What are the most common Cadillac CT4 problems?
According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2020 Cadillac CT4 has 8 documented issues. The most frequently reported are: Daytime Running Lights May Stay On with Headlights (Recall 22V903), 10-Speed Transmission Damage Can Cause Wheel Lock-Up (Recall 25V148), Electronic Brake-Boost Sensor Contamination Can Remove Assist (Recall 20V588). Of these, 5 are rated critical and should be addressed promptly.
Is the Cadillac CT4 reliable?
The 2020 Cadillac CT4 has 8 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 5 issues are rated critical: Daytime Running Lights May Stay On with Headlights (Recall 22V903) and 10-Speed Transmission Damage Can Cause Wheel Lock-Up (Recall 25V148) and Electronic Brake-Boost Sensor Contamination Can Remove Assist (Recall 20V588) and Roof-Rail Side-Curtain Airbags May Be Installed Incorrectly (Recall 21V611) and "Steering Assist Reduced" and "Service Driver Assist" Messages from Camera Module Communication Loss. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. 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 $1,800, 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 2020-2023 Cadillac CT4 Daytime Running Lights May Stay On with Headlights (Recall 22V903)?
On certain 2020-2023 Cadillac CT4 vehicles, the daytime running lights may not deactivate when the headlights are on, creating excess glare and failing FMVSS 108. Severity: high.
What is the 2020-2021 Cadillac CT4 10-Speed Transmission Damage Can Cause Wheel Lock-Up (Recall 25V148)?
Certain 2020-2021 Cadillac CT4 vehicles equipped with a 10-speed transmission can develop internal transmission damage that may cause the wheels to lock while driving. Severity: high.
What is the 2020 Cadillac CT4 Electronic Brake-Boost Sensor Contamination Can Remove Assist (Recall 20V588)?
On certain 2020 Cadillac CT4 vehicles, contamination at a sensor connection can interrupt communication with the electronic brake-boost system and remove brake assist, requiring extra pedal force. Severity: high.
What is the 2020-2022 Cadillac CT4 Roof-Rail Side-Curtain Airbags May Be Installed Incorrectly (Recall 21V611)?
On certain 2020-2022 Cadillac CT4 vehicles, the roof-rail side-curtain airbags may not have been installed correctly and may deploy improperly in a crash. Severity: high.
What is the 2020 Cadillac CT4 "Steering Assist Reduced" and "Service Driver Assist" Messages from Camera Module Communication Loss?
Early CT4s display a recurring driver information center warning reading 'Steering Assist is Reduced - Drive With Care', often together with 'Service Driver Assist', a check engine light, and loss of lane keep assist and other ADAS features. In many cases steering effort is genui… Repairs typically run $150-$1,600. Severity: high.
What is the 2020-2024 Cadillac CT4 Front Strut Popping and Thump Noise Over Small Bumps?
CT4 owners across trims report a distinct pop, thump or creak from one or both front corners when crossing driveway dips, manhole covers, speed bumps, or during sharp low-speed steering maneuvers. The Alpha 2 front suspension uses a double-pivot strut arrangement, and the noise h… Repairs typically run $400-$1,300. 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.
