Engine light on in hyundai tucson even after changing egr valve. Any clues why?

If EGR temp not correct try cleaning it maybe its gunked up and not giving a correct reading.

EGR, on a Hyundai, RAV4, nice motor swap.......
ok, do as everyone does.
1: clean it.
2: if cleaning fails, a new one, is the only option.

most easy question ever.
we clean both. at same time iSC and EGR.

problem is typically the sensor or the device that is being monitored by the sensor. The the EGR return pipe is not properly engineered, a cold pipe with cause the inside to gum up with carbon deposit. This pipe is used to pick up exhaust gas to dilute the air before the combustion. If this "connection" is clogged, you will have a rough time at higher speeds. Pipe is easy enough to remote and take a look inside. If the gum up is too thick, I won't spend the time to chissle this out and just buy a replacement.

Replace the EGR valve then reset the computer.

I want to change the EGR valve Myself in my 2003 Hyundai XG350L anyone know how to do that?

There is NO EGR valve/system on the 2005 Tucson. This particuar powertrain uses the CVVT (Continuous Variable Valve Timing) system which eliminated the need for EGR.

Go to www.hmaservice.com and register your vehicle by VIN #.. you'll then have access to wiring diagrams, shop manuals, service bulletins, illustrations and procedures, etc.

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.

go to autozone buy a repair manual.its about.$24.00 dollars.it will show you show you how to do your own repair.you go buy the egr valve and tps sensor.now on the egr valve make sure the port in the intake where the egr valve is not stop up with carbon.if so becareful and easy cleaning out the carbon using a piece of clothes rack .clean up the debris.reason so because egr valve is not cheap.i seen them from $250.00 and up.you dont want to buy one if you dont need it.

On the 2L (4 cylinder) engine it is recommended to inspect the belt at 37200 miles and replace the belt at 56000 miles.

On the 2.7L (V6) it is recommended to replace the belt at 60000 miles.

And, both these engines are interference engines (meaning if they break a belt, pistons hit and bend valves) which is not a pretty sight...