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Service bulletins for the 2020 Toyota Corolla

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.

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

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Bulletins, newest first
T-TT-0442-17_Rev2019-12-16. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). TT: Safety Connect is a vehicle option which requires a subscription fee for the system to be active after the initial trial period. Once the subscription has expired the DCM (Telematics Transceiver) will be in an inactive state. In some instances, a DCM may need to be replaced even though the customer is not using the service. If registration of the replacement DCM part is attempted using the Techstream utility after the account has become inactive, the registration will fail, and messages such as ?ATX webserver is Down? or ?ATX error? will be displayed.
T-SB-0160-192019-12-16. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM); ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY. TSB: Some 2019 model year Avalon and Avalon Hybrid vehicles equipped with Entune? Audio Plus (version 1002) or Entune? Premium Audio (version 1002) or earlier may exhibit one or more of the following conditions: ? Incorrect GPS date and time ? Abnormal Bluetooth® operation ? Abnormal Wi-Fi operation ? Microphone remains on screen after voice recognition failure ? Unable to see text with headlights on (text is same color as background)
T-TT-0572-19_Rev2019-12-02. Service bulletin. EQUIPMENT. TT: Some 2020 model year Camry, Camry HV and Corolla Hatchback vehicles equipped with a DCM may exhibit a B15A8** DTC in history during PDS. This DTC can be triggered during the manufacturing and /or shipping process and does not indicate a problem with the vehicle. To simplify the diagnosis of this DTC, refer to the procedure below to prevent unnecessary parts replacement.
T-TT-0578-192019-12-02. Service bulletin. STEERING. TT: Some customers may encounter Bluetooth® connectivity concerns such as: ? Difficulty to pair the phone. ? Intermittent Bluetooth® failure to connect to the vehicle when first turning on the vehicle. ? Various Bluetooth® Audio functions are no longer functioning with customer?s phone such as 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-TT-0572-192019-10-21. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. TT: Some 2020 model year Camry, Camry HV and Corolla Hatchback vehicles equipped with a DCM may exhibit a B15A8** DTC in history during PDS. This DTC can be triggered during the manufacturing and/or shipping process and does not indicate a problem with the vehicle. To simplify the diagnosis of this DTC, refer to the procedure below to prevent unnecessary parts replacement.
T-TT-0575-192019-10-15. Service bulletin. EQUIPMENT. TT: Some new vehicles may experience the SOS/Telematics functions inoperative during Pre-Delivery Inspection or after replacement. The following procedure outlines the process to activate the DCM with the cellular network. To begin the process below, move the vehicle to an area with cell reception.
T-SB-0098-192019-09-16. Service bulletin. ENGINE AND ENGINE COOLING. TSB: Some 2018 - 2019 model year C-HR (equipped with a 3ZR-FAE engine) and 2020 model year Corolla (equipped with a 2ZR-FAE engine) vehicles may exhibit a MIL ON condition with one or more of the following Diagnostic Trouble Codes (DTCs): * P2646 (A Rocker Arm Actuator System Performance or Stuck Off [Bank 1]) * P265B (B Rocker Arm Actuator Position Sensor Circuit Range Performance [Bank 1]) * P10A0 (Valvematic Angle Difference [CSS]) * P1055 (Valvematic Angle Difference [ECU]) Follow the Repair Procedure in this bulletin to address this condition.
