News Technical Service Bulletins

Jeep May Have Bad Tensioner

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Location of the Julian date on the hydraulic belt tensioner.


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. 

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.

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