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Service bulletins for the 2020 Toyota Avalon

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.

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

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Bulletins, newest first
Toyota Safety Re2020-04-20. Service bulletin. EQUIPMENT. Safety Recall and Service Campaign - Technician Certification Requirements
Toyota Safety Re2020-04-20. Service bulletin. EQUIPMENT. Safety Recall and Service Campaign - Technician Certification Requirements
T-SB-0009-19_Rev2020-04-13. Service bulletin. EQUIPMENT; SERVICE BRAKES; ELECTRICAL SYSTEM. TSB: Long-term or off-site storage requires special care to keep vehicles factory fresh and ready for delivery. The following guidelines should be performed to minimize vehicle component/part degradation due to extended vehicle storage conditions. Long-term storage can affect a vehicle?s systems and components. Any problems that are found should be corrected immediately.
T-SB-0023-202020-04-13. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. TSB: Some 2019 ? 2020 model year Avalon Hybrid, Camry Hybrid, and RAV4 Hybrid vehicles may exhibit a MIL ON condition with a ?Hybrid System Malfunction? message displayed and one or more of the following DTC(s) that represent an over current between the MG1, MG2, and inverter/PCU: ?P1C5D19 ? Drive Motor "A" Inverter Circuit Current Above Threshold ?P1C5F19 ? Generator Inverter Circuit Current Above Threshold These conditions typically occur on low vehicle mileage (less than 5,000). After an occurrence, the vehicle will be able to run normally with no drivability issues. Follow the Repair Procedure in this bulletin to address these conditions
T-SB-0090-19_Rev2020-04-13. Service bulletin. EQUIPMENT:OTHER:LABELS; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ELECTRICAL SYSTEM. TSB: Pre-Delivery Service (PDS) is a critical step in satisfying our new car customers. Customer feedback indicates the following areas deserve special attention when performing PDS: ?Careful inspection for paint chips/scratches and body dents/dings. ?Proper operation of electrical accessories. ?Interior cleanliness. ?Proper function of mechanical systems. Customer retention and proper maintenance of vehicles are and have always been a major focus for Toyota. To help remind customers that regular service is essential to the proper maintenance of the vehicle, dealers are required to install a service reminder sticker before delivery. By doing this, customers will be reminded to return to your dealership for service. Your current service reminder sticker may be used. (See PDS Check Sheet item 9 of ?Final Inspection and Cleaning.?) A new PDS Check Sheet has been developed for the 2020 model year Avalon and Avalon HV. Some check points have been added, expanded, or clarified.
T-SB-0008-19_Rev2020-04-13. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. TSB: An initialization procedure is required to activate the Entune? 3.0 App Suite Connect for Audio, Audio Plus, and Premium Audio head units before they are used for the first time on new vehicles. The initialization procedure may also be performed under other circumstances, such as following a head unit replacement or after the customer?s personal settings are erased. The initialization procedure requires between 3 and 15 minutes to complete, depending on file size, cellular connection speed, and other factors. Following the initialization procedure, individual Entune? 3.0 apps may periodically update through an over-the-air update system. Updates are optional or mandatory. The update procedure will take approximately 1 minute for each app requiring an update. Follow the Initialization/Update Procedure in this bulletin to perform the initialization and app updates.
T-SB-0017-202020-03-30. Service bulletin. PARKING BRAKE. TSB: Some 2019 ? 2020 model year Avalon vehicles may exhibit a Parking Brake Malfunction or Cruise Control Malfunction warning message on the MID (multi-information display) with Diagnostic Trouble Code (DTC) C13B0 (Electric Parking Brake ECU Malfunction) present. Follow the Repair Procedure in this bulletin to address this condition
T-SB-0016-202020-03-30. Service bulletin. FUEL SYSTEM, GASOLINE. TSB: Some 2018 ? 2020 model year North American Produced (NAP) Camry, 2018 ? 2019 model year Japan produced Camry, 2018 ? 2020 model year Camry hybrid, 2019 ? 2020 model year Avalon, and 2019 ? 2020 model year Avalon hybrid vehicles may exhibit a condition in which the fuel filler door is difficult to open when the release button is pressed. This may be caused by the fuel filler door spring not having sufficient stroke to push the fuel filler door to the open position. The fuel filler door spring has been updated. Follow the Repair Procedure in this bulletin to address this condition.
T-TT-0594-20_Rev2020-03-30. Service bulletin. EQUIPMENT:ELECTRICAL. TT: Some vehicles equipped with Dynamic Navigation may experience a pop-up message notifying them that their map update service will end soon. The date that is shown could be more than one year in the future. This does not indicate any issues with the vehicle, and is only informing the user of the expiration date.
Safety Recall an2020-03-30. Service bulletin. EQUIPMENT. Safety Recall and Service Campaign - Technician Certification Requirements
T-SB-0008-19_Rev2020-03-30. Service bulletin. EQUIPMENT. An initialization procedure is required to activate the Entune? 3.0 App Suite Connect for Audio, Audio Plus, and Premium Audio head units before they are used for the first time on new vehicles. The initialization procedure may also be performed under other circumstances, such as following a head unit replacement or after the customer?s personal settings are erased. The initialization procedure requires between 3 and 15 minutes to complete, depending on file size, cellular connection speed, and other factors. Connection to a wireless network is recommended for optimal functionality when downloading software via a smartphone. Download the latest Entune? 3.0 smartphone app on a smartphone. Following the initialization procedure, individual Entune? 3.0 apps may periodically update through an over-the-air update system. Updates are optional or mandatory. The update procedure will take approximately 1 minute for each app requiring an update. Follow the Initialization/Update Procedure in this bulletin to perform the initialization and app updates
