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2020 Honda Civic Si 1.5L Hesitation, Surge, MIL Lamp on
Posted to Asian Driveability on 7/21/2025 7 Replies

The repair history preety much sums up all I know at this time I suspect a possible plugged cat but don't have tools to chek backpressure any suggestions appreciated.

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car Vehicle Data

2020 Honda Civic Si

VIN 2HGFC3A56L
Engine1.5 L / 4 cyl / GAS
Trans6-speed Standard
DeliveryFuel Injection / direct injection turbocharged
EmissionsOBD-II Compliant
SymptomsHesitation, Surge, MIL Lamp On
OccursHot, on Accel
Misc.P0299

Trouble Codes

P0299Turbocharger Underboost Problem
Open Help Request

car Vehicle Data

2020 Honda Civic Si

VIN 2HGFC3A56L
Engine1.5 L / 4 cyl / GAS
Trans6-speed Standard
DeliveryFuel Injection / direct injection turbocharged
EmissionsOBD-II Compliant
SymptomsHesitation, Surge, MIL Lamp On
OccursHot, on Accel
Misc.P0299

Trouble Codes

P0299Turbocharger Underboost Problem