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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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Bulletins, newest first
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).
ZE3_WEP_Dealer L2017-08-01. Service bulletin. ELECTRICAL SYSTEM; HYBRID PROPULSION SYSTEM: INVERTER. Dealer Letter: 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 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). In these vehicles, Toyota has received some reports where the Intelligent Power Module (IPM) located inside the inverter assembly of the hybrid system may fail. This condition is indicated by 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 also illuminate and the vehicle will enter fail safe mode. Although the Hybrid Inverter assembly is covered by Toyota?s New Vehicle Limited Warranty for 8 years or 100,000 miles (whichever occurs first), we at Toyota care about the customers? ownership experience. Toyota is now extending the warranty coverage for repairs related to failure of the Intelligent Power Module (IPM).
ZE3_WEP_Publishe2017-08-01. Service bulletin. HYBRID PROPULSION SYSTEM: INVERTER; ELECTRICAL SYSTEM. Region Letter: 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). In these vehicles, Toyota has received some reports where the Intelligent Power Module (IPM) located inside the inverter assembly of the hybrid system may fail. This condition is indicated by 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 also illuminate and the vehicle will enter fail safe mode. Although the Hybrid Inverter assembly is covered by Toyota's New Vehicle Limited Warranty for 8 years or 100,000 miles (whichever occurs first), we at Toyota care about the customers' ownership experience. Toyota is now extending the warranty coverage for repairs related to failure of the Intelligent Power Module (IPM). Please see the Warranty Enhancement Program Details for additional information.
T-TT-0234-132017-08-01. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). Tech Tip: Since MY 2011, several different update or upgrade USB SSTs have been issued for Toyota audio and navigation systems.
T-SB-0092-142017-08-01. Service bulletin. HYBRID PROPULSION SYSTEM: INVERTER. TSB: The purpose of this general information Service Bulletin is to inform the market that sub-component diagnosis and replacement is now available for the Hybrid Inverter with Converter assembly equipped on 2010 - 2014 model year Prius vehicles.
T-SB-0133-142017-08-01. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM); ELECTRICAL SYSTEM:SOFTWARE. TSB: Toyota models equipped with the Premium HDD Navigation (AVN/AW-EMV) System require a Special Service Tool (SST) USB drive to update the map, points of interest, Gracenote®, and system software. The SST is used with all vehicles to deliver the update, however a unique Activation Number is required for each vehicle. Activation Numbers are provided in an Activation Card Number (ACN) pamphlet available through the normal parts ordering system.
T-SB-0006-13 Rev2017-08-01. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM); ELECTRICAL SYSTEM:SOFTWARE. TSB: Toyota models equipped with the Premium HDD Navigation (AVN/AW-EMV) System will periodically require an update to the Gracenote Database. Gracenote includes detailed information for songs (e.g., Genre, Artist, Song Title, Album Name, etc.) The Gracenote update will be included on the "USB Drive Navigation Map Update" SST. A Gracenote update must be performed before a Navigation Map Update. A Navigation Map Update is not required to complete the Gracenote update.
T-TT-0310-142017-08-01. Service bulletin. ENGINE AND ENGINE COOLING. Tech Tip: Some customers may experience a Knocking sound and/or Runs Rough on engine start following a cold soak. This may or may not occur with DTC(s) P0300, P0301, P0302, P0303 and / or P0304.
T-TT-0309-142017-08-01. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). Tech Tip: Some customers may experience Bluetooth disconnections or loss of SMS Text Message Functionality on the navigation/audio system with Android phones running OS 4.4 or later. Condition tends to occur to customers who have many previous text messages on their phones.
T-TT-0307-142017-08-01. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). Tech Tip: Customer complains of carious Bluetooth connectivity concerns after upgrading to iOS 8.0 and later. Conditions typically experienced include inability to pair the iPhone to the system, poor sound quality during phone calls placed through the audio/navigation system, and the inability to place a hands free phone call using the audio/navigation system.
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.
T-SB-007-13 Rev22017-08-01. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). TSB: September 30, 2014: This bulletin is now obsolete. Please see T-SB-0133-14.
