GM Service Manual Online
For 1990-2009 cars only

DTC

Diagnostic Procedure

Module

B0159

DTC B0159 Outside Air Temperature Sensor Circuit Range/Performance

IPM

B0164

DTC B0164 Passenger Compartment Temperature Sensor #1 (Single Sensor or LH) Circuit Range/Performance

IPM

B0174

DTC B0174 Output Air Temperature Sensor #1 (Upper; Single or LH) Circuit Range/Performance

IPM

B0179

DTC B0179 Output Air Temperature Sensor #2 (Lower; Single or LH) Circuit Range/Performance

IPM

B0184

DTC B0184 Solar Load Sensor #1 CKT Range

IPM

B0189

DTC B0189 Solar Load Sensor #2 CKT Range

IPM

B0248

DTC B0248 Mode Door Inoperative Error

IPM

B0249

DTC B0249 Heater/Defrost/AC Door Range Error

IPM

B0268

DTC B0268 A/I Door Inoperative Error

IPM

B0269

DTC B0269 Air Inlet Door Range Error

IPM

B0408

DTC B0408 Temperature Control #1 (Main/Front) Circuit Malfunction

IPM

B0409

DTC B0409 Air Mix Door #1 Range Error

IPM

B0419

DTC B0419 Air Mix Door #2 Range Error

IPM

B0423

DTC B0423 Air Mix Door #2 Inoperative Error

IPM

B0428

DTC B0428 Air Mix Door #3 Inoperative Error

IPM

B0429

DTC B0429 Temperature Control #3 Rear Circuit Range/Performance

IPM

B0510

DTC B0510 RH Panel Discharge Temp Sensor Failure

IPM

B0515

DTC B0515 RH Heater Discharge Temp Sensor Failure

IPM

B0520

DTC B0520 Rear Discharge Temp Sensor Failure

IPM

B1009

DTC B1009 EEPROM Checksum Error

RCC

B2805

DTC B2805 Steering Whl Controls HVAC Sw CKT Malf

DIM

P1531

DTC P1531 A/C Temperature Sensor Circuit Malf

DIM

P1536

DTC P1536 Engine Coolant Overtemperature - Air Conditioning (A/C) Disabled

DIM

P1540

DTC P1540 Air Conditioning (A/C) Refrigerant Overpressure - Air Conditioning (A/C) Disabled

DIM