Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2009TAHOE BASE, 4.8 CREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 269 (HVAC SYSTEM - AUTOMATIC)DIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC CODE INDEX
2009 Chevrolet Tahoe Base, 4.8 C
Diagnostic Code Index
2009 Chevrolet Tahoe Base, 4.8 CSECTION Diagnostic Code Index
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2010 GMC Yukon XL, 2010 GMC Yukon, 2010 Chevrolet Tahoe, 2010 Chevrolet Suburban, and 2010 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC B0158, B0163, B0168, B0173, B0178, B0509, B0514, B3578, or B3583 | B0158 02: Outside Air Temperature Sensor Circuit Short to Ground B0158 05: Outside Air Temperature Sensor Circuit Short to Battery or Open B0163 02: Passenger Compartment Temp Sensor 1 Circuit Short to Ground B0163 05: Passenger Compartment Temp Sensor 1 Circuit Short to Battery or Open B0168 02: Passenger Compartment Temp Sensor 2 Circuit Short to Ground B0168 05: Passenger Compartment Temp Sensor 2 Circuit Short to Battery or Open B0173 02: Output Air Temperature Sensor 1 Circuit Short to Ground B0173 05: Output Air Temperature Sensor 1 Circuit Short to Battery or Open B0178 02: Output Air Temperature Sensor 2 Circuit Short to Ground B0178 05: Output Air Temperature Sensor 2 Circuit Short to Battery or Open B0509 02: Output Air Temperature Sensor 3 Circuit Short to Ground B0509 05: Output Air Temperature Sensor 3 Circuit Short to Battery or Open B0514 02: Output Air Temperature Sensor 4 Circuit Short to Ground B0514 05: Output Air Temperature Sensor 4 Circuit Short to Battery or Open B3578 02: Output Air Temperature Sensor 6 Circuit Short to Ground B3578 05: Output Air Temperature Sensor 6 Circuit Short to Battery or Open B3583 02: Output Air Temperature Sensor 7 Circuit Short to Ground B3583 05: Output Air Temperature Sensor 7 Circuit Short to Battery or Open |
| DTC B0183 or B0188 | B0183 02: Solar Load Sensor 1 Circuit Short to Ground B0183 05: Solar Load Sensor 1 Circuit Short to Battery or Open B0188 02: Solar Load Sensor 2 Circuit Short to Ground B0188 05: Solar Load Sensor 2 Circuit Short to Battery or Open |
| DTC B0228, B0413, B0423, B0433, B3779, or B3782 | Recirculation Position Circuit/Temperature Control Feedback |
| DTC B1023 | B1023 05: Integral Switch Performance Short to Ground B1023 06: Integral Switch Performance Short to Battery or Open B1023 61: Integral Switch Performance Signal Invalid |
| DTC B3844 | B3844: Heater Core Pump Circuit |
| DTC B3933 | B3933 02: Evaporator Air Temperature Sensor Short to Ground B3933 05: Evaporator Air Temperature Sensor Short to Battery or Open |
| DTC P0532 or P0533 | P0532: Air Conditioning A/C Refrigerant Pressure Sensor Circuit Low Voltage P0533: Air Conditioning A/C Refrigerant Pressure Sensor Circuit High Voltage |
| DTC P0645 | P0645: A/C Clutch Relay Control Circuit |
| DTC P2518 | P2518 11: A/C Refrigerant Low Side Fluid Pressure Sensor Circuit Above Maximum Threshold P2518 12: A/C Refrigerant Low Side Fluid Pressure Sensor Circuit Below Minimum Threshold |
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.