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 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.
Internal Control Module EEPROM ErrorLearn More
Generator Lamp L Control Circuit MalfunctionLearn More
System Gross Leak Evaporative EmissionLearn More Fixes
Exhaust Camshaft Position Timing - Over-Advanced (Bank 1)Learn More Fixes
Throttle Actuator Control Range/Performance (Bank 1)Learn More
System Too Lean (Bank 1)Learn More Fixes
Catalyst System Efficiency Below Threshold (Bank 1)Learn More Fixes
Intake Camshaft Position Actuator Circuit / Open (Bank 1)Learn More Fixes
System Too Lean (Bank 2)Learn More Fixes
Control Module Communication Bus "A" OffLearn More Fixes
Coolant Thermostat (Coolant Temp Below Thermostat Regulating Temperature)Learn More Fixes
Cylinder 1 Misfire DetectedLearn More Fixes
Camshaft Position Sensor Circuit MalfunctionLearn More Fixes
Pressure Control Solenoid B Performance or Stuck offLearn More Fixes
Transmission Control System MalfunctionLearn More Fixes
Traction Control Input SignalLearn More
Engine Position System Performance - Bank 1Learn More
ECM/PCM Power Relay Sense Circuit HighLearn More
Transmission Fluid Pressure Sensor/Switch E Circuit LowLearn More
A/C Compressor Temperature Sensor MalfunctionLearn More
O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 2)Learn More
Theft Deterrent Fuel Enable Signal Not Received/ B+ Supply To VCRM A/C Circuit MalfunctionLearn More
Throttle Actuator Control System - Idle Position Not LearnedLearn More
Theft Deterrent Start Enable Signal Not Correct/ Main Relay Malfunction (Power Hold)Learn More
Crankshaft Position Camshaft Position Correlation Bank 1 Sensor BLearn More Fixes
Camshaft Position B - Timing Over-Advanced or System Performance (Bank 2)Learn More
Mass or Volume Air Flow Circuit Low Voltage InputLearn More Fixes
Cylinder 6 Misfire DetectedLearn More Fixes
Catalyst System Efficiency Below Threshold (Bank 2)Learn More Fixes
Mass or Volume Air flow Circuit Range/Performance ProblemLearn More Fixes
Control Module Power Circuit Low/High VoltageLearn More
Passenger Door Ajar Circuit FailureLearn More
Evaporative Emission Control System MalfunctionLearn More Fixes
Input/Turbine Speed Sensor Circuit No SignalLearn More
Intake Camshaft Position Timing - Over-Advanced (Bank 2)Learn More Fixes
Evaporative Emission System High Purge FlowLearn More Fixes
SCP (J1850) Invalid or Missing Data for Primary IdLearn More
Lost Communication With Anti-Lock Brake System (ABS) Control ModuleLearn More
SCP (J1850) Invalid or Missing Data for Vehicle ConfigurationLearn More
SCP (J1850) Invalid or Missing Data for Primary IdLearn More
Lost Communication With Body Control ModuleLearn More
Pedal Correlation PDS1 and PDS2Learn More
MAF Sensor Out Of Self Test Range./KOER Not Able To Complete KOER AbortedLearn More
Ignition 1 Switch Circuit 2Learn More
Internal Voltage Regulator MalfunctionLearn More
Data Output Link Circuit FailureLearn More
HO2S Insufficient Switching Bank 2 Sensor 1Learn More
Intake Camshaft Position Timing - Over-Advanced (Bank 1)Learn More Fixes
Intake Camshaft Position Timing - Over-Retarded (Bank 1)Learn More Fixes
Exhaust Camshaft Position Actuator Circuit / Open (Bank 1)Learn More Fixes
Crankshaft Position Camshaft Position Correlation Bank 1 Sensor ALearn More Fixes
Heated Oxygen Sensor (HO2S) Heater Control Circuit Bank 1 Sensor 2Learn More Fixes
Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance ProblemLearn More Fixes
Intake Air Temperature Circuit High InputLearn More Fixes
O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)Learn More Fixes
O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)Learn More Fixes
O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)Learn More Fixes
O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2)Learn More Fixes
O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)Learn More Fixes
O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)Learn More Fixes
System Too Rich (Bank 1)Learn More Fixes
System Too Rich (Bank 2)Learn More Fixes
Random/Multiple Cylinder Misfire DetectedLearn More Fixes
Cylinder 2 Misfire DetectedLearn More Fixes
Cylinder 3 Misfire DetectedLearn More Fixes
Cylinder 4 Misfire DetectedLearn More Fixes
Cylinder 5 Misfire DetectedLearn More Fixes
Knock Sensor 1 Circuit (Bank 2 or Single Sensor)Learn More Fixes
Knock Sensor 2 Circuit Low Input (Bank 2)Learn More Fixes
Crankshaft Position Sensor A Circuit MalfunctionLearn More Fixes
Camshaft Position Sensor Circuit Range/PerformanceLearn More Fixes
Exhaust Gas Recirculation Flow Insufficient DetectedLearn More Fixes
Evaporative Emission Control System Incorrect Purge flowLearn More Fixes
Evaporative Emission Control System Leak DetectedLearn More Fixes
Evaporative Emission Control System Vent Control Circuit MalfunctionLearn More Fixes
Evaporative Emission Control System Vent Valve/Solenoid Circuit MalfunctionLearn 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.