1995 Toyota Tercel code p0409

I have a 1995 Toyota Tercel with P0401. Cleaned EGR vale and tube from EGR valve to intake manifold, Both working. Clean intake manifold hole where the EGE tube goes in with small wire brush and carb cleaner, have good vacuum from intake manifold, When engine warms up EGR vale lifts, If I lift up on EGR diaphragm no change in engine performance. Reset code, code comes back. Please help.

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theodore ritter

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Posted on Aug 19, 2017

theodore ritter

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If you manually push up on the EGR valve and the engine doesn't stall and the passages are all cleaned out then the problem is the EGR valve.

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Mike Butler

6674 Answers
Posted on Jan 24, 2009

SOURCE: OBD code 0401 (1997 Toyota Camry 4 cyl)

There is a VSV (vacuum switching valve) , usually mounted on the back side of engine block, under the intake manifold, as well as the map sensor, that can also cause that code if one or the other is faulty. It takes some pretty detailed troubleshooting to confirm this in some cases, so if that's not in your line of work, you may have to have it properly diagnosed, or take a 50/50 shot at which one first.

Anonymous

3533 Answers
Posted on Feb 14, 2009

SOURCE: engine idles rough, misses at 2500-3000 rpm's

i would first check the timing and if that does not fit i would take the cover back off and look at the belt for a bad or missing tooth

Anonymous

2004 Answers
Posted on May 27, 2009

SOURCE: p0401 code

P0401 indicates that EGR Flow Insufficient.

But if you have handled it and believe it is okay, I will give you tips on turning the warning off.

All trouble codes must be purged from the ECUs memory after repairing the faults. Otherwise, code(s) would remain in the ECUs memory indefinitely and would appear along with a new code in the event of a future problem.
Remove the EFI fuse (15A) for 30 seconds with the ignition switch OFF to clear any codes. It may take longer than 30 seconds, depending on ambient temperature (the lower the temperature, the longer the fuse must be left out).
Trouble codes can also be cleared by disconnecting the vehicle battery. However, other memory functions (clock, radio, etc.), will need to be reset.
After the codes are cleared, road test the vehicle (as applicable for the fault) and recheck if any codes reset. If so, it indicates that the trouble area has not been repaired correctly.

Or remove the battery terminal head for 10 minutes.

Anonymous

14 Answers
Posted on Jun 05, 2009

SOURCE: Code P0401 toyota Camry 3.0 v6

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

kevingsuzuki

752 Answers
Posted on Feb 13, 2010

SOURCE: 1999 toyota RV4 code P0401

It means that the egr valve is working, the problem is a very common one, it's the egr modulator valve and to some extent the vacuum switching valve(VSV) for the egr valve, the modulator is attached to the egr valve, remove it and if air can pass from the bottom port through it is defective, in that case replace it and see if it takes care of the problem, if the valve is ok the egr
vsv should be replaced.

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1996 Toyota Corolla. How do I fix code P0401?

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Like all solenoid valves, you can clean them with throttle body cleaner and then test the solenoid electronically with a 12 volt supply.

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Jan 20, 2007 - on EGR codes, we recommend replacing the EGR, vacuum modulator and VSV (if equipped) and cleaning out the carbon buildup to the intake from the ...
If that finds nothing wrong, remove the EGR valve and bypass tube and check them for cleanliness and blockages. If they are blocked, follow your maintenance manual's instructions for cleaning them out so you do not damage the valve, then replace them and reset the ECM.

