Cadillac XT6 Fault Codes
You can find common Cadillac XT6 fault codes on this page that when clicked take you to a detailed description.
You can also type in the fault code you are getting below to find a more detailed description.
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Cadillac XT6 Recall Notices
Common Cadillac XT6 Codes
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Cadillac XT6 Recalls
When a car manufacturer detects a problem with a model they put out a recall notice and more often than not offer to fix the problem free of charge.
You can check to see if your Cadillac XT6 has any recall notices on our sister site AutoRecalls.co, sorted by model year.
View Cadillac XT6 Recalls »
Common XT6 Fault Codes
These are the most common XT6 fault codes that people are searching for.
4/10
P0128
Coolant Thermostat (Coolant Temp Below Thermostat Regulating Temperature)
Learn More Fixes P1626
Theft Deterrent Fuel Enable Signal Not Received/ B+ Supply To VCRM A/C Circuit Malfunction
Learn More P1631
Theft Deterrent Start Enable Signal Not Correct/ Main Relay Malfunction (Power Hold)
Learn More
8/10
P0106
Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem
Learn More Fixes
4/10
P0449
Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction
Learn More Fixes
- Manufacturer: Cadillac
About the XT6
The XT6 entered the market as the largest crossover offering in the Cadillac lineup in 2019. This can be seen by its name ‘XT’ standing for Crossover Touring, while the ‘6’ indicates that it sits above both the XT4 and XT5.
Since its release, there has been only a single generation to hit the markets. These include North America, China, Russia, and Japan.
The XT6 goes up against a number of notable luxury crossover models. Some of its main competitors include the Genesis GV80, Porsche Cayenne, BMW X5, and Volvo XC90.
The model has faced a number of misfire issues, causing a technical service bulletin (TSB) to be released addressing the issue.
This is typically shown by fault code P0300, which indicates that multiple random misfires have occurred. It has been noted by owners that this commonly happens during a cold start.
According to the TSB, this can be caused by cylinder block porosity, which will require a technician to diagnose. Unfortunately, this may require the entire engine to be replaced.
Another common issue for the model is P0621, which is logged when the generator lamp L control circuit is malfunctioning.
The potential causes of this issue can be fairly extensive. However, a failing alternator or battery are some of the most commonly reported by owners.
Fault code P0455 is another problem that owners have reported fairly commonly. This code indicates that there is a leak from the evaporative emissions control (EVAP) system. Unlike the other two codes, this is a fairly mild problem in terms of seriousness.
In most cases, this code is caused simply by a loose gas cap. It is also possible that the gas cap is defective and needs replacing.
