2020 Toyota Tacoma: Engine complaints
Owner-reported issue (NHTSA complaints, not a recall)
Symptoms
NHTSA has 14 owner complaints for the 2020 Toyota Tacoma that list the engine component. Complaints are individual owner reports, not verified defects.
Examples:
- NHTSA complaint ODI #11716242 (filed 02/06/2026): “I am having same issue as the incident i found here 12/06/2025, listed under complaints-i live in rio rancho nm- concern it involves the automatic transmission torque converter specifically torque-converter lock-up behavior, the issue presents as a vibration/shudder during steady -speed driving , we…”
- NHTSA complaint ODI #11712671 (filed 01/22/2026): “Toyota has a manufacturing defect going on with their v6 in gen 3tacoma's. i have a 2020 limited with 48,200 miles that needs a new cylinder head. it threw a check engine light on me, and luckily enough i took it to the dealership within about 30 miles, otherwise my engine could have exploded. i hav…”
- NHTSA complaint ODI #11708785 (filed 01/05/2026): “Vehicle accelerated on its own at highway speed, had to hit the brake in order for it to stop accelerating. other more common issue is that vehicle rpms go up when trying to accelerate but vehicle does not accelerate, just rpms go up. this happened about 5 times over the past year and a half. mos…”
Likely causes
These complaints do not establish a single root cause; read the examples above and get a diagnosis.
Fix, in plain English
No single fix is established by these reports. Check your VIN for open recalls at nhtsa.gov/recalls, ask a dealer about technical service bulletins (TSBs) or extended warranty coverage, then have the system diagnosed.
DIY difficulty: Pro
Internal engine work (lifters, oil consumption, fuel dilution diagnosis) requires engine teardown or dealer software/tests. (Our assessment.)
Cost
No sourced cost range for this issue. Get a written quote after diagnosis.
Typical parts (search links, no affiliate codes)
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Sources
Page last updated .