Service Repair

Jeep May Have Bad Tensioner

Oct. 12, 2020

This bulletin applies to 2020 Jeep Wrangler vehicles equipped with a 3.6L V6 engine, built on or after Dec. 13, 2019, or on or before Jan. 25, 2020. The bulletin involves inspecting the Julian date on the hydraulic belt tensioner for possible replacement.

Information courtesy of Mitchell 1

Mike Mavrigian

Customers may experience a MIL on. DTCs that may be set include P2BA3-00 (starter/generator mechanical performance) and P0A92-00 (hybrid generator performance). Issues may involve a dead battery and/or the accessory drive belt may be slipping or have belt noise.

Only vehicles with the Julian date code 15.08.19 on the hydraulic belt tensioner should be candidates for tensioner replacement. Inspect the hydraulic belt tensioner for the Julian date. It may be necessary to use a flashlight and mirror to see the Julian date. If the Julian date on the tensioner is 15.08.19, replace the tensioner with P/N 05281590AB.

If the Julian date is other than 15.08.19, follow normal diagnostics to determine the issue.

About the Author

Information courtesy of Mitchell 1

Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.

About the Author

Mike Mavrigian | Motor Age Editor

Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.