2023 Toyota Tundra: Vehicle goes in start stop mode after shifting to park
Common wear/failure (not a recall)
Symptoms
Owners of the 2023 Tundra report: vehicle goes in start stop mode after shifting to park. CarComplaints.com lists 1 owner complaints, average mileage 4,000 miles.
NHTSA has 41 owner complaints for the 2023 Tundra in this area. Examples:
- NHTSA complaint ODI #11770361 (filed 10/10/2026): “2023 toyota tundra. on july 20, 2026 and again on september 18, 2026, while driving, the truck suddenly lost power and went into limp mode. the dash showed 'check engine / reduced engine power / visit your dealer' at about 43,440 miles. the truck had to be tow…”
- NHTSA complaint ODI #11761331 (filed 09/01/2026): “The contact owns a 2023 toyota tundra. the contact stated that while starting the vehicle, the check engine, auto start/stop, and another unknown warning light illuminated. the message "grill shutter malfunction low voltage" was displayed. the vehicle was take…”
Likely causes
Sources do not establish a single root cause; diagnosis is needed. Owner-reported fixes are listed below.
Fix, in plain English
Most common owner-reported solutions on CarComplaints.com: none clearly reported. Check for open recalls and extended warranty coverage with a dealer before paying out of pocket.
DIY difficulty: Moderate
Finding and splicing chewed wiring is doable with a multimeter and patience but can be time-consuming; harness replacement is pro work. (Our assessment.)
Cost
No sourced cost range: get a written quote after diagnosis.
Typical parts (search links, no affiliate codes)
AutoZone · O'Reilly · Advance · RockAuto
Sources
- CarComplaints.com: Vehicle goes in start stop mode after shifting to park (2023 Tundra)
- NHTSA complaints API, 2023 Tundra
Page last updated .