The typical pale gold (slight greenish tint) CD-R data discs aren’t “digested well” by many audio disc players, computer optical drives usually work with them…
Car players In my experience don’t like the pale pthalocyanine dyed discs.
If you buy discs specifically labeled as audio they not only are more expensive (because the royalty was paid on them) but they typically have a thicker topside coating (to resist handling damage)
and MOST IMPORTANTLY are made with the blue-green “Cyanine” discs. which is easier for the player to read.
Have you tried repeatedly inserting the disc into your car stereo, ejecting and reinserting after it fails to play?
My own car stereo is VERY finicky about what it’ll eat.
but it will play the cheap Ritek made pthalo-cyanine discs
IF I have the patience to insert them three or four times
and NEVER need to interrupt the play… pausing, stopping
turning the unit or the car off and I have to start over…
Consequently I don’t use those discs for wav/CDA discs.
(My CD changer plays anything including the earliest 2x CD-RW’s)
what make, model and approx year of manufacture is your car stereo?