T-SB-0092-14 Rev2017-08-01. Service bulletin. HYBRID PROPULSION SYSTEM: INVERTER; ELECTRICAL SYSTEM. TSB: The purpose of this general information Service Bulletin is to inform the market that sub-component diagnosis and replacement is now available for the Hybrid Inverter with Converter assembly equipped on 2010 - 2015 model year Prius and 2012 - 2015 model year Prius V vehicles.
T-SB-0150-142017-08-01. Service bulletin. EQUIPMENT:ELECTRICAL. TSB: The purpose of this general information Service Bulletin is to announce sub-component diagnosis and replacement is now available for the Hybrid Transaxle assembly equipped on 2007 - 2011 model year Camry HV, 2006 - 2015 model year Highlander HV, 2010 - 2015 model year Prius, and 2012 - 2015 model year Prius PHV and Prius V vehicles.
ZF3_WARRANTY POL2017-06-14. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE). WARRANTY POLICY BULLETIN (POL16-04): IN THESE VEHICLES, TOYOTA HAS RECEIVED SOME REPORTS OF A ROUGH IDLE AND/OR RATTLE NOISE FROM THE TRANSAXLE AT COLD START DUE TO A STICKING EXHAUST GAS RECIRCULATION (EGR) VALVE. IF THIS OCCURS, THE VEHICLE MAY ILLUMINATE THE CHECK ENGINE LIGHT AND SET DIAGNOSTIC TROUBLE CODE (DTC) P0401.
ZF3_DEALER LETTE2017-06-14. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE). DEALER LETTER: IN THESE VEHICLES, TOYOTA HAS RECEIVED SOME REPORTS OF A ROUGH IDLE AND/OR RATTLE NOISE FROM THE TRANSAXLE AT COLD START DUE TO A STICKING EXHAUST GAS RECIRCULATION (EGR) VALVE. IF THIS OCCURS, THE VEHICLE MAY ILLUMINATE THE CHECK ENGINE LIGHT AND SET DIAGNOSTIC TROUBLE CODE (DTC) P0401.
ZF3_DEALER LETTE2017-06-14. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE). DEALER EMAIL: IN THESE VEHICLES, TOYOTA HAS RECEIVED SOME REPORTS OF A ROUGH IDLE AND/OR RATTLE NOISE FROM THE TRANSAXLE AT COLD START DUE TO A STICKING EXHAUST GAS RECIRCULATION (EGR) VALVE. IF THIS OCCURS, THE VEHICLE MAY ILLUMINATE THE CHECK ENGINE LIGHT AND SET DIAGNOSTIC TROUBLE CODE (DTC) P0401.
ZF3_REGION LETTE2017-06-14. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE). REGION LETTER: IN THESE VEHICLES, TOYOTA HAS RECEIVED SOME REPORTS OF A ROUGH IDLE AND/OR RATTLE NOISE FROM THE TRANSAXLE AT COLD START DUE TO A STICKING EXHAUST GAS RECIRCULATION (EGR) VALVE. IF THIS OCCURS, THE VEHICLE MAY ILLUMINATE THE CHECK ENGINE LIGHT AND SET DIAGNOSTIC TROUBLE CODE (DTC) P0401.
ZF3_REGION LETTE2017-06-14. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE). REGION EMAIL: IN THESE VEHICLES, TOYOTA HAS RECEIVED SOME REPORTS OF A ROUGH IDLE AND/OR RATTLE NOISE FROM THE TRANSAXLE AT COLD START DUE TO A STICKING EXHAUST GAS RECIRCULATION (EGR) VALVE. IF THIS OCCURS, THE VEHICLE MAY ILLUMINATE THE CHECK ENGINE LIGHT AND SET DIAGNOSTIC TROUBLE CODE (DTC) P0401.
