2020 Honda Civic engine problems
12 owner complaints filed with NHTSA name the engine on the 2020 Honda Civic — 5% of all complaints for this model year.
What owners report
“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…”
filed Aug 30, 2026
“I received an email from Honda regarding a safety recall, stating that the defective part is now available. However, when I called different Honda dealerships, they told me to disregard the notice because the part is not available. If the repair cannot be done, I am concerned why Honda sent the…”
filed Aug 14, 2025
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
Dealer Message - Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience overheating, coolant loss, misfire, and/or DTCs P0300 through P0304 stored.
AEBM08262026901 · Other · issued Aug 26, 2026Service Bulletin - Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience overheating, coolant loss, misfire and/or DTCs P0300 thru P0304 stored.
A26-009 · Service Bulletin/Repair Instructions · issued Aug 26, 2026Service Bulletin - Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience overheating, coolant loss, misfire and/or DTCs P0300 thru P0304 stored.
A26-008 · Service Bulletin/Repair Instructions · issued Aug 26, 2026Service Bulletin - Oil leak at timing chain tensioner inspection cover due to possible insufficient sealant adhesion on inspection cover.
A25-076 · Service Bulletin/Repair Instructions · issued Jul 29, 2025
Engine problems in other Civic years
| Year | Reports | Share |
|---|---|---|
| 2026 Civic | 5 | 18% |
| 2025 Civic | 4 | 6% |
| 2024 Civic | 3 | 2% |
| 2023 Civic | 8 | 3% |
| 2022 Civic | 11 | 1% |
| 2021 Civic | 5 | 3% |
| 2019 Civic | 31 | 7% |
| 2018 Civic | 57 | 8% |
| 2017 Civic | 66 | 11% |
| 2016 Civic | 95 | 9% |
| 2015 Civic | 31 | 8% |
| 2014 Civic | 23 | 8% |
Other reported problem areas on the 2020 Honda Civic
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.