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 2021 Cadillac CT4 Airbag Warning Lamp May Not Illuminate Consistently (Recall 21V421)?

On certain 2021 Cadillac CT4 vehicles, the communications gateway module can process loss of communication with the sensing and diagnostic module incorrectly, causing inconsistent illumination of the airbag malfunction indicator. 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 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 2020-2024 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.

Cadillac · Known Issues

2020-2025 Cadillac CT4 Problems: 12 Known Issues

2020-2025 model years · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated August 2026

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According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2020-2025 Cadillac CT4 has 12 documented known issues, with 6 rated critical. The most serious 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), Airbag Warning Lamp May Not Illuminate Consistently (Recall 21V421), 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 ($150-$1,600 repair). Across all issues with published estimates, repair costs range from $150 to $5,000. DIY maintenance guides at au7o.io.

Frequently Asked Questions

What are the most common Cadillac CT4 problems?

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2020-2025 Cadillac CT4 has 12 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, 6 are rated critical and should be addressed promptly.

Is the Cadillac CT4 reliable?

The 2020-2025 Cadillac CT4 has 12 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 6 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 Airbag Warning Lamp May Not Illuminate Consistently (Recall 21V421) 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 $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 year Cadillac CT4 is the most reliable?

Reliability varies across model years of the Cadillac CT4. Based on documented issues, problems are most commonly reported in earlier model years. Au7o recommends checking the specific known issues for your target year before purchasing, and having a pre-purchase inspection performed by a qualified mechanic. Our known issues database covers the 2020-2025 Cadillac CT4 with 12 documented issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports.

All 12 Known Issues

Other Cadillac Models

Frequently Asked Questions

What are the most common Cadillac CT4 problems?

Is the Cadillac CT4 reliable?

How much does it cost to fix common Cadillac CT4 problems?

What year Cadillac CT4 is the most reliable?

Airbag Warning Lamp May Not Illuminate Consistently (Recall 21V421)#

Roof-Rail Side-Curtain Airbags May Be Installed Incorrectly (Recall 21V611)#

10-Speed Transmission Damage Can Cause Wheel Lock-Up (Recall 25V148)#

Tremec TR-6060 Manual: Notchy and Grinding Second Gear When Cold#

Daytime Running Lights May Stay On with Headlights (Recall 22V903)#

Electronic Brake-Boost Sensor Contamination Can Remove Assist (Recall 20V588)#

"Steering Assist Reduced" and "Service Driver Assist" Messages from Camera Module Communication Loss#

CT4-V Blackwing LF4 Squeak and Chirp at Low RPM Under Light Throttle#

LSY 2.0T Cam Carrier Cover Sealant Defect Causes Engine Oil Leaks#

Crankcase Pressure Sensor Ices Over in Cold Weather Setting P04FB#

Over-the-Air Update Leaves Modules Awake and Drains the 12-Volt Battery#

Front Strut Popping and Thump Noise Over Small Bumps#