19TC06 - FAQ - A2020-02-24. Service bulletin. POWER TRAIN; ENGINE. Frequently Asked Questions: Certain 2020 Model Year Toyota Avalon, and Camry with 2GR-FKS Engine ECU Reprogram. The engine ECU in the involved vehicles includes certain erroneous transmission related calibration values. As a result, this software does not match the version intended to be used on production vehicles.
19TC06 - Dealer2020-02-24. Service bulletin. POWER TRAIN. Dealer Package: The engine ECU in the involved vehicles includes certain erroneous transmission related calibration values. As a result, this software does not match the version intended to be used on production vehicles.
19TC06 - Dealer2020-02-24. Service bulletin. POWER TRAIN. Dealer Package: The engine ECU in the involved vehicles includes certain erroneous transmission related calibration values. As a result, this software does not match the version intended to be used on production vehicles.
19TC06 - Region2020-02-24. Service bulletin. ENGINE; ELECTRICAL SYSTEM. Region Letter: Due to inappropriate ECU programming, fuel consumption may not conform with the certification value. Actual average fuel economy may be negligibly higher than the certification listed on the Vehicle Window Sticker (Monroney Label).
19TC06 - Dealer2020-02-24. Service bulletin. ENGINE; POWER TRAIN. Dealer Email: The engine ECU in the involved vehicles includes certain erroneous transmission related calibration values. As a result, this software does not match the version intended to be used on production vehicles.
19TC06 - Region2020-02-24. Service bulletin. POWER TRAIN; ENGINE. Region Email: The engine ECU in the involved vehicles includes certain erroneous transmission related calibration values. As a result, this software does not match the version intended to be used on production vehicles.
19TC06 - TI - Ca2020-02-24. Service bulletin. ENGINE. Technical Instructions: TECHNICAL INSTRUCTIONS FOR SPECIAL SERVICE CAMPAIGN 19TC06 ENGINE ECU REPROGRAM CERTAIN 2020 CAMRY 2020 AVALON
T-TT-0594-202020-02-24. Service bulletin. EQUIPMENT. TT: Some vehicles equipped with Dynamic Navigation may experience a pop-up message notifying them that their map update service will end soon. The date that is shown could be more than one year in the future. This does not indicate any issues with the vehicle, and is only informing the user of the expiration date.
T-TT-0520-19_Rev2020-02-18. Service bulletin. EQUIPMENT. TT: In certain cases of leaking air conditioning systems, the root cause of the leak is inadvertently overlooked, causing a repeat repair. To improve customer satisfaction and repair A/C system leaks in one dealer visit, Toyota has developed a set of guidelines for evaluating A/C system components.
T-SB-0009-19_Rev2020-02-18. Service bulletin. EQUIPMENT. TSB: REVISION NOTICE January 22, 2020 Rev1: ? The Battery subsection has been updated. Any previous printed versions of this bulletin should be discarded. Long-term or off-site storage requires special care to keep vehicles factory fresh and ready for delivery. The following guidelines should be performed to minimize vehicle component/part degradation due to extended vehicle storage conditions. Long-term storage can affect a vehicle?s systems and components. Any problems that are found should be corrected immediately.
T-SB-0006-19_Rev2020-02-18. Service bulletin. ELECTRICAL SYSTEM. TSB: REVISION NOTICE January 15, 2020 Rev2: ? The entire bulletin has been updated. February 11, 2019 Rev1: ? The Introduction and Every Two Months sections have been updated. Any previous printed versions of this bulletin should be discarded. Hybrid vehicles are equipped with two types of batteries: ? Hybrid Vehicle (HV) battery ? Auxiliary (12V) battery If the hybrid vehicle is put into storage, the State-Of-Charge (SOC) of its HV battery and auxiliary battery will gradually decrease. To prevent the auxiliary battery from becoming discharged during storage, proper maintenance is necessary. Perform the following maintenance service for the HV battery and auxiliary battery. NOTE ? BEFORE disconnecting the auxiliary battery, confirm the shift lever is in the ?P? position and apply the parking brake completely. The shift lever CANNOT be shifted from the ?P? position with the auxiliary battery disconnected. ? If the negative (?) terminal of the auxiliary battery is reconnected, even if the vehicle is powered ON (Ready ON), the hybrid system may NOT start. In this case, depress the brake pedal and press the Power button to start the hybrid system (the Ready light is ON). If the hybrid system still does NOT start (the Ready light is OFF), refer to the Repair Manual.
19TC06 - Dealer2020-02-18. Service bulletin. ELECTRICAL SYSTEM. Dealer Package: 01/14/2020 Instructions included for Op Code usage when no software update is necessary. The engine ECU in the involved vehicles includes certain erroneous transmission related calibration values. As a result, this software does not match the version intended to be used on production vehicles.
T-TT-0596-202020-02-18. Service bulletin. STEERING; SUSPENSION; BACK OVER PREVENTION. TT: Creaking noise during turns (or turning steering wheel) coming from front strut area. 1) Vehicles under 5,000 miles 2) Refer to the attached video as an example of the noise
T-TT-0580-19_Rev2020-02-18. Service bulletin. POWER TRAIN. TT: Currently under investigation. Please contact TAS if you have a vehicle that exhibits a leak from the Transmission Side Cover with no signs of damage or other conditions unrelated to regardless of miles or months in service. If it?s a Sunday or holiday continue with diagnosis and repair, save all parts and details, contact TAS on the next available work day and review details with TAS engineer.

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