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Service bulletins for the 2012 Toyota Tacoma

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.

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

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Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
T-TT-0005-102018-04-23. Service bulletin. ENGINE. Starting with 2010 Model Year, Toyota began a gradual transition to the use of synthetic 0W-20 viscosity engine oil. There a re man benefits of this oil.
T-TT-0010-10 Rev2018-04-02. Service bulletin. BACK OVER PREVENTION; ENGINE. Tech Tip: Low battery voltage can contribute to a MIL "ON" condition for P0335 (Crankshaft Position Sensor Circuit) and/or P0340 (Camshaft Position Sensor Circuit) due to inconsistent rotational speed of the engine's crankshaft.
T-TT-0262-13 Rev2018-04-02. Service bulletin. ENGINE. Tech Tip: Starting with the 2010 Model Year, Toyota began a gradual transition to the use of synthetic 0w20 viscosity engine oil. There are multiple benefits of this oil including: Reduced friction and wear on engine surfaces, Improved fuel economy, Reduction in waste oil stream (in vehicles approved for 10,000 mile oil change intervals), Reduced maintenance cost (in vehicles approved for 10,000 mile oil change intervals). Due to the improved performance and durability of 0w20 synthetic oil, Toyota has extended the oil change intervals to 10,000 mile for most vehicles that require this oil. With this change, the following should be noted: The 2TR-FE (4Runner/Tacoma) and the 3UR-FBE (Flex Fuel Tundra/Sequoia) are the exceptions to this new change interval program; these engines have not been approved for the 10,000 mile interval at this time. A 5,000 mile oil change interval is still required for these vehicles. Also, the Flex Fuel 3UR-FBE requires a 2,500 mile interval when operated on E85 50% of the time or more. Only Toyota vehicles in which 0w20 oil is mandatory (except for the 2TR-FE & 3UR-FBE Engines) have been approved for extended oil change intervals. Vehicles in which 0w-20 is an option to 5w20 (or 5w30) will continue to require 5,000 mile change intervals, even if 0w20 oil is used. In case of vehicles with 10,000 mile oil change intervals, the 5,000 mile service interval has not been eliminated. The traditional 5,000 mile maintenance procedures (such as tire rotation) will continue to be required, and the fluid levels (including engine oil) will need to be checked and adjusted at this time. If the vehicle operation meets the standard criteria for "Special Operating Conditions" such as: driving off-road, on dirt roads, towing a trailer, making repeated short trips under 32 degrees F, or extensive idling, the engine oil must be replaced at 5,000 mile intervals, regardless of oil used.
T-TT-0086-112018-04-02. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ENGINE. 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-TT-0051-102018-04-02. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM; EQUIPMENT:APPLIANCE:AIR CONDITIONER. If a customer states there is an unpleasant odor in the vehicle from the HVAC system, there are various factors that may be involved.
T-TT-0262-132018-04-02. Service bulletin. ENGINE. Due to the improved performance and durability of 0w-20 synthetic oil, Toyota has extended the oil change intervals to 10,000 miles for most vehicles that require this oil. With this change, the following should be noted
T-SB-0144-132018-04-02. Service bulletin. BACK OVER PREVENTION; ENGINE. Some 2012 ? 2013 model year Tacoma vehicles may exhibit a wind whistle type noise from the front of the vehicle. This noise may be coming from the radiator grille where it meets the hood. A radiator grille seal has been developed to address this condition.
T-TT-0262-132018-04-02. Service bulletin. ENGINE. Starting with the 2010 Model Year, Toyota began a gradual transition to the use of synthetic 0w-20 viscosity engine oil. There are multiple benefits of this oil. Due to the improved performance and durability of 0w-20 synthetic oil, Toyota has extended the oil change intervals to 10,000 miles for most vehicle that require this oil.
ZHA_Toyota POL182018-04-02. Service bulletin. ENGINE AND ENGINE COOLING. Warranty Policy Bulletin: Toyota has received reports in which customers have indicated that there is an illumination of the check engine light (Malfunction Indicator Light). This condition can be due to moisture/water in the Air Injection Pumps and/or Air Switching Valves.
