Check engine light or misfire

What got replaced

Owners who name the part that was replaced mention the sensor (8 reports).

Recalls and investigations

No recall on the engine covers the 2015 model year as of Sep 9, 2026.

What owners paid

9 of the 58 reports quote a price. Each dot is one quote. The middle half runs $400 to $6,000.

When it happens

The middle half of failures fell between 63,624 and 107,000 miles, from the 35 reports that gave a mileage.

What owners wrote

“Car uses excessive amount of oil! We have had the timing replaced and now it’s stating the P0420 catalyst system efficiency below threshold bank 1.”

Filed Mar 18, 2026

“Excessive oil consumption causes need for engine rebuild or replacement, cylinder head, head gasket, and timing chain repairs”

Filed Sep 11, 2024

“I was driving down interstate and engine failed due to manufacturer malfunction Excessive Oil consumption Defect. I safely pulled off interstate to avoid injury to myself or others due to engine malfunction. There were not any pre warning lamps only post warning lamps.GM dealer determined catastrophic engine failure #2 cylinder misfire. Engine needs replaced.”

Filed Jan 11, 2024

“GM has long known about the oil consumption problem of the 2015 and settle a lawsuit for the 2013. Car issues including engine shutdowns and stalls, spark plug fouling, engine misfires, unexpected loss of power, vehicle “jerking”. Other people had the same issues included fires per blogs about the issues with the 2014-2015.”

Filed Dec 23, 2023

Other problems on this car

• Windshield cracks or distorts 178 reports
• Engine stalls or loses power while driving 98 reports
• Burns oil or oil level rises 79 reports
• Engine failure, knocking or rod bearing 64 reports
• Airbag warning light or recall 37 reports