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Hyundai XG300 2001 fail emission test P0163,P0401 CAR DRIVES EXCELLENT

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  • Hyundai Master
  • 5,617 Answers

Change sensor bank2 sensor 3.

Posted on Aug 16, 2017

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

daves944
  • 1050 Answers

SOURCE: vehicle failed emissions testing

You need to replace the intake upper plenum gaskets. There is two pieces, a top cover with one big silicone o-ring gasket and a lower half with six smaller silicone o-rings for the individual intake ports. You can buy these as a set, just for this job. Start this job by removing the wiper blades, then release all the screws, (including the ones that support the wiper motor), that hold that big black plastic valence at the back of the engine compartment. Pull that out of the way, you will have to pull the windshield washer hose through it, just disconnect it on the engine side, now you have access to the plenum. It's a pretty easy job now to remove and replace both halves, just a bunch of 8mm screws hold it all together. Take notes or digital pics along the way so you can pop it all back together. My only caution would be; when you have it apart, do not drop anything in the intake port! I always stuff kleenex in these while I'm working in case something slips out of my hands. Also, don't over tighten, it's all plastic. If you don't want to do it yourself, a shop should charge about an hour and a half, plus the codes must be reset and the van driven until all the monitors are ready.

Posted on Mar 26, 2009

  • 65 Answers

SOURCE: My 1991 4runner failed emissions test with high CO and HC levels.

Not sure, but did you replace the oxygen sensors. Is your catalytic converter still good?

Posted on Aug 21, 2009

  • 9 Answers

SOURCE: failed emissions....high nox

Sticking egr will raise everything except nox. Bad o2 bad cat hard to give an accurate diagnosis with out checking it

Posted on Nov 13, 2009

Molson02536
  • 3854 Answers

SOURCE: Did not pass state inspection (vehicle)

First the fault codes,
U110C is No Fuel Level Bus Message
U0155 is No Cluster Bus Message.
Unfortunatly you have to be able to communicate with the instrument cluster with your scanner to diagnoise and I do not think an aftermarket scanner can do this.




Posted on Mar 02, 2010

duane_wong
  • 6826 Answers

SOURCE: Car failed emission test intake

change the intake iar temperature sensor to pass the test.

Posted on Dec 18, 2010

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2 Answers

How do I correct a P0401 code on my 2.2 chevy corsica


The passages are plugged ! pull EGR valve an inspect passages and the pipe for a restriction or damage and repair as necessary.

May 30, 2015 | Chevrolet Corsica Cars & Trucks

1 Answer

P1443,p0401 and po420 failed emission


P1443 is an EVAP code which means the purge control solenoid.P0401 is an EGR valve and code p0420 is a catalytic converter.

Mar 28, 2014 | Cars & Trucks

1 Answer

P1443,po420 and po401 -failed emission... how to repair


p1443 is Purge control solenoid , p0420 is catalytic converter and Egr vale for code p0401

Mar 28, 2014 | Cars & Trucks

1 Answer

The check engine light is on, the EGR valve has been replaced, code P0401 appears on diagnostic. The engine is 4 cyl DOHC 2 wd. slight exhaust odor at times in vehicle.


Are you reset the stored codes there? The EGR (Exhaust Gas Recirculation) valve controls an engine's emission of smog-causing nitrous oxides, or NOx. Its job is to route a portion of the exhaust gases back into the intake manifold. That lowers combustion temperature to below 2,500 degrees Fahrenheit - the temperature at which NOx gases form.

EGR flow is controlled by the engine's computer, which opens or closes the valve as needed. The EGR system is, for the most part, in the "out of sight, out of mind" category, and typical doesn't require regular maintenance. But if it gets clogged with carbon deposits, you'll see your "check engine" light come on, and a code (perhaps P0401 or P0402 or P0403) will show that there is insufficient flow. That typically results from a vehicle being driven persistently on short trips that don't allow the engine to fully warm up. Flow problems also can be caused by carbon buildup due to failure to change the oil frequently enough.

A clogged EGR valve not only results in higher emissions, it can affect fuel economy and cause rough idling - even serious engine damage. Valves can usually be cleaned, but replacement is often recommended.

About thie generic fault code, I suggtes check this description and tips for solution information: DTC-P0401-Tests (keep in midn that this code applied for alot brands, Hyundai included).

Keep us updated.

Feb 09, 2011 | 2003 Hyundai Santa Fe

1 Answer

My Ford Taurus just failed a vehicle emission test due to diagnostic codes P0401, P0402, and P1400. Can you tell me what these codes are for and what type of repair is needed? Thanks.


plz check the fuel and carborater first then go for silencer (if your car runned above 15000 kms got repair shop) even u can neglet, coz thees error come during winter sesion [they are related to carben and moister]

Jun 23, 2010 | 2002 Ford Taurus

1 Answer

Hyundai accent 1999 failed emission mot test


there are many
systems in your car that could cause it to fail emissions tests. lucas will not harm your car but it will not fix the problem either. the emission test should give you a reason for the failure. you should be able to track down the problem with step by step procedure for that particular system.
is your check engine light on? any generic scan tool can scan the vehicle data to determine witch system may be causing the problem. could be as simple as a tune up or a faulty o2 sensor.

Nov 26, 2009 | 1999 Hyundai Accent

1 Answer

Need to know how to change the gr valve. Can;t locate it.


As your engine wears, horrible black grunge builds up in the EGR and closes it off like an artery. The net result is .. you fail the emissions tests There are frour related items on any Ford truck to your EGR system. You must know what item is bad. The valve can be checked easily by removing it and check if it holds vacuum. Also clean the internal area with carbon build up. The solenoid, relay switch, & manifold switch can not be restored at all

May 24, 2009 | 1998 Ford F150 Regular Cab

1 Answer

1997 Toyota Celica Failed Emissions Testing


Generaly o2 code comes up when anything at all is wrong in the combustion process. I'd have the egr valve tested and cleaned as well as the passages to and from it...They often get plugged up with carbon.

Apr 09, 2009 | 1997 Toyota Celica

1 Answer

1997 Toyota Celica - Codes P0133 & P0401


well if its poping an o2 code try a couple things before you start spending money. when it starts up listen for a rattle from the cattilitic convertor. if you have a bad rattle replace the cat that might solve both codes if no rattle replace the o2 sensor, it might just be that. hope this helps

Apr 09, 2009 | 1999 Saturn SL

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