What are the most common Cadillac CT4 problems?
According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2025 Cadillac CT4 has 5 documented issues. The most frequently reported are: Over-the-Air Update Leaves Modules Awake and Drains the 12-Volt Battery, Tremec TR-6060 Manual: Notchy and Grinding Second Gear When Cold, CT4-V Blackwing LF4 Squeak and Chirp at Low RPM Under Light Throttle. None are rated critical, but regular maintenance is recommended.
Is the Cadillac CT4 reliable?
The 2025 Cadillac CT4 has 5 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. No issues are rated critical, suggesting generally good reliability. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common Cadillac CT4 problems?
Repair costs for known Cadillac CT4 issues range from $0 to $5,000, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2025 Cadillac CT4 Over-the-Air Update Leaves Modules Awake and Drains the 12-Volt Battery?
A software defect in the serial data gateway module can leave vehicle modules awake after an over-the-air update completes, so the car never fully goes to sleep. The result is partial or complete 12-volt battery drain — the car will not start after sitting, or starts weakly and t… Repairs typically run $0-$400. Severity: medium.
What is the 2022-2025 Cadillac CT4 Tremec TR-6060 Manual: Notchy and Grinding Second Gear When Cold?
CT4-V Blackwing cars ordered with the six-speed manual use a Tremec TR-6060. Owners consistently report that second gear is high-effort, notchy or outright baulks during the first few upshifts after a cold start, and in colder climates it can be difficult to select second at all… Repairs typically run $200-$5,000. Severity: medium.
What is the 2022-2025 Cadillac CT4 CT4-V Blackwing LF4 Squeak and Chirp at Low RPM Under Light Throttle?
CT4-V Blackwing owners report a rhythmic squeak, chirp or squelching noise that rises in frequency with engine speed, most noticeable pulling away from a stop or under light throttle at low RPM and generally worse once the engine is fully warm. The noise is engine-speed related r… Repairs typically run $150-$3,500. Severity: medium.
What is the 2020-2025 Cadillac CT4 LSY 2.0T Cam Carrier Cover Sealant Defect Causes Engine Oil Leaks?
On the 2.0L turbo LSY four-cylinder used in the CT4 base/Luxury/Premium Luxury/Sport, oil weeps from what appears to be several places at once — the camshaft carrier cover, the engine front cover, the timing chain upper cover, and the lower oil pan. GM's own bulletin traces most… Repairs typically run $450-$1,800. Severity: medium.
What is the 2020-2025 Cadillac CT4 Crankcase Pressure Sensor Ices Over in Cold Weather Setting P04FB?
The LSY 2.0L turbo routes crankcase vapors through a PCV/crankcase pressure sensor mounted in the valve cover area. In cold climates and on short-trip driving, water vapor condenses in the sensor port and hose and then freezes, blocking the reference passage. The ECM sees an impl… Repairs typically run $0-$350. Severity: low.