Insufficient EGR Flow - P0401 Code - Toyota

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Jan 12, 2024 • Toyota Cars & Trucks

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How do you clear a blocked exhaust when code says insuffient emisions

egr valve bad,P0401 OBD-II Trouble Code Technical Description Insufficient EGR Flow What does that mean? EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor EGR (DPFE). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0401 code means that OBD detected an insufficient amount of EGR. Symptoms You may notice drivability problems such as pinging (a.k.a. pre-ignition knock) when the engine is under load or the vehicle is at higher speeds. There may also be other symptoms. Causes A code P0401 most likely means one or more of the following has happened: The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced There is a blockage in the EGR (tube), most likely carbon buildup The EGR valve is faulty The EGR valve may not be opening due to a lack of vaccuum Possible Solutions In fixing this code, it is quite common for people to just replace the EGR valve only to have the OBD code return. The EGR valve is not always the culprit. Use a vacuum pump and pull the EGR valve open while monitoring engine RPM's & DPFE voltage. There should be a noticable difference in RPM's with the EGR open Clean out the EGR valve and/or tubing to remove deposits Check the voltage at the DPFE, compare to specified values (refer to a repair manual for your specific model) Replace the DPFE sensor (with a good quality / OEM one) Replace the EGR valve Related EGR codes: P0400, P0402, P0403, P0404, P0405, P0406, P0407, P0408, P0409

Read more at: http://www.obd-codes.com/p0401
Copyright © OBD-Codes.com

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May 31, 2015 • Cars & Trucks

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What is code P0401

EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor EGR (DPFE). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0401 code means that OBD detected an insufficient amount of EGR.

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Jan 29, 2015 • 1996 Toyota Tercel

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Code P0401 for Toyota Tercel 1996

It means that the EGR flow is insufficient. This can be caused by several things, a couple of them are- a bad EGR valve, you can test it with a vacuum pump. It can also be caused by the EGR plumbing being clogged up. The engine will run fine with that code, it only effects you exhaust emissions at cruising speed, that is the only time the valve opens, to recirculate exhaust gas which reduces combustion chamber temperatures and thus reduces emissions.

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Jan 29, 2015 • 1995 Toyota Tercel

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A P0401 code sets. I have done the egr valve three times on this car. I have cleaned the intake and the exhaust tube five times. The last time was only 1000 miles ago. The egr valves are new from the...

Restriction in the EGR passages, usually caused by carbon buildup
The EGR Valve is defective
Lack of proper vacuum or electrical signal to the EGR valve
Malfunctioning EGR Vacuum supply solenoid
Lack of proper EGR system feedback to the computer from the:
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Feb 28, 2011 • 2006 Suzuki Grand Vitara

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How do I clean the EGR PIPE in this 1996 Trooper? I have a P0401 code, have replaced the EGR valve, put a cleaner thru the system via the air intake, put a cleaner in the gas and still the P0401 code. I...

It should just unbolt. The problem is those tend to get frozen to the exhaust manifold, especially the higher mileage ones. Once you get it of, let it set in carb cleaner for awhile. If you have a flexable wire gun stock type brush, this will help aid you in this. You might even try a local machine shop for the carb solvent if you do not have any.

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Where is the EGR valve locate in a 1997 toyota tercel 1.5 four doors.

Check this VIDEO for removing, cleaning, and reinstalling the EGR valve on my 95 Toyota Tercel.

Hope helps (remember to rate this answer).

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Dec 20, 2010 • 1997 Toyota Tercel

3helpful

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Whats does code P0401 mean ??

Hi,

P0401 means insuffient EGR flow:

EGR stands for Exhaust Gas Recirculation, which basically sends some of the exhaust back into the engine cylinder again. Your error means that there isn't enough of the exhaust gas making it back to the intake manifold.
The first thing I'd check is the tubes coming off of the EGR valve to make sure they aren't clogged or broken. Then I'd check the EGR valve itself and the throttle body. The problem is usually:
1.) Carbon buildup causing a clogging.
2.) Broken hoses.
3.) Broken Valve.

Best regards.

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Oct 28, 2010 • 1996 Honda Accord

4helpful

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Engine lt on

There is a vsv (vacuum switching valve) located under the intake manifold that goes bad very often causing this code. Its hard to get to. Follow the hoses from the black plastic round valve(egr modulator) you see next to the EGR valve to find the vsv.

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Apr 02, 2009 • 2000 Toyota Camry

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