T-TT-0374-15 REV2017-04-07. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM); EQUIPMENT. "TT: SINCE MY 2011, SEVERAL DIFFERENT UPDATE OR UPGRADE USB SSTS HAVE BEEN ISSUED FOR TOYOTA AUDIO AND NAVIGATION SYSTEMS. REFER TO THE CHART BELOW FOR A COMPREHENSIVE LIST OF ALL CURRENT AND PREVIOUSLY ISSUED USB SSTS AND THEIR APPLICABILITY. "
T-TT-0268-13 REV2017-04-07. Service bulletin. EQUIPMENT. "TT: SOME CUSTOMERS MAY ENCOUNTER BLUETOOTH CONNECTIVITY CONCERNS SUCH AS: • DIFFICULTY PAIRING THE PHONE. • INTERMITTENT BLUETOOTH FAILURE TO CONNECT WHEN FIRST TURNING ON THE VEHICLE. • VARIOUS BLUETOOTH AUDIO FUNCTIONS ARE NO LONGER FUNCTIONING WITH THE CUSTOMER’S PHONE, SUCH AS THE ABILITY TO CHANGE THE TRACK USING THE STEERING WHEEL CONTROLS. THESE CONCERNS CAN BE CAUSED BY CHANGES MADE ON THE CUSTOMER’S PHONE. MAKE SURE TO INQUIRE WITH THE CUSTOMER IF THE CONNECTIVITY CONCERNS OCCURRED AFTER RECEIVING AN OPERATING SYSTEM UPDATE ON THEIR PHONE OR IF THEY HAVE RESTORED THEIR PHONE DATA/SETTINGS RECENTLY."
T-SB-0027-162017-04-06. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. TSB: SOME PRIUS, PRIUS V, AND PRIUS PHV VEHCILES MAY EEXHIBVIT A ROUGH IDLE OR TAPPING NOISE FROM THE HV TRANSAXLE AT COLD START. THE CHECK ENGINE LIGHT MAY ALSO ILLUMINATE WITH (DTC) P0401 (EXHAUST GAS RECIRCULATION FLOW INSUFFICIENT DETECTED). DUE TO EXCESS CARBON BUILD-UP AT THE VALVE ASSEMBLY, THE VALVE WILL STICK, CAUSING THE ENGINE RPM TO FLUCTUATE. FOLLOW THE PROCEDURES IN THIS BULLETIN TO ADDRESS THE CONDITION.
ZF5_T-SB-0036-162017-04-05. Service bulletin. HYBRID PROPULSION SYSTEM: INVERTER; ELECTRICAL SYSTEM. TSB: SOME 2010 – 2014 PRIUS AND 2012 – 2014 PRIUS V MODEL VEHICLES MAY EXHIBIT A MIL “ON” CONDITION WITH DTCS P0A94, P324E, P0A1A, OR P3004, INDICATING A MALFUNCTION HAS OCCURRED IN THE HYBRID INVERTER ASSEMBLY. TO HELP IDENTIFY THE SPECIFIC COMPONENTS WITHIN THE INVERTER ASSEMBLY THAT NEED TO BE REPLACED, FOLLOW THE STEPS IN THIS SERVICE BULLETIN TO ADDRESS THE CONDITION.
ZE3_WARRANTY POL2017-04-04. Service bulletin. ELECTRICAL SYSTEM; HYBRID PROPULSION SYSTEM: INVERTER. WARRANTY POLICY BULLETIN (POL14-05): 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.
ZE3_DEALER LETTE2017-04-04. Service bulletin. HYBRID PROPULSION SYSTEM: INVERTER; ELECTRICAL SYSTEM. DEALER LETTER: IN THESE VEHICLES, TOYOTA HAS RECEIVED SOME REPORTS WHERE THE INTELLIGENT POWER MODULE (IPM) LOCATED INSIDE THE INVERTER ASSEMBLY OF THE HYBRID SYSTEM MAY FAIL. THIS CONDITION IS INDICATED BY 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 ALSO ILLUMINATE AND THE VEHICLE WILL ENTER FAIL SAFE MODE. ALTHOUGH THE HYBRID INVERTER ASSEMBLY IS COVERED BY TOYOTA’S NEW VEHICLE LIMITED WARRANTY FOR 8 YEARS OR 100,000 MILES (WHICHEVER OCCURS FIRST), WE AT TOYOTA CARE ABOUT THE CUSTOMERS’ OWNERSHIP EXPERIENCE. TOYOTA IS NOW EXTENDING THE WARRANTY COVERAGE FOR REPAIRS RELATED TO FAILURE OF THE INTELLIGENT POWER MODULE (IPM). PLEASE SEE THE WARRANTY ENHANCEMENT PROGRAM DETAILS FOR ADDITIONAL INFORMATION.

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