T-TT-0553-192019-09-03. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. TT: The new DCA-8000 Diagnostic Charger may cause your facility?s Ground Fault Circuit Interrupter (GFCI) breaker to trip. A GFCI breaker can be tripped for various reasons, one of the reasons may be related to the DCA-8000. We are investigating this issue to determine the root cause. Other reasons the GFCI breaker may trip ? Circuit demand is too high for GFCI rating ? Worn out GFCI internal contacts ? Improper installation or wiring of GFCI breaker
T-SB-0158-18-Rev2019-09-03. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY. TSB: REVISION NOTICE July 03, 2019 Rev1: ? Applicability has been updated to include 2020 model year Supra vehicles. ? The Hook and Loop Style section has been added. Any previous printed versions of this bulletin should be discarded. 2020 model year Toyota vehicles are equipped with driver side floor mat retainers to secure the floor mat in the correct position. In addition, some models may also utilize retainers for passenger side and rear seat floor mats. During Pre-Delivery Service (PDS), follow the appropriate Installation Procedure to attach the driver side, and if applicable, the passenger side and rear seat floor mats to the vehicle carpet using the floor mat retainers. If installation instructions are included in the floor mat kit, place the instructions in the vehicle?s glove box for customer reference. CAUTION ? ALWAYS verify the floor mat is designed specifically for the model and model year it is being installed in. ? ONLY use floor mats that can be secured using the retainers. ALL OEM Toyota floor mats are specifically designed to fit correctly and be secured using the retainers. ? Make sure the floor mat is properly placed on the vehicle carpet and secured with the retainers. If the driver side floor mat is NOT properly placed and secured, it could slip and interfere with the movement of the pedals during driving and may cause an accident. ? Verify the operation of the accelerator, brake, and clutch (if equipped) pedals and clearance to the mat. ? NEVER install more than one floor mat at a time in the driver?s seating position. ? If applicable, ANY secondary set of floor mats (based upon customer preference, such as the all-weather floor mats or other floor mats) MUST be placed in the trunk with ALL the packaging material intact. Do NOT install the secondary mat on top of the primary floor mat already installed in the driver?s seating position.
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
T-TT-0551-192019-07-15. Service bulletin. EQUIPMENT. TT: Some customers may experience an Entune? update pop-up message after every key cycle.
T-TT-0549-192019-07-15. Service bulletin. ELECTRICAL SYSTEM. TT: The new 12V Battery Warranty Testers (DSS-5000 & DCA-8000) require certain information to generate a test result and warranty code. Below is an explanation of what information is required when testing a 12V battery on the new Warranty Battery Testers.
T-TT-0552-192019-07-15. Service bulletin. EQUIPMENT; ENGINE. TT: When repairing a 1234YF HVAC system on a gas powered (Non-Hybrid) Toyota and the addition of compressor oil is required to complete the repairs, the various 1234YF compressor oils (ND-12, PS-D1, or VC100YF) are available through the Toyota Approved Dealer Equipment website.
T-SB-0073-192019-07-15. Service bulletin. STRUCTURE; EQUIPMENT. TSB: TMNA Accessory Sales and Marketing has developed a Toyota paint protection film (PPF) decal (treated with a specially developed light adhesive) for 2019 ? 2020 model year Toyota vehicles. The decal comes in two sizes (2.8 in. x 8 in. and 4 in. x 8 in.) for small and large hoods and will be applied to the top of PPF for all series at TLS accessory installation facilities. The decal is intended to stay affixed to the film until delivery detail/wash. Just before customer delivery, follow the procedure in this Service Bulletin to remove the decal and any residue left by the adhesive.
T-SB-0064-18_Rev2019-07-15. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. TSB: REVISION NOTICE June 17, 2019 Rev1: ? Applicability has been updated to include 2019 ? 2020 model year Corolla Hatchback, RAV4, and RAV4 Hybrid and 2020 model year Corolla and Corolla Hybrid vehicles. ? The Required Tools & Equipment section has been updated. Any previous printed versions of this bulletin should be discarded. The Immobilizer and Smart Key Reset is a feature that allows the registration of new keys when all master keys are lost. Once the system is reset, all previously registered keys will be erased and can never be reused. Another feature, Add/Remove Key, is also available. Once a key is removed, it can never be reused. Follow the procedures in this bulletin to reset a vehicle Immobilizer or Smart Key system and to add and/or remove a key. NOTICE When performing a Smart Code Reset, ALL registered keys are erased and CANNOT be used again on ANY vehicle. For Undesignated Key Permanent Erasure utility, ONLY the keys that are NOT present will be removed. ANY keys that are NOT present can never be reused.
