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Cadillac · Known Issues

2015 Cadillac CTS Problems: 4 Known Issues

2015 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated September 2026

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Issue summary

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2015 Cadillac CTS has 4 documented known issues, with 1 rated critical. The most serious is Brake-Pedal Pushrod Bracket May Fracture (Recall 15V358). Across all issues with published estimates, repair costs range from $200 to $1,500. DIY maintenance guides at au7o.io.

In This Article

  • CTS Brakes1
  • CTS Engine1
  • CTS Interior1
  • CTS Electrical1
  • Recalls5
  • FAQ
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In This Article

  • Brakes1
  • Engine1
  • Interior1
  • Electrical1
  • Recalls5
  • FAQ

All 4 Known Issues

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ALL YEARS20192018201720162015201420132012201120102009200820072006200520042003

On the 2015 Cadillac CTS, on certain 2015 Cadillac CTS vehicles, the bracket between the brake-pedal assembly and the brake-actuating rod may fracture during normal pedal operation, preventing the driver from applying the brakes.

Common Symptoms

  • Open safety recall
  • Brake-pedal linkage failure risk

How to Fix

Check the VIN and recall completion history. Cadillac dealers inspect the bracket and replace affected brackets under recall 15V358.

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Research This Issue

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NHTSA Verified
High ConfidenceVerifiedReviewed Jul 2026

On the 2014-2019 Cadillac CTS 2.0L I4 turbo LTG, the 2.0L LTG turbocharged four in the third-generation CTS is direct-injected, so no fuel ever washes across the back of the intake valves. Oil vapor drawn in through the PCV system bakes onto the valve stems and seats and builds a hard carbon crust that chokes airflow. The result appears gradually as a rough or lumpy cold idle, a stumble under light throttle, misfire codes and a measurable loss of power and fuel economy - typically becoming noticeable somewhere past 60,000-80,000 miles, sooner on cars driven in short trips. Owners on Cadillac Owners Forum also report oil pooling in the intake plenum at the PCV connection, which accelerates the deposit rate. This is a direct-injection design characteristic, not a defect covered by any recall, and it is specific to the DI engines - it should not be conflated with the V6 timing chain story.

This issue also affects: Buick LeSabre, Buick Park Avenue, Buick Cascada

Common Symptoms

  • Rough or shaky idle, worst when cold
  • Hesitation or stumble under light acceleration
  • Misfire codes on one or more cylinders
  • Noticeable drop in fuel economy and power
  • Oil found in the intake plenum near the PCV connection

How to Fix

Confirm with a borescope through an injector or intake port before spending money - carbon deposits are visible directly. The effective cleaning method is mechanical walnut-shell blasting of the intake ports with the manifold removed; chemical intake cleaners and fuel additives do not reach the valve backs on a DI engine. Inspect the PCV system and clean any oil accumulation in the plenum at the same time, and consider an oil catch can to slow re-accumulation. Plan on repeating the service roughly every 60,000-80,000 miles.

Typical repair cost:$400 - $1,000

Research This Issue

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Community Reported
Medium ConfidenceVerifiedReviewed Aug 2026

On the 2014-2019 Cadillac CTS, the Cadillac User Experience (CUE) capacitive touchscreen fitted to CTS models from 2013 onward suffers separation of the bonded layers behind the glass. The screen develops a spiderweb of hairline cracks radiating from the edges, then stops responding to touch or begins registering phantom presses that change radio stations and climate settings on their own. Because CUE controls climate, audio and phone with no redundant hard buttons, a failed screen disables a large part of the car's controls. GM issued its first dealer bulletin on delamination in December 2014 and multiple preliminary information bulletins followed (PIC6055 and revisions). GM never issued a recall or a reimbursement campaign, and a class-action lawsuit over the defective screens was filed in 2019.

Common Symptoms

  • Hairline cracks spidering out from the edges of the touchscreen
  • Screen does not respond to touch in some areas
  • Phantom or ghost touches changing settings by themselves
  • Bubbling or separation visible under the glass
  • Climate and audio controls unusable

How to Fix

Dealers will normally replace the CUE display under the 4yr/50k bumper-to-bumper warranty when the delamination is visible, so check warranty status first. Out of warranty, a new GM display assembly is the most expensive route; several specialist rebuilders sell a replacement touch-panel/display service for a fraction of dealer cost, and the unit is removable by the owner. Replacing the screen with an updated panel resolves the phantom-touch behavior; software resets do not.

Typical repair cost:$300 - $1,500

Research This Issue

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Community Reported
High ConfidenceVerifiedReviewed Aug 2026

On the 2008-2015 Cadillac CTS, cTS models fitted with high-intensity discharge headlamps use a separate ballast/igniter module mounted low in the headlamp housing. The housing takes on water - through a failed seal, a cracked lens or a missing bulb cap - and the water pools directly on the ballast, corroding it. The result is one headlamp that flickers, cycles on and off, or goes out entirely, which owners almost always misdiagnose as a burned-out HID bulb. On cars with the adaptive (swiveling) headlamp option, the same water intrusion also attacks the horizontal-aim motor and its control circuit, setting adaptive-headlamp codes. Replacement requires bumper cover removal on the CTS, which is what makes the job expensive.