ZHA_Dealer Packa2018-04-02. Service bulletin. ENGINE AND ENGINE COOLING. Dealer Package: Toyota has received a number of reports regarding the Air Injection Pumps and/or Air Switching Valves. In these reports, customers have experienced an illumination of the check engine light (Malfunction Indicator Light). This condition can be due to moisture/water in the Air Injection Pumps and/or Air Switching Valves. Although the Air Injection Pumps and Air Switching Valves are covered by Toyota?s New Vehicle Limited Warranty for 3 years or 36000 miles (whichever comes first) and by the California Emission Warranty for 7 years or 70,000 miles (whichever comes first), we at Toyota care about the customers? ownership experience. Toyota is providing coverage for repairs related to the Air Injection Pumps and Air Switching Valves. The following information is provided to inform you and your staff of the program notification schedule and your degree of involvement.
ZHA_Region Lette2018-04-02. Service bulletin. ENGINE AND ENGINE COOLING. Region Letter: Toyota has received a number of reports regarding the Air Injection Pumps and/or Air Switching Valves. In these reports, customers have experienced an illumination of the check engine light (Malfunction Indicator Light). This condition can be due to moisture/water in the Air Injection Pumps and/or Air Switching Valves. Although the Air Injection Pumps and Air Switching Valves are covered by Toyota?s New Vehicle Limited Warranty for 3 years or 36000 miles (whichever comes first) and by the California Emission Warranty for 7 years or 70,000 miles (whichever comes first), we at Toyota care about the customers? ownership experience. Toyota is providing coverage for repairs related to the Air Injection Pumps and Air Switching Valves. The following information is provided to inform you and your staff of the program notification schedule and your degree of involvement.
ZHA_Dealer Daily2018-04-02. Service bulletin. ENGINE AND ENGINE COOLING. Dealer Daily Message: Customer Support Program ZHA Certain 2012 Model Year Tacoma Coverage for Air Injection Pumps and/or Air Switching Valves ? Customer Support Program ZHA Dealer Letter is now available on TIS.
ZHA_Dealer Email2018-04-02. Service bulletin. ENGINE AND ENGINE COOLING. Dealer Email: Toyota has received a number of reports regarding the Air Injection Pumps and/or Air Switching Valves. In these reports, customers have experienced an illumination of the check engine light (Malfunction Indicator Light). This condition can be due to moisture/water in the Air Injection Pumps and/or Air Switching Valves. Although the Air Injection Pumps and Air Switching Valves are covered by Toyota?s New Vehicle Limited Warranty for 3 years or 36000 miles (whichever comes first) and by the California Emission Warranty for 7 years or 70,000 miles (whichever comes first), we at Toyota care about the customers? ownership experience. Toyota is providing coverage for repairs related to the Air Injection Pumps and Air Switching Valves. The following information is provided to inform you and your staff of the program notification schedule and your degree of involvement.
ZHA_Region Email2018-04-02. Service bulletin. ENGINE AND ENGINE COOLING. Region Email: Toyota has received a number of reports regarding the Air Injection Pumps and/or Air Switching Valves. In these reports, customers have experienced an illumination of the check engine light (Malfunction Indicator Light). This condition can be due to moisture/water in the Air Injection Pumps and/or Air Switching Valves. Although the Air Injection Pumps and Air Switching Valves are covered by Toyota?s New Vehicle Limited Warranty for 3 years or 36000 miles (whichever comes first) and by the California Emission Warranty for 7 years or 70,000 miles (whichever comes first), we at Toyota care about the customers? ownership experience. Toyota is providing coverage for repairs related to the Air Injection Pumps and Air Switching Valves. The following information is provided to inform you and your staff of the program notification schedule and your degree of involvement.
F0U_Interim_Deal2017-08-14. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. DL: In the subject vehicles the front catalytic converter internal components may become deteriorated and begin to rattle. If continually operated in this condition, the deteriorated components could become dislodged and restrict the exhaust flow. If this occurs, the vehicle may illuminate a check engine light, and, depending on the level of exhaust restriction, the vehicle may experience a reduction in power. Toyota has developed a new exhaust pipe with catalytic converters to prevent this condition from occurring.
