Auger spectra of resonantly excited $2{p}_{3/2}^{\ensuremath{-}1}4s$ and $2{p}_{3/2}^{\ensuremath{-}1}4p$ states in argon were measured by $(e,2e)$ technique. The 99.2-eV scattered electrons were detected in coincidence with ${L}_{3}--{M}_{23}{M}_{23}$ Auger electrons, and the experiment was performed at 343.6- and 344.9-eV electron impact to tune the energy loss to the energy of the dipole-allowed and the dipole-forbidden excitations, respectively. The resonant Auger spectra are obtained upon subtraction of the overlapping signal due to the outer-shell ionization, which was recorded at 340-eV electron-impact energy. The most intense groups of Auger transitions from $2{p}_{3/2}^{\ensuremath{-}1}4s (J=1,2)$ and $2{p}_{3/2}^{\ensuremath{-}1}4p (J=0,1,2,3)$ states are identified by comparison with the results of the two-step model, based on distorted-wave Born approximation with exchange and multiconfiguration descriptions of the relaxed states. The $4 s$ spectrum displays a substantially larger shake-up contribution than the one observed in photoexcitation experiments, which may be explained by the interference of the resonant decay path with the direct ionization excitation of the Ar $3p$ subshell. The majority of the observed $4p$ signal is assigned to the monopole and quadrupole excitations of the ground state.