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We have searched quasi-periodic oscillations (QPOs) for BL Lac PKS J2134-0153in the 15 GHz radio light curve announced by the Owens Valley Radio Observatory40-m telescope during the period from 2008-01-05 to 2019-05-18, utilizing theLomb-Scargle periodogram (LSP) and the weighted wavelet Z-transform (WWZ)techniques. This is the first time that to search for periodic radio signal inBL Lac PKS J2134-0153 by these two methods. These two methods consistentlyreveal a QPO of 4.69 $\pm$ 0.14 years (>5 $\sigma$ confidence level). Wediscuss possible causes for this QPO, and we expected that the binary blackholes scenario, where the QPO is caused by the precession of the binary blackholes, is the most likely explanation. BL Lac PKS J2134-0153 thus could be agood binary black hole candidate. In the binary black holes scenario, thedistance between the primary black hole and the secondary black hole is1.83$\times$10$^{16}$ cm.

Detection of a possible high-confidence radio quasi-periodic oscillation in the BL Lac PKS J2134-0153