{"nhtsa_id":10186848,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-02-06","date":"2021-01-06","document_id":"NTB21-001","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"2020-2021 TITAN/TITAN XD; TCM COMMUNICATION ERROR CAUSING A NO START CONDITION IF YOU CONFIRM The customer states the engine will not crank and will not start. (The incident may be intermittent.) And There is a U0101 DTC (Lost Comm TCM) in the Engine Control Unit (ECU) and/or the Shifter Control Unit (SCU). This DTC may be in a PAST or CURRENT status. Or The TCM shows “UNKWN” in the PRESENT column or “0” in the PAST column under the CAN DIAG SUPPORT MNTR tab within the ECU (ENGINE) or the SCU (SHIFT) in CONSULT-III PLUS (C-III plus). See Figure 1 and Figure 2.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10186848-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10186848-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10186848","components":[{"id":"engine","name":"Engine","parent":null}],"codes":["U0101"],"topics":[],"vehicles":[{"make":"NISSAN","model":"TITAN","year_from":2020,"year_to":2021,"match":"exact","vehicle_ids":["2020_nissan_titan","2021_nissan_titan"]},{"make":"NISSAN","model":"TITAN XD","year_from":2021,"year_to":2021,"match":"base","vehicle_ids":["2021_nissan_titan"]}],"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":[]}