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2016 Chevrolet Sonic LTZ 1.4L Exhaust
Posted to GM Engine on 3/6/2025 12 Replies

I am getting a P0420 code on this sonic, replaced the cat with a walker brand that is known to be good. Code came right back, found a few diagnostic trees talking about only using a OEM cat on the 1.4T. Has anyone have this happen before?

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car Vehicle Data

2016 Chevrolet Sonic LTZ

VIN 1G1JE5SB3G
Engine1.4 L / 4 cyl / GAS
Trans6-speed Automatic (Electronic)
DeliveryFuel Injection
AffectedExhaust
Open Help Request

car Vehicle Data

2016 Chevrolet Sonic LTZ

VIN 1G1JE5SB3G
Engine1.4 L / 4 cyl / GAS
Trans6-speed Automatic (Electronic)
DeliveryFuel Injection
AffectedExhaust