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Service bulletins for the 2012 Toyota PRIUS

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

467 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Transmission and driveline are shown. Show all

Bulletins, newest first
23TE032023-07-31. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. DP: The Customer Confidence Program is a component of a class action settlement that includes several elements of coverage. The Customer Confidence Program provides coverage as it applies to the Intelligent Power Module (IPM). The specific condition covered by this Customer Confidence Program 23TE03 is failure of the IPM located inside the inverter assembly of the hybrid system indicated by DTCs P0A94, P0A1A, P324E, and/or P3004. If any of these DTCs are detected, various warning lamps on the instrument panel will also illuminate and the vehicle will enter Fail Safe Mode.
T-SB-0134-16-Rev2019-09-03. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM; ENGINE. TSB: REVISION NOTICE July 01, 2019 Rev2: ? Applicability has been updated to 2019 ? 2020 model year Toyota vehicles. ? The Techstream Preparation and Process Overview sections have been updated. October 30, 2017 Rev1: ? Applicability has been updated to include 2018 model year vehicles. Any previous printed versions of this bulletin should be discarded. SUPERSESSION NOTICE The information contained in this bulletin supersedes SB No. T-SB-0012-13. Service Bulletin No. T-SB-0012-13 is obsolete and any printed versions should be discarded. Be sure to review the entire content of this bulletin before proceeding. Flash reprogramming allows the Electronic Control Unit (ECU) software to be updated without replacing the ECU. Flash calibration updates for specific vehicle models/ECUs are released as field-fix procedures described in individual Service Bulletins. This bulletin details the Techstream ECU flash reprogramming process and outlines use of the Technical Information System (TIS) and the Calibration Update Wizard (CUW). Flash calibration updates can only be applied to the vehicle/ECU combination for which they are intended. ECUs have internal security that will not allow them to be programmed with another ECU?s information. NOTE ECU is a Toyota term used to describe integrated computerized devices responsible for managing the operation of a system or subsystem. For the purposes of this bulletin, the term ?ECU? is used as a generic label for the following SAE J1930 standard references: ? Powertrain Control Module (PCM) ? Engine Control Module (ECM) ? Transmission Control Module (TCM) ? Any other Toyota specific control unit
ZE3_Toyota POL142018-10-15. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Warranty Policy Bulletin: Toyota has received some reports indicating the Intelligent Power Module (IPM) located inside the inverter assembly of the hybrid system may fail. This condition is indicated by the hybrid system diagnostic trouble codes (DTCs): P0A94, P324E, P3004, and/or P0A1A. If one or more of these DTCs are detected, various warning lamps on the instrument panel will illuminate and the vehicle will enter fail safe mode.
T-TT-0086-112018-04-23. Service bulletin. POWER TRAIN. TechTip: Condition - The vehicle may be difficult to start or have an abnormally low or rough idle after the battery has been disconnected or power to the Engine ECM has been interrupted.
T-SB-0391-08 Rev2018-04-23. Service bulletin. POWER TRAIN. This bulletin contains general vehicle pulling diagnosis and repair procedures along with specific information to help correct pulling complaints.
ZE3_Warranty Pol2018-04-02. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. Warranty Policy Bulletin: Toyota has received some reports indicating the Intelligent Power Module (IPM) located inside the inverter assembly of the hybrid system may fail.
ZE3_Dealer Packa2018-04-02. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. Warranty Dealer Package: Warranty Enhancement Program to extend the warranty coverage for repairs related failure of the Intelligent Power Module (IPM). The vehicles covered under this Warranty Enhancement must first have Safety Recall E0E (launched in mid-February, 2014) performed (if applicable).
T-SB-0041-152017-08-14. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). TSB: Some 2010 - 2013 model year Prius and 2012 - 2013 model year Prius V vehicles may exhibit a MIL "ON" condition with Diagnostic Trouble Code(s) (DTCs) P0A0F (Engine Failed to Start), caused by Purge VSV/PCV line separation from the throttle body housing. One or more of the following DTCs may also set: * P3190 (Poor Engine Power) * P3191 (Engine Does NOT Start) * P0171 (System Too Lean [Bank One]) Replace the Purge VSV (Vacuum Switching Valve Assembly) and reprogram the Engine Control Module/ECM (SAE term: Powertrain Control Module/PCM) with the latest calibration to address this condition.
T-SB-0041-152017-08-14. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). TSB: Some 2010 - 2013 model year Prius and 2012 - 2013 model year Prius V vehicles may exhibit a MIL "ON" condition with Diagnostic Trouble Code(s) (DTCs) P0A0F (Engine Failed to Start), caused by Purge VSV/PCV line separation from the throttle body housing. One or more of the following DTCs may also set: * P3190 (Poor Engine Power) * P3191 (Engine Does NOT Start) * P0171 (System Too Lean [Bank One]) Replace the Purge VSV (Vacuum Switching Valve Assembly) and reprogram the Engine Control Module/ECM (SAE term: Powertrain Control Module/PCM) with the latest calibration to address this condition.
ZE3_WEP_Dealer D2017-08-01. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Electronic Communication: In our continuing efforts to ensure the best in customer satisfaction, Toyota is announcing a Warranty Enhancement Program to extend the warranty coverage for repairs related to failure of the Intelligent Power Module (IPM). The vehicles covered under this Warranty Enhancement must first have Safety Recall E0E (launched in mid-February, 2014) performed (if applicable).
T-SB-0006-11 Rev2017-08-01. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES; POWER TRAIN. TSB: World Standard (WS) Automatic Transmission Fluid (ATF) was introduced to reduce maintenance costs and increase the mileage between scheduled maintenance checks. Here are some important tips when working with ATF-WS in Toyota vehicles requiring it's use.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.