How do i fix trouble code 122 and 102 - 2003 Chevrolet Impala

Question edited for clarity.
Question moved to sub category.

The P2159 diagnostic trouble code is most commonly fixed by replacing the vehicle speed sensor. Keep in mind that ABS components, other trouble codes, and aftermarket tires may be responsible for this code being stored by the PCM. Take time and complete a thorough diagnosis before replacing the vehicle speed sensor.

P2159 OBD-II Trouble Code: Vehicle Speed Sensor B Range ...

Videos as well

https://www.google.com/search?q=2014+Hyundai+Elantra.+How+to+fix+P2159

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this is not a diy fix, take dealer, it will be expensive.
google codes on line for free
https://www.vehiclehistory.com/questions/what-does-the-ford-f150-code-b1318-mean-127934
https://www.engine-codes.com/b1681.html
https://www.smogtips.com/smog-question/4127/How-To-Fix-and-Clear-OBD-II-Trouble-Code-P1000
https://www.carparts.com/blog/u0100-code-lost-communication-with-ecm-pcm-a/

When a warning light is on, a trouble code is stored in the computer. You must get the trouble codes read and fix the underlying problem. Then the light will go out by itself. No fix= light on full time

The 31 code should be air flow meter or its circuit . I would check it first as that will cause idling issues .

http://www.obd-codes.com/p0440

do the easiest cause first... did you recently get gasoline and didn't put the fuel cap back on correctly?

CLEAR the trouble code and re-seat the gas cap properly & then see if the check engine lights up with the same code... then go from there

i've embedded gbob59s link because it should have worked the first time

It sounds like you have to replace the spark plug on cylinder 3

As with all warning lights, the first step is to get the trouble codes read. With over 800 possible trouble codes, it's impossible for anyone to guess what codes are stored in your car's computer. http://ricksfreeautorepairadvice.com/fix-check-engine-light-on

How to fix the p 1706 trouble code on a nissan pathfinder automatic transmission. 2005

That code is the shift solenoid B in the tranny. Have to take it to get it fixed.

The are many things that can cause your "check engine" light to stay on. One possibility is that although you have fixed the trouble code for your crankshaft position sensor, the code has not been erased from the computer's memory. Another possibility is that you have another issue going on that is causing a new trouble code to come up. You're going to need to have your car hooked up to a ODB-2 engine code reader to see what the issue is. These code readers are available for purchase at any auto parts store. In addition, many of your local auto parts stores will check trouble codes as a free service to customer. If not, many parts retailers offer the option to rent one of these code readers. Which ever way you decide to go, run a full engine/emissions trouble code check. If the only code that comes up is the code that came up previous to fixing your positioning sensor, then all you need to do is erase the trouble code from the computer's memory. (Most code readers have the option to erase trouble codes, but if you're going to rent or buy one, I would suggest that you check to make sure that the code reader that you're getting is capable of erasing trouble codes as some code readers only indicate the codes and will not remove them from your computer's memory.) If your trouble code scan reveals other codes, then you'll have to fix and erase them as they arise.

FYI- In my experience, I've noticed that 95% of the time that a check engine light/trouble code arises that it is usually an emissions problem (oxygen sensors, mass air-flow units, MAP sensors, etc.). However, General Motors products are notorious for getting trouble codes for having loose battery/ground connections and for having worn-out fuel caps. With any GM vehicle, I always check these two things first to try to save me from having to look further than I need to.

Hope this helps! I'm sure once you've scanned your cars computer and erased any existing trouble codes, that you'll stop being annoyed by your check engine light, as I know how bothersome it can be. Have a great day!