2020 Honda Civic electrical system problems

Related recalls

No recalls on file.

What owners say

1. Filed Sep 4, 2026247,000 miNJElectrical System

   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 #11762116 · source
2. Filed Aug 30, 2026FLElectrical SystemEngine

   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 connector. However, the control circuit reads approximately 9V in the off state when it should be near ground, and the reading fluctuates when the harness is flexed near the connector —…

   NHTSA complaint #11760752 · source
3. Filed Apr 22, 2026TXElectrical System

   I have owned my vehicle for nearly 18 months and absolutely NO ACTION has been taken on Honda's part to remedy this solution with the capacitor in the circuit board of the front passenger seat weight sensor. Tired of waiting! I want results. This could lead to the front passenger frontal and knee airbags deploying unexpectedly.

   NHTSA complaint #11733043 · source
4. Filed Jan 30, 2026CAElectrical SystemOther / Unknown

   The air conditioning system in my 2020 Honda Civic EX has a refrigerant leak at the evaporator assembly, causing very weak or almost no cooling even when set to the lowest temperature settings. This happens consistently, including in moderate to hot outside temperatures, making the cabin uncomfortably warm during drives as it could get pretty hot in inland southern California. The A/C evaporator assembly is the failed component, and the part remains in the vehicle available…

   NHTSA complaint #11714611 · source
5. Filed Jan 18, 2026CAElectrical System

   vehicle turns on in to accessory mode, does not allow me to turn off vehicle sometimes car turns on at night by itself, alarm goes off when parked and locked

   NHTSA complaint #11711747 · source
6. Filed Sep 30, 2025FLElectrical System

   Q: What component or system failed or malfunctioned, and is it available for inspection upon request? A: BCM (body mechanical module) became faulty, causing car to turn on ignition by itself. Would be sitting in car with it off and the ignition would turn on causing issues with battery and gas consumption. Also in order to save that until it was figured out what was wrong I had to disconnect the battery causing multiple resets to my electrical system. Yes. Q: How was your…

   NHTSA complaint #11690484 · source
7. Filed Jan 4, 2025PAElectrical System

   While driving on interstate highway, main dash display went almost completely dark. Could not see speed, warning lights, gas gauge, engine temp, etc. Pulled over to check out problem and "push to start" button would not turn off engine. It did on second try. Dealer diagnosed fault in gauge control module. Must be replaced.

   NHTSA complaint #11634133 · source
8. Filed Jan 3, 2025CADriver Assistance & Safety TechElectrical System

   The vehicle’s emergency braking system randomly applies the brakes even when the front is not obstructed. Front sensors are kept clear of any debris, dirt, or bugs. I went to Honda of El Cajon in El Cajon, Ca and they could not help me even though the service advisor admitted that another Honda CR-V driver had the same problem the same day. This is a safety concern as my car has applied he brakes while on the freeway and at stop signs at random. Honda has failed to…

   NHTSA complaint #11633970 · source
9. Filed Aug 7, 2024NCCrashTowedBrakesElectrical SystemTransmission & Drivetrain

   I turn my car on To go to work realized I didn’t have my phone. Car was in park. I hadn’t touch the gearshift at all I get out of the car. Approximate 20 seconds after I walk away from the car, my home security camera shows the car creeping extremely slowly backwards up into my driveway going up across the crown of the road… across the street and falls into a 10 foot deep ditch. I am 100% certain that Car was in Park… There were no sounds when I open the door to alert me…

   NHTSA complaint #11606960 · source
10. Filed Jul 23, 2024CAElectrical System

    The AC condenser has been replaced twice along with the shaft seal.Which then caused my evaporator core to crack and is now leaking and gonna cost me two thousand dollars

    NHTSA complaint #11603986 · source
11. Filed Jun 21, 202451,815 miTXBrakesElectrical SystemVisibility & Wipers

    The contact owns a 2020 Honda Civic. The contact stated while driving 55 MPH, the vehicle came to an abrupt stop. The contact was concerned that the parking brake had engaged without driver input. The contact stated that after closing the windows, turning off the vehicle, and exiting the vehicle, she noticed that the windows and sunroof had opened independently upon her return. There were no warning lights illuminated. The contact called the local dealer, but the vehicle was…

    NHTSA complaint #11595726 · source
12. Filed Jun 14, 2024NYDriver Assistance & Safety TechElectrical SystemFuel, Hybrid & EV Propulsion

    Gas door opens randomly and it’s happened more than a few times now which is becoming a safety hazard especially because I drive 80 miles daily for work. Also my automatic brake senor is a hazard because it’s going off when cars or objects are farther away; which leads to the 3rd issue with my seat belts which is either to tight on the chest area and possibly choking me when the car automatically brakes when objects aren’t near or in close distance to my car

    NHTSA complaint #11594495 · source

Source: U.S. National Highway Traffic Safety Administration (NHTSA) Office of Defects Investigation public data. Complaints are submitted by owners and are not verified by NHTSA or by us; a complaint does not prove a defect exists. View this vehicle on NHTSA.gov Methodology