T-TT-0548-192019-07-15. Service bulletin. EQUIPMENT. TT: 1. Reports of missing glove compartment door stopper [PN - 55054-47010] 2. Reports related to glove compartment door opening too fast
T-SB-0143-18_Rev2019-07-15. Service bulletin. EQUIPMENT. TSB: REVISION NOTICE June 07, 2019 Rev2: ? The Software Update Information and Software Update Procedure sections have been updated. May 15, 2019 Rev1: ? Applicability has been updated to include 2019 model year C-HR, Camry, Camry Hybrid, Corolla Hatchback, RAV4, and RAV4 Hybrid and 2020 model year Corolla and Corolla Hybrid vehicles. ? The entire bulletin has been updated. Any previous printed versions of this bulletin should be discarded. Some 2019 model year Avalon and Avalon Hybrid vehicles equipped with Entune? 3.0 Audio Plus (version 1002) or Entune? 3.0 Premium Audio (version 1002) or earlier may exhibit one or more of the following conditions: ? Incorrect GPS date and time ? Abnormal Bluetooth® operation ? Abnormal Wi-Fi operation ? Microphone remains on screen after voice recognition failure ? Unable to see text with headlights on (text is same color as background)
T-SB-0143-18-Rev2019-07-08. Service bulletin. EQUIPMENT. TSB: REVISION NOTICE May 15, 2019 Rev1: ? Applicability has been updated to include 2019 model year C-HR, Camry, Camry Hybrid, Corolla Hatchback, RAV4, and RAV4 Hybrid and 2020 model year Corolla and Corolla Hybrid vehicles. ? The entire bulletin has been updated. Any previous printed versions of this bulletin should be discarded. Some 2019 model year Avalon and Avalon Hybrid vehicles equipped with Entune? 3.0 Audio Plus (version 1002) or Entune? 3.0 Premium Audio (version 1002) or earlier may exhibit one or more of the following conditions: ? Incorrect GPS date and time ? Abnormal Bluetooth® operation ? Abnormal Wi-Fi operation ? Microphone remains on screen after voice recognition failure ? Unable to see text with headlights on (text is same color as background)
T-TT-0537-192019-05-13. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; VISIBILITY; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; LANE DEPARTURE. TT: The blind spot monitor (BSM) sensor angle inspection is used to confirm that the BSM sensor is within the specified angle before performing axis beam adjustment. When used in conjunction with the repair manual, these BSM tips leverage SSTs and readily available tools to support sensor angle confirmation in varying shop environments.
T-TT-0536-192019-05-13. Service bulletin. SUSPENSION. TT: Alignment specifications for some 2019 and 2020 new model vehicles have been updated and are significantly different from the previous model.
T-TT-0531-192019-04-15. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM. TT: Some 2020 model year Japan built Corolla vehicles may exhibit a condition where the battery may become depleted during shipping. It has been discovered that when the D/C cut fuse is not installed voltage may continue to flow to an ECU while the vehicle is powered off causing a parasitic draw depleting battery state of charge.
T-TT-0468-17-Rev2019-03-25. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. TT: HVAC drain tube is found to be blocked/clogged.
T-SB-0006-19_Rev2019-03-18. Service bulletin. EQUIPMENT; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. TSB: REVISION NOTICE 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.
T-SB-0011-192019-02-19. Service bulletin. STRUCTURE. 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 (including interior light, clock, and radio reset). 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 8 of Final Inspection and Cleaning.) A new PDS Check Sheet has been developed for the 2020 model year Corolla, Corolla HV, and Corolla Hatchback. Some check points have been added, expanded, or clarified. Bulletins are available for items in bold type.
TSB-0009-192019-02-19. Service bulletin. EQUIPMENT. 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.

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