2002 hyundai sonata lx will not shift gears automatically but will manually

P0335 - Crankshaft position (CKP) sensor - circuit malfunction.
P0755 - Shift Solenoid "B".
P0760 - Shift Solenoid "C".
This is two different problems. Your safest option is to take it to a Good mechanic. The Crank sensor monitors engine speed and can be positioned deep behind other engine parts. The Solenoid issues could be inside the transmission as these control when the gears shift and you will need someone familiar with them to sort it.

Kia


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That is the tiptronic shifter, it allows the driver to manually shift gears without the use of a clutch. She may have bumped it to s much lower gear but there should be no damage done from that. If the rpm is too high the car will override and shift up.

I have one that does exactly this. I have confirmed no codes in trans or engine; I have watched the data on the scan tool and it appears that the PCM is choosing to shift without a change in throttle or speed to cause it. I am looking into a new PCM - ouch!

it will if the transmission cooler inside the rad is leaking check ur coolent for a pink milky substance

Most likely it is a 4 speed automatic over-drive transmission. You can shift it thru the gears if you want a sporty feel, but not needed. The fog light bulbs may be burned out, a bad fog light fuse or switch. Does the switch illuminate when you switch it on?

interesting!... there is NO automatic adjusting control on the 2006 Sonata.

Can you message me what they decided this was. We had this same problem after church, today, though we have an automatic transmission

The input and output transmission sensors may be bad. My car had this malfunction. I replaced the sensors and have had no more problems.