sample picture HERE

Also remove carbon built up behind the EGR valve and the EGR passage tube.


Vacuum leak WILL offset the intended 14.7 to 1 air fuel ratio.

More un-metered air (leaks) will lean out the fuel mixture.

Use small amount of Berryman carb clearer at potential air leak area will help you identify trouble spot.

At idle,just spray and listen for the RPM surge.

The in-rush of carb clearer will increase the RPM on the motor.

Record the problem spot(s) and address it later.


EGR carbon built up require 2+ hours to clean from start to finish.

You will need a new EGR base gasket before your start.

Locate and remove the EGR valve after the vehicle is cool down.

Carefully record the connector and vacuum line (for older vehicle) location by drawing an easily to follow diagram.

Remove the EGR valve.

Inspect the location of the carbon built-up inside the valve and the EGR passage tube.

SOAK these areas with WD-40 spary.

You will need a small screwdriver,cloth hanger and lot of newspaper and time to get this cleaning done right.

RE-SOAK the carbon and let it sit for over-night will also help.

One the last round,pass a shop vacuum of the EGR valve and the passage pipe.

Install the new EGR gasket and connectors.

Allow the vehicle to warm up outdoor to burn up any remaining WD-40.

Take it for a test drive.

Please rate my answer if it's useful to you.



Sep 24, 2009 | 1996 Ford F150 Regular Cab

1 Answer

1996 toyota camery code po401

Clean the EGR air passage tube.

Carbon built up is worst inside this air passage tube.

You will need Seafoam or WD-40 and LOT OF TIME to clean out this tube.

A vacuum will help speed up the cleaning.

Please post more information on the comment window.

Aug 11, 2009 | 1996 Toyota Camry

2 Answers

My 1996 dodge caravan is displaying fault code p4030 "exhaust gas recirculation control circuit" is preventing it from passing it's emissions test (Washington State). Is there anything I can take care

check the vacuum line going to the valve and the transducer, this is the black plastic rounnd thing between the egr valve and the intake, chances are the transducer is bad and can only be purchased along with the valve. if you have access to a vaccum gauge you can connect it to the line at the egr valve and raise the rpm to 2000rpm and see if it pulls vacuum, but you can probably count on buying a new valve assembly.
it will come with the tranducer which is probably allyou need. hope this helps.

May 20, 2009 | 1996 Dodge Grand Caravan

1 Answer

1995 Toyota Camry - Code 71 - failed emissions tests

replace the EGR switching valve and have the machanic clear the engine check light. I think it should help

Mar 25, 2009 | 1995 Toyota Camry

1 Answer

Engine light on

Try A DPFE sensor ( Differential FeedBAck ) sensor that controls the EGR .. Lemmie know

Mar 17, 2009 | 1996 Toyota Paseo

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