Engine speed hunts on idle. Auto trans slow shift.

OK , ALL WE GET HERE IS HUNTS.
is it auto matic trans or manual stick shifted, hummmmmmmmm?
CVT trans or 5AT or? hybrid, (3 choices not told)
no engine told , no transmission told (matched) and no country told
must we engage the "super hyper ESP , command drive", sure
answering for USA car. (and auto shifted)
omg they are not the same car , all over earth, NO.!!!
2010 is generation 8th of 11.
sedan or coupe?????????????????????
output speed sensor i guess someone scanned the cars PCM and belched out DTC secret untold code>> (what if you looked up DTC wrong, ouch)
double ouch.(fibbing to me)
27 body styles in USA> sold. 2door and 4 and omg HYBRID cars.
NO USA VIN told to look up and gee, what is there is patently obvious..
2door DX CAR. KA , 5AT CAR. 5 SPEED BOX !
There is my wild and near useless guess, but shows you how to learn what is under the hood, (NO VIN told NO JOY)
gee the honda dealer, flat (parts) refused to to talk to you lacking the VIN.
engine 1.8liters (guess) gas or CNG? (natural gas compressed)

or 2.0L? or 1.3L , oops lots.
5AT box.? (I guess this)
the problem with transmission vast on this car are
that some sensors can be deep inside the box. OK
super common that now..
or speed sensors are not used there, due to ABS x4 sensors are all that is needed, like my 08 up jeeps do.
see???????????????
why the hunt post, why not scan the PCM and post all DTC there,
and ask what to do and end this silly useless hunt stuff.???

but I will now show the DTC reports for all speed sensors
2010 DX civic USA.
one car manual states (usa DX)

below is VIN decode on just the DX civic, a wild guess of 27 models sold in USA> see the engine code,see door code'
and transmissions,

learn to post what's wrong first/
state evidence and symptoms first.
car shifts funny? and scanned it? and got a bunch of DTC errors and some internet dweebs told you wrong (endless)<<sure !!!
the codes in the HONDA manual only matter.
for sure DTC P07xx errors or any other P1,P2XXX CODES
OR ANY NONE P0XXX CODE MUST BE LOOKED UP IN THE SERVICE MANUAL HONDA FOR the correct model
sorry but that is how the cookie crumbles on todays complex cars.
for sure lots of computers on board, for sure.

NO DTC told NO JOY ever.

check the MAP sensor (manifold absolute pressure). The ECM (car computer) uses that to keep idle at minimum 750 RPM. It's normal for it to run high when cold. These small 4 banger motors typically run hot, and they won't run right IF they're NOT running hot, ergo the idle is usually high when it is cold so as to cause it to warm up quicker. If the RPM's drop below 750, suspect the MAP sensor, &/or ECM.

1ST THING YOU NEED TO DO IS CK TRANS FLUILD ON FRONT SIDE OF TRANS AND MAKE SURE IT IS NOT LOW,AND MAY ALSO START BEING SIGNS OF TRANS ISSUE,NEED TO HAVE CK BY TRANS SHOP IF FLUILD IS NOT LOW SO YOU WANT DO ANY MORE DAMAGE IF CASE OF TRANS ISSUE,HOPE I WAS A HELP

Try the procedure below.

Here are the most common causes of idle surge, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake

it may not be a solenoid--but dirty fluid or filter or even level--mite be a computer control issue too--have car scanned and a data stream run that shows in detail--a test drive by an experienced tech helps but dont fall fora rebuild cause trans can last to 300 thou miles

Stop using it & have the water pump &
timing belt replaced

Your Idle speed control or ISC needs to be replaced. Check for vacuum leaks.

Vehicle Speed Sensor (VSS) or check the transmission control module for burned capacitors, etc.

Check this out, http://www.hondahookup.com/forums/showthread.php?t=147179
Step by step guide to diagnosing idle issues on your honda.

your car has a timing chain with a hydraulic tensioner. is it just an unstable idle ( revs up and down) or does the engine have a slight misfire?