2018 Honda Accord: Engine complaints
Owner-reported issue (NHTSA complaints, not a recall)
Symptoms
NHTSA has 608 owner complaints for the 2018 Honda Accord that list the engine component. Complaints are individual owner reports, not verified defects.
Examples:
- NHTSA complaint ODI #11769767 (filed 10/07/2026): “The car hesitates upon acceleration and when it “misses” enough it will flash the engine on the dashboard, and not allow any further acceleration, going into “limp mode”. all the safety controls error on the message center and dashboard warnings all come on, even though it’s only the acceleration/…”
- NHTSA complaint ODI #11769208 (filed 10/06/2026): “The car was rough upon idle one day and all the lights came on and systems went down i was bout to drive to a place where the code was read that’s when i first discovered this was a known issue which this model. head gaket…”
- NHTSA complaint ODI #11769157 (filed 10/05/2026): “The contact owns a 2018 honda accord. the contact stated that on several occasions at start-up several unknown warning lights remained illuminated. the dealer cleared the warning lights and the contact stated that during the failure the safety features disengaged. the vehicle was taken to the dealer…”
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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