Some 2012-2014 Toyota Tacoma trucks equipped with 1GR-FE engines may exhibit a spark knock (detonation) during light acceleration and/or uphill in hot weather (80 degrees F or higher). The engine control module (ECM) logic has been modified to reduce the possibility of this condition. Reprogram the ECM with the latest available software version.
For 2012 models four-wheel drive/two-wheel drive (4WD/2WD) PreRunner with 5-speed automatic, the old calibration ID is 30455000. The new calibration ID is 30455100.
For 2012 models with 2WD and 6-speed manual transmission, the previous calibration ID is 30467000. The new calibration ID is 30467100. For 2012 models with 4WD and 6-speed manual transmission, the previous calibration ID is 30468000. The new calibration ID is 30468100.
For 2013-2014 models 4WD/2WD PreRunner with 5-speed, the previous calibration ID is 30480000. The new calibration ID is 30480100. For 2013-2014 models with 2WD and 6-speed manual transmission, the previous calibration ID is 30481000. The new calibration ID is 30481100. For 2013-2014 with 4WD and 6-speed manual transmission, the previous calibration ID is 30482000. The new calibration ID is 30482100.
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.
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.