2020 Honda Civic: Electrical System complaints
Owner-reported issue (NHTSA complaints, not a recall)
Symptoms
NHTSA has 38 owner complaints for the 2020 Honda Civic that list the electrical system component. Complaints are individual owner reports, not verified defects.
Examples:
- NHTSA complaint ODI #11770226 (filed 10/09/2026): “On september 27, 2026, at approximately 90,800 miles, the body control module (bcm) in my 2020 honda civic hatchback failed. symptoms included the alarm sounding on its own, warning lights illuminating on the dash, the vehicle turning its accessories on unprompted while parked (key fob was present),…”
- NHTSA complaint ODI #11762116 (filed 09/04/2026): “Odometer fraud. the contact purchased a 2020 honda civic. it was discovered that there was a mileage discrepancy. the vehicle was a dealer sale. at the time of purchase, the mileage was 87,000. at the time of registration, it was discovered that the mileage was 247,000.…”
- NHTSA complaint ODI #11760752 (filed 08/30/2026): “The turbocharger bypass control solenoid valve circuit on my 2020 civic si has developed an intermittent open, setting dtc p0035. i diagnosed it myself: the solenoid coil measures 45 ohms and functions when commanded via bi-directional scan tool, and supply voltage is present at the harness connecto…”
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: 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 for this issue. Get a written quote after diagnosis.
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