Idling problem

Thank you for your reply and for helping. Well, I tried to reset the values for the throttle body (same as the learning process) but through the ECU using an OBD2 scanner with the resetting tab and nothing happened. I will go with the learning process but I think it won't go anywhere since I did it through the ECU numerous times but I will try it. Normally if there was any kind of a problem with the wires won't the ECU throw some codes? And by the way the connection where tested and it seems fine, the problem only happens when the car at park and no A/C, or at N and no A/C.
Other than that it seems fine. At park with A/C fine, at N with A/C fine, At drive with A/C or without fine it moves a bit but not as much between 500 and 800 max, but only with the first 2 cases this problem happens. Some mechanic told me it might be the throttle body is going bad and having some internal problem with the gears that's why it's happening. But if that's the case shouldn't be happening all the time not only with the first 2 cases? Other mechanic told me it might be the pedal sensor is going bad but shouldn't throw a code? Other told me it might be a vacuum leak but same thing won't be all the time not only with the first 2 cases? I am really lost here and I don't have a lot of experience in this so I appreciate any kind of help and support regarding my questions.

Thank you very much Joe I really appreciate your reply and help.

It's not a turbo, it's 1.6l MPI engine, as far as I know there is 3 kinds of engines for this car
1.6l MPI
1.6l GDI
1.6l Turbo
Mine is
1.6l MPI DOHC
Yep that's the problem no codes at all, I even went as far as checking the ECU with 2 different OBD2 scanners
Chinese one paired with my phone and tourq app, and Maxidas from Autel both with zero codes and everything running perfectly even the short term fuel trim between -0.74 and +1.6
And the long trim between +1 and +2.6 that's what is spinning my head no codes at all, even if we considered the throttle body having an internal problem it should give a code since it's a electric throttle body and pedal also same thing and the weird thing that it only happens with the first 2 cases, one of my friends told me to take the duct cover and inspect the throttle body plate if it did move while the engine is revving he said it's the throttle body is going bad but I am not sure about this way of testing since maybethe ECU is sending a commend to the throttle body to open from a faulty sensor but at the other hand the ECU should show a code if any sensor is going bad. I don't know for sure but this is what I have so far.

Thank you : )

Sorry for the late reply, I did a can bus scan zero across all the systems. I did the other scan for the APS or in my scanner it was app anyway for me the numbers seems to meet the same numbers in the pictures I got from you, and I did upload some videos and pictures for the results, the video starts with closed throttle and I press the pedal to max so the video always starts with zero pedal to the max and the results in the videos will be from CT to WOT please check them, but according to my checking it meats the required specs, and by the way it shows also the numbers for the throttle body not only for the pedal so this may also be helpful.
Thank you very much for trying to help me.

Yes, it was happening, but under the scan I can't confirm because the scan was while the car off and the switch on as the instructions, but before the scan it was happening ( while the car were running ). As I understand this scan should be while the car off and the switch on because this scan will show the voltage that's what I was able to gather. Now from the numbers it seems that's the pedal is working within specs, but the throttle body I can't confirm because I don't know how much the voltage should be, in the videos I did upload it shows the voltage for the throttle body so if you have anyway of making sure it's within the specs please check it. If all within the specs the throttle body and the pedal is out of the way. From your experience what might be causing this problem.
I know it's hard to know since you can't check the car in person but I am trying my best to get you in the picture about what is happening and I am really thankful for your help and what your are doing I really appreciate it. : )

Thank you

You're right. The first picture with the plate closed CT.
The first video you can see it clear TPS1 and TPS 2 with CT and WOT the numbers don't match exactly can you check the first video, it starts with CT and after that WOT and CT and after that WOT, something I don't understand very will there was 2 types of TPS one just TPS and the other TPS 3.3V is there a difference? Or just another name for the sensor. Can you check it from your experience because for me the numbers seems different by a bit. Even TPS 1 starts 0.4 not 0.5 as the diagram and TPS 2 starts 2.9 not 4.5 CT and at WOT TPS 1 starts 2.8 not 4.41 and TPS 2 0.5 not 0.59
Should the numbers be exact or there's are room for error.

Thank you

It seems like both sensors are switched TPS 1 at the start close to the number from the diagram and TPS 2 is way of at CT, and at WOT TPS 1 is way of and TPS 2 is close to the diagram like they are switched or something.

Also, what it doesn't make sense is if the throttle body is going bad and there's a problem with it why it does happen only with the first 2 cases I mentioned before why not all the time, and no codes?

Also what it doesn't make sense is if the throttle body is going bad and there's a problem with it why it does happen only with the first 2 cases I mentioned before why not all the time, and no codes.

Yes, I used a CRC throttle body cleaner and cleaned it but nothing after the cleaning same issue and something worth mentioning a year ago or so the throttle body was taking off and cleaned fully outside the engine from a mechanic as a full service for the car at the time and he took it out and opened the gears plastic cover and checked the gears and seal it back again and install it no problems at that time with the throttle body it was only as a full service for the car and after that also no problems only 3 weeks ago (now 4) started. At the other hand regarding the codes that's what is throwing me off no codes. Something about my car I had some issues before (long time ago) not a single time I had a CEL but when scanning with OBD2 I get some codes some like a bad crank case sensor but no CEL it's like Hyundai didn't put a CEL in my dashboard I only notice the issues with no CEL and after scanning I get there is a problem and a code, this time no CEL ( as usual ) and no code that's what is throwing me off. For the sensors as far as I know and I might be wrong in this specific model the sensors come as one unit with the throttle body I might be wrong but that's what I know.
I really appreciate your help Joe I truly do and I appreciate you asking Ken for his opinion regarding this weird problem and welling to answer as much questions. Just to get this issue out of the way.

Thank you : )

Yes, I used a CRC throttle body cleaner and cleaned it but nothing after the cleaning same issue and something worth mentioning a year ago or so the throttle body was taking off and cleaned fully outside the engine from a mechanic as a full service for the car at the time and he took it out and opened the gears plastic cover and checked the gears and seal it back again and install it no problems at that time with the throttle body it was only as a full service for the car and after that also no problems only 3 weeks ago ( now 4 ) started. At the other hand regarding the codes that's what is throwing me off no codes. Something about my car I had some issues before ( long time ago ) not a single time I had a CEL but when scanning with OBD2 I get some codes some like a bad crank case sensor but no CEL it's like Hyundai didn't put a CEL in my dashboard I only notice the issues with no CEL and after scanning I get there is a problem and a code, this time no CEL ( as usual ) and no code that's what is throwing me off. For the sensors as far as I know and I might be wrong in this specific model the sensors come as one unit with the throttle body I might be wrong but that's what I know.
I really appreciate your help Joe I truly do and I appreciate you asking Ken for his opinion regarding this weird problem and welling to answer as much questions. Just to get this issue out of the way.

Thank you : )

Thank you very much Joe and thanks for Ken to confirm it. I really appreciate the help and kindness and your time for helping me in this issue and you did your best since you didn't check the car in person.
As I suspected the throttle body and the sensors in this specific model comes as one unit so I need to replace the throttle body in order to replace the sensors, just to make sure because it's not cheap we are like 80% sure that's the problem is from the throttle body right? And just to make sure from your experience why it only happens when there is no loads on the engine and when there is a load it's back to normal is that the way it's supposed to be? And I guess and I am not sure regarding the codes that the numbers didn't go far I mean they are still within the limits that's why it didn't show a code I might be wrong.