Cadillac CT6 Mass Air Flow Sensor Guide (2016-2020)
Understand the signs of a failing Mass Air Flow sensor in your 2016-2020 Cadillac CT6 and how to choose the right replacement.
- Symptoms of a bad MAF sensor include a Check Engine Light (P0101), rough idle, poor acceleration, and bad gas mileage.
- Before replacing, try cleaning the sensor with dedicated MAF sensor cleaner; this often solves the problem.
- Replacement is extremely easy (1/5 difficulty) and can be done in minutes with a Torx driver, making it a great DIY task.
- Check for corrosion on the electrical connector, as a known TSB (24-NA-158) points to water intrusion as a potential issue.
Is Your CT6 Showing These Symptoms?
A dirty or failing Mass Air Flow (MAF) sensor can cause noticeable problems in your Cadillac CT6. Because the sensor provides vital data for the engine's fuel mixture, a bad signal can make the car run poorly. Many owners first notice a problem when the Check Engine Light comes on, but other symptoms often appear first.
Common Signs of MAF Sensor Failure:
- Check Engine Light: This is the most common indicator. A scanner will typically show codes like P0101, P0102, or P0174. 🎬 Watch: Understanding P0101 causes, symptoms, and fixes
- Rough Idle: The engine may shake, sputter, or sound uneven when the car is stopped.
- Poor Fuel Economy: If the sensor is faulty, the engine's computer may inject too much fuel, causing you to fill up more often.
- Hesitation or Jerking: When you accelerate, the car might feel sluggish, hesitate, or jerk because the engine isn't getting the right fuel mixture for the amount of air it's receiving.
- Black Exhaust Smoke: Black smoke from the tailpipe indicates the engine is running "rich," with too much fuel and not enough air, a classic symptom of a bad MAF reading.
Pro Tip: Try Cleaning It First
Before you buy a new sensor, it's often worth trying to clean the existing one. Contaminants like dust, oil, or debris can build up on the sensor's delicate wires and cause incorrect readings. Purchase a dedicated MAF sensor cleaner spray from any auto parts store. The process is simple: remove the sensor, spray the cleaner on the wires and sensor elements without touching them, let it dry completely for at least 30 minutes, and reinstall it. This simple step can sometimes restore function and save you the cost of a new part.
🎬 See this in-depth guide on how to clean your sensorChoosing a New Aftermarket MAF Sensor
If cleaning doesn't solve the issue, a replacement is necessary. For the 2016-2020 Cadillac CT6, you have several good options that don't require paying dealership prices for an OEM part.
Brand Quality Tiers
- OEM-Level Quality (ACDelco, Delphi, Hitachi, NGK): ACDelco is GM's own parts brand, offering a direct replacement. Delphi and Hitachi are often the original equipment manufacturers for GM and other carmakers, meaning their aftermarket part can be identical to the factory one. NGK (sometimes branded as NTK for sensors) is another top-tier supplier known for excellent quality. Choosing one of these brands is the safest bet for fit, function, and longevity.
- Trusted Aftermarket (Standard Ignition, Walker Products, Beck Arnley): These are well-established brands in the aftermarket world. They produce reliable parts that meet or exceed OEM specifications and offer a good balance of quality and price. Beck Arnley specializes in sourcing parts that match the original equipment, making them a strong choice.
- Value-Oriented (Cardone, DriveWire, Motorad): These brands provide a more budget-friendly option. Cardone offers both new and remanufactured parts and has a solid reputation. While they can be a good value, quality can sometimes be less consistent than the premium brands.
Known Issue: Water Intrusion (TSB 24-NA-158)
General Motors issued a Technical Service Bulletin (TSB) for a condition where water can enter the MAF sensor's electrical connector. This can cause a Check Engine Light with code P0102. The official fix involves replacing both the MAF sensor and the wiring connector pigtail. If you are replacing your sensor, inspect the connector carefully for any signs of corrosion or moisture. If you see any, it is highly recommended to replace the connector as well to prevent the new sensor from failing prematurely.
Cost to Replace a Cadillac CT6 MAF Sensor
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket | $60 - $150 |
| New OEM (GM / ACDelco) | $75 - $165 |
| Shop Labor | $37 - $55 |
| Total Professional Replacement | $200 - $281 |
Costs are estimates and can vary by location and the specific part chosen. The repair is very simple, making DIY replacement a great way to save money.
Frequently Asked Questions
Can I replace the CT6 MAF sensor myself?
Yes, this is a very easy DIY job. The sensor is located on the main air intake tube and is held in place by two screws (usually a Torx T15 or T20) and a single electrical connector. The entire job can be done in under 15 minutes with basic tools, making it one of the easiest sensors to replace on your vehicle.
🎬 Watch: A quick walkthrough on how to replace the sensorDoes my CT6 have more than one MAF sensor?
No, the Cadillac CT6 models (2.0L, 3.6L, 3.0L Twin-Turbo) use a single Mass Air Flow sensor. It is located in the air intake duct between the air filter box and the engine throttle body.
Are there any recalls for the CT6 MAF sensor?
No, as of late 2024, there are no active NHTSA recalls for the Mass Air Flow sensor on the 2016-2020 Cadillac CT6. However, there is a Technical Service Bulletin (TSB 24-NA-158) related to water getting into the sensor's connector.
What is the most common mistake when ordering this part?
While many GM vehicles use similar MAF sensors, part numbers can vary by engine and year. The 2.0L, 3.6L, and 3.0L engines may use different sensors. Always verify the part number or use a fitment tool to ensure you are buying the correct sensor for your specific CT6 engine. Common OEM part numbers include 23262343 and 15865791.
Helpful Videos
Technical Specifications
OEM Part Numbers: 23262343 23262344 15865791 55505735
Typically a 5-pin sensor element mounted in the air intake duct. Different part numbers may apply to the 2.0L, 3.6L, and 3.0L engines.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Cadillac CT6:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your CT6 Showing These Symptoms?
- Common Signs of MAF Sensor Failure:
- Pro Tip: Try Cleaning It First
- Choosing a New Aftermarket MAF Sensor
- Brand Quality Tiers
- Known Issue: Water Intrusion (TSB 24-NA-158)
- Cost to Replace a Cadillac CT6 MAF Sensor
- Frequently Asked Questions
- 🎟️ Get 5% Off