Common Symptoms

  • One headlamp flickers or cycles on and off
  • One HID headlamp completely dark while the other works
  • Headlamp works when cold then quits when warm
  • Moisture or standing water visible inside the headlamp housing
  • Adaptive headlamp warning or B1461/B1462 codes

How to Fix

Swap the suspect bulb into the good side first - if the fault follows the housing rather than the bulb, the ballast is the culprit. Before installing a new ballast, find and fix the water source: reseal the lens, replace missing or cracked bulb access caps, and confirm the housing drains. The OEM ballast is plug-and-play and needs no programming, so a good used GM unit is a common cost-saving route. If adaptive-headlamp codes are present, inspect the leveling/aim motor for the same corrosion.

Typical repair cost:$200 - $900

Research This Issue

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Community Reported
Medium ConfidenceVerifiedReviewed Aug 2026
NHTSA Recalls5 recalls

STEERING:ELECTRIC POWER ASSIST SYSTEM

General Motors LLC (GM) is recalling certain 2016-2018 Cadillac CTS, and 2017 Cadillac ATS, Chevrolet Camaro, and Chevrolet Corvette vehicles. The electric power steering (EPS) assist system may fail.

Campaign #19V08600007/02/2019

STEERING:ELECTRIC POWER ASSIST SYSTEM

General Motors LLC (GM) is recalling certain 2016-2018 Cadillac CTS, 2017-2018 Cadillac ATS, Chevrolet Camaro, and Chevrolet Corvette vehicles. The electric power steering (EPS) assist may fail.

Campaign #25V17500020/03/2025

SEATS:FRONT ASSEMBLY:SEAT HEATER/COOLER

General Motors LLC (GM) is recalling certain 2014-2016 Cadillac CTS vehicles, equipped with heated front seats. The flexible heating mats in the front seats may be damaged over time, resulting in the seat heaters producing excessive heat.

Campaign #18V59500007/09/2018
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Other Cadillac Models

Cadillac XTS30Cadillac CT524Cadillac Escalade20Cadillac Lyriq19Cadillac XT617Cadillac CT617

Frequently Asked Questions

What are the most common Cadillac CTS problems?

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2015 Cadillac CTS has 4 documented issues. The most frequently reported are: Brake-Pedal Pushrod Bracket May Fracture (Recall 15V358), Carbon Buildup on Intake Valves of the 2.0L LTG Turbo (Direct Injection), CUE Touchscreen Delaminates and Becomes Unresponsive or 'Ghost Touches'. Of these, 1 is rated critical and should be addressed promptly.

Is the Cadillac CTS reliable?

The 2015 Cadillac CTS has 4 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 1 issue is rated critical: Brake-Pedal Pushrod Bracket May Fracture (Recall 15V358). 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 CTS problems?

Repair costs for known Cadillac CTS issues range from $200 to $1,500, 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 2015 Cadillac CTS Brake-Pedal Pushrod Bracket May Fracture (Recall 15V358)?

On certain 2015 Cadillac CTS vehicles, the bracket between the brake-pedal assembly and the brake-actuating rod may fracture during normal pedal operation, preventing the driver from applying the brakes. Severity: high.

What is the 2014-2019 Cadillac CTS Carbon Buildup on Intake Valves of the 2.0L LTG Turbo (Direct Injection)?

The 2.0L LTG turbocharged four in the third-generation CTS is direct-injected, so no fuel ever washes across the back of the intake valves. Oil vapor drawn in through the PCV system bakes onto the valve stems and seats and builds a hard carbon crust that chokes airflow. The resul… Repairs typically run $400-$1,000. Severity: medium.

Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.

Data compiled from NHTSA recalls, manufacturer TSBs, automotive forums, and AI-assisted research. No aggregated owner-report counts available for this vehicle yet.

AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR MODULE

General Motors, LLC (GM) is recalling certain 2015 Cadillac Escalade, Escalade ESV, XTS, 2015-2016 Cadillac ATS, CTS, and SRX vehicles. The front-driver air bag inflator may rupture during deployment.

Campaign #26V32900021/05/2026

SERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES

General Motors LLC (GM) is recalling certain model year 2015 Cadillac ATS and CTS vehicles. The affected vehicles have a bracket between the brake pedal assembly and the rod that actuates the brakes that may fracture during normal brake pedal operation.

Campaign #15V35800009/06/2015

Enter your VIN at NHTSA.gov to check recalls specific to your vehicle.

What is the 2014-2019 Cadillac CTS CUE Touchscreen Delaminates and Becomes Unresponsive or 'Ghost Touches'?

The Cadillac User Experience (CUE) capacitive touchscreen fitted to CTS models from 2013 onward suffers separation of the bonded layers behind the glass. The screen develops a spiderweb of hairline cracks radiating from the edges, then stops responding to touch or begins register… Repairs typically run $300-$1,500. Severity: medium.

What is the 2008-2015 Cadillac CTS HID Headlamp Ballast Corrodes from Water Intrusion and the Light Goes Out?

CTS models fitted with high-intensity discharge headlamps use a separate ballast/igniter module mounted low in the headlamp housing. The housing takes on water - through a failed seal, a cracked lens or a missing bulb cap - and the water pools directly on the ballast, corroding i… Repairs typically run $200-$900. Severity: medium.