B0263 on 2013-2019 Cadillac XTS — Air Flow Control 6 Circuit
1 vehicles · 1 makes · $120-$450 repair
Most Reported On
B0263 is an OBD-II diagnostic trouble code meaning “Air Flow Control 6 Circuit.” General Motors body code. "Air Flow Control 6" is the formal GM/SAE name; in practice on most applications it is the HVAC mode (air direction) door actuator, and it is common on 2003-2011 full-size trucks and SUVs (Silverado, Sierra, Suburban, Tahoe, Avalanche, TrailBlazer, Envoy). Each air door actuator is a stepper motor with an internal potentiometer that reports shaft position back to the HVAC control module; the code sets when the actual reported position does not match the commanded position, or the actuator fails its calibration sweep. The usual symptom is air coming out of the wrong vents - most often stuck on defrost regardless of the setting. It does not affect how the engine runs and will not turn on the check engine light. Which physical door "6" refers to varies by application, so confirm against the service information for the specific year and model. This code is most commonly reported on 2013-2019 Cadillac XTS, with repair costs ranging from $120 to $450.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
This is a body code. A basic engine-code reader will not show it — you need a scanner that reads body modules. These read B0263.
One caveat that applies to every scanner: only powertrain codes are standardised across manufacturers. Body, chassis and network coverage is "enhanced" diagnostics, and how deep it goes varies by make and model year — check your specific vehicle against the tool's coverage list before buying.
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level tablet with all-system coverage and bi-directional control, so you can command a module rather than only read it.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
What you can do yourself, and what needs a shop
Reading the code, clearing it, and watching whether it returns is a driveway job with the right scanner. These steps are not:
- Module programming or software updates — needs the manufacturer software or a J2534 pass-through with a paid subscription.
- Replacing a control module — most are VIN-programmed and immobilizer-registered, so a new one does nothing until it is coded to your car.
- Airbag/SRS component work — a stored fault can deploy a live device.
If the vehicle is still under warranty, check for an open recall or technical service bulletin before buying anything — the repair may already be covered.
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FAQ
What does B0263 mean?
B0263 stands for "Air Flow Control 6 Circuit." General Motors body code. "Air Flow Control 6" is the formal GM/SAE name; in practice on most applications it is the HVAC mode (air direction) door actuator, and it is common on 2003-2011 full-size trucks and SUVs (Silverado, Sierra, Suburban, Tahoe, Avalanche, TrailBlazer, Envoy). Each air door actuator is a stepper motor with an internal potentiometer that reports shaft position back to the HVAC control module; the code sets when the actual reported position does not match the commanded position, or the actuator fails its calibration sweep. The usual symptom is air coming out of the wrong vents - most often stuck on defrost regardless of the setting. It does not affect how the engine runs and will not turn on the check engine light. Which physical door "6" refers to varies by application, so confirm against the service information for the specific year and model.
What are the most common causes of B0263?
The most common causes of B0263 are: Failed HVAC door actuator (stripped internal gears or failed potentiometer), Binding or broken air door inside the HVAC case, Failed recalibration after a battery disconnect or replacement, Open, shorted, or chafed wiring in the actuator circuit, Corroded or loose actuator connector, Faulty HVAC control module (less common). The specific cause varies by vehicle.
How much does it cost to fix B0263?
Repair costs for B0263 range from $120 to $450, depending on the vehicle and root cause.
Which vehicles are affected by B0263?
Au7o has documented B0263 across 1 vehicle models from 1 manufacturers: Cadillac.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.