{"nhtsa_id":10201766,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-10-02","date":"2021-09-27","document_id":"01-011-21-3800a","mfr_campaign":null,"replaces":null,"component":"EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"Some customers may experience the CHECK ENGINE light ON with DTC P0126:00 (Thermostat stuck open) and one or more of the following symptoms: The engine takes longer to warm up, The engine temperature gauge fluctuates, The low coolant temperature indicator (blue) light stays on longer or comes on while driving, Poor heater performance, especially at idle. NOTE: Vehicles with SKYACTIV-G 2.5T are not applicable. Due to production variety of the failsafe thermostat integrated in the coolant control valve, engine coolant may enter into a dry hollow in the failsafe thermostat, resulting in unintended opening of the failsafe thermostat at lower temperatures (104-176 °F (40-80 °C)). To eliminate this concern, the production process of the coolant control valve has been modified.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10201766-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10201766-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10201766","components":[{"id":"engine","name":"Engine","parent":null},{"id":"equipment","name":"Equipment and accessories","parent":null}],"codes":["P0126"],"topics":[],"vehicles":[{"make":"MAZDA","model":"CX-3","year_from":2019,"year_to":2021,"match":"exact","vehicle_ids":["2019_mazda_cx-3","2020_mazda_cx-3","2021_mazda_cx-3"]},{"make":"MAZDA","model":"CX-30","year_from":2020,"year_to":2021,"match":"exact","vehicle_ids":["2020_mazda_cx-30","2021_mazda_cx-30"]},{"make":"MAZDA","model":"CX-5","year_from":2018,"year_to":2021,"match":"exact","vehicle_ids":["2018_mazda_cx-5","2019_mazda_cx-5","2020_mazda_cx-5","2021_mazda_cx-5"]},{"make":"MAZDA","model":"MAZDA3","year_from":2019,"year_to":2021,"match":"exact","vehicle_ids":["2019_mazda_mazda3","2020_mazda_mazda3","2021_mazda_mazda3"]},{"make":"MAZDA","model":"MAZDA6","year_from":2019,"year_to":2021,"match":"exact","vehicle_ids":["2019_mazda_mazda6","2020_mazda_mazda6","2021_mazda_mazda6"]}],"as_of":"2026-10-19","note":"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.","attribution":[]}