The 2022 CT4 is still relatively new, but the 2.7L turbo engine has earned a troubling reputation for catastrophic failures even at low mileage, while the 2.0L turbo is proving far more reliable. Transmission cooling and mount issues appear across both engines.
2.7L Turbo Catastrophic Engine Failure (LSY)
Occasional · high severityTypical onset: 15,000-60,000 mi
Symptoms: sudden loss of power, severe knocking or rattling, metal shavings in oil, check engine light with misfire codes, oil consumption between changes
Fix: Complete engine replacement or rebuild required. Rod bearings fail prematurely, leading to spun bearings and crankshaft damage. GM has issued TSBs but no comprehensive fix. Expect 25-35 hours labor for short block replacement, more for complete rebuild. Many shops won't touch rebuilds on these—recommend factory short block.
Estimated cost: $8,000-15,000
Transmission Oil Cooler Lines Leaking
Common · medium severityTypical onset: 30,000-70,000 mi
Symptoms: transmission fluid spots under vehicle, burnt transmission fluid smell, low fluid warnings, hard shifting when fluid gets low
Fix: Cooler lines corrode or develop cracks at crimp points. Replace both lines as a set—don't chase individual leaks. 2-3 hours labor including fluid refill and system purge.
Estimated cost: $600-900
Transmission Mount Failure
Common · low severityTypical onset: 40,000-80,000 mi
Symptoms: clunking when shifting from park to drive, excessive vibration at idle, drivetrain shudder on acceleration, visible mount separation or fluid leaking from hydraulic mount
Fix: Hydraulic transmission mount wears prematurely, especially with aggressive driving. Straightforward replacement, 1.5-2 hours labor. Always inspect engine mounts at same time—they often fail together.
Estimated cost: $400-650
Fuel Filter Clogging (Premature)
Occasional · medium severityTypical onset: 50,000-90,000 mi
Symptoms: hesitation under acceleration, intermittent rough idle, hard starting when hot, limp mode with fuel pressure codes
Fix: In-tank fuel filter clogs earlier than expected, likely due to fuel quality issues or tank debris. Requires dropping the tank and fuel pump module replacement—filter is not serviceable separately. 3-4 hours labor.
Estimated cost: $800-1,200
Side Curtain Airbag Software Calibration Issue
Rare · high severitySymptoms: airbag warning light, passenger detection system fault, side airbag deployment message on dash
Fix: Recalled issue (NHTSA 22V-672) affecting side curtain airbag deployment logic. Dealer-only software flash, 0.5 hours. Must be addressed—impacts crash safety. Check if your VIN was remedied.
Estimated cost: $0 (recall)
Exterior Lighting Control Module Faults
Occasional · low severitySymptoms: headlights flickering or not turning on, DRL malfunction, auto high-beam not working, lighting system error messages
Fix: Software bug in lighting control module (NHTSA 22V-547 recall). Dealer flash fixes most cases, 0.5 hours. Rare instances require module replacement if hardware failed—3 hours with programming.
Estimated cost: $0-1,200
Buy the 2.0L turbo with confidence, but absolutely avoid the 2.7L—it's a ticking time bomb that can grenade your wallet before 60k miles.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.