F0U_Interim Regi2017-08-14. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. RL: In the subject vehicles the front catalytic converter internal components may become deteriorated and begin to rattle. If continually operated in this condition, the deteriorated components could become dislodged and restrict the exhaust flow. If this occurs, the vehicle may illuminate a check engine light, and, depending on the level of exhaust restriction, the vehicle may experience a reduction in power. Toyota has developed a new exhaust pipe with catalytic converters to prevent this condition from occurring.
F0U_Updated_Tech2017-08-14. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. TI: In the subject vehicles the front catalytic converter internal components may become deteriorated and begin to rattle. If continually operated in this condition, the deteriorated components could become dislodged and restrict the exhaust flow. If this occurs, the vehicle may illuminate a check engine light, and, depending on the level of exhaust restriction, the vehicle may experience a reduction in power.
F0U_Part Number2017-08-14. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. DL: In the subject vehicles the front catalytic converter internal components may become deteriorated and begin to rattle. If continually operated in this condition, the deteriorated components could become dislodged and restrict the exhaust flow. If this occurs, the vehicle may illuminate a check engine light, and, depending on the level of exhaust restriction, the vehicle may experience a reduction in power. Toyota has developed a new exhaust pipe with catalytic converters to prevent this condition from occurring.
F0U_Interim_Tech2017-08-14. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. TI: In the subject vehicles the front catalytic converter internal components may become deteriorated and begin to rattle. If continually operated in this condition, the deteriorated components could become dislodged and restrict the exhaust flow. If this occurs, the vehicle may illuminate a check engine light, and, depending on the level of exhaust restriction, the vehicle may experience a reduction in power.
T-TT-0262-13 Rev2017-08-14. Service bulletin. ENGINE AND ENGINE COOLING. TT: Starting with 2010 Model Year, Toyota began a gradual transition to the use of synthetic 0w-20 viscosity engine oil. There are multiple benefits of this oil. Due to the them improved performance and durability of 0w-20 synthetic oil, Toyota has extended the oil change intervals to 10,000 miles for most vehicles that require this oil.
T-TT-0262-13 Rev2017-08-14. Service bulletin. ENGINE AND ENGINE COOLING. TT: Starting with 2010 Model Year, Toyota began a gradual transition to the use of synthetic 0w-20 viscosity engine oil. There are multiple benefits of this oil. Due to the them improved performance and durability of 0w-20 synthetic oil, Toyota has extended the oil change intervals to 10,000 miles for most vehicles that require this oil.
T-SB-0044-14 Rev2017-08-01. Service bulletin. EQUIPMENT:ELECTRICAL; ENGINE AND ENGINE COOLING. TSB: Some 2012 - 2014 model year Tacoma vehicles equipped with 1GR-FE engines may exhibit spark knock (detonation) during light acceleration and/or uphill in hot weather (80°F or higher). The Engine Control module/ECM (SAE term: Powertrain Control Module/PCM) logic has been modified to reduce the possibility of this condition occurring.
T-TT-0362-152017-03-28. Service bulletin. ELECTRICAL SYSTEM; ENGINE. TT: 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-0012-13 REV2017-03-21. Service bulletin. ENGINE; ELECTRICAL SYSTEM. "TSB: FLASH REPROGRAMMING ALLOWS THE 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."
F0U_INTERIMD11/32017-03-07. Service bulletin. ENGINE. "DL: IN THE SUBJECT VEHICLES THE FRONT CATALYTIC CONVERTER INTERNAL COMPONENTS MAY BECOME DETERIORATED AND BEGIN TO RATTLE. IF CONTINUALLY OPERATED IN THIS CONDITION, THE DETERIORATED COMPONENTS COULD BECOME DISLODGED AND RESTRICT THE EXHAUST FLOW. IF THIS OCCURS, THE VEHICLE MAY ILLUMINATE A CHECK ENGINE LIGHT, AND, DEPENDING ON THE LEVEL OF EXHAUST RESTRICTION, THE VEHICLE MAY EXPERIENCE A REDUCTION IN POWER. TOYOTA HAS DEVELOPED A NEW EXHAUST PIPE WITH CATALYTIC CONVERTERS TO PREVENT THIS CONDITION FROM OCCURRING."

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