LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Buick >> 2001 >> LeSabre Custom, 4T65E/MN3 >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Body Control Modules >> Diagnostic Trouble Code Definitions
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Trouble Code Definitions

DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTC Description Perform Test
B0012 Instrument Panel Module Deployment Loop (Stage 2) Resistance Low (1)
B0013 Instrument Panel Module (Stage 2) High Is Less Than 2.4 Volts/Instrument Panel Module Deployment Loop (Stage 2) Resistance Open (1)
B0014 Instrument Panel Module (Stage 2) High &/Or Low Short To Ground Or Voltage/Instrument Panel Module (Stage 2) Less Than 2.4 Volts & Instrument Panel Module (Stage 2) Deployment Loop Resistance Low (1)
B0016 Right Front/Passenger Frontal Deployment Loop (Single Stage Or Stage 1) Resistance Low (1)
B0017 Right Front/Passenger Frontal Deployment Loop (Single Stage Or Stage 1) Open (1)
B0018 Right Front Passenger Frontal Deployment Loop (Single Stage Or Stage 1) Short To Ground/Voltage Out Of Range (1)
B0022 Left Front/Driver Frontal Deployment Loop (Single Stage Or Stage 1) Resistance Low (1)
B0024 Left Front/Driver Frontal Deployment Loop (Single Stage Or Stage 1) Short To Ground/Voltage Out Of Range (1)
B0026 Left Front/Driver Frontal Deployment Loop (Single Stage Or Stage 1) Open (1)
B0028 Right Front/Passenger Side Deployment Loop Resistance Low (1)
B0029 Right Front/Passenger Side Deployment Loop Open (1)
B0030 Right Front/Passenger Side Deployment Loop Short To Ground/Voltage Out Of Range (1)
B0040 Left Front/Driver Side Deployment Loop Resistance Low (1)
B0041 Left Front/Driver Side Deployment Loop Open (1)
B0042 Steering Wheel Module (Stage 2) Deployment Loop Resistance Low (1)
B0043 Steering Wheel Module (Stage 2) High &/Or Low Circuits Short To Ground/Voltage (1)
B0044 Steering Wheel Module (Stage 2) High Low Volts/Deployment Loop Resistance High (1)
B0045 Left Front Side Deploy Loop Short To Ground/Voltage Out Of Range (1)
B0051 Deployment Commanded (1)
B0053 Deployment Commanded With Loop Malfunctions Present (1)
B0077 Left Front/Driver SIS Malfunction (1)
B0078 Right Front/Passenger SIS Malfunction (1)
B0079 Incorrect Left Front/Driver SIS Installed (1)
B0080 Discard Left Front/Driver SIS (1)
B0081 Incorrect Right Front/Passenger SIS Installed (1)
B0082 Discard Right Front/Passenger SIS (1)
B0100 Valid ID Message Not Received (1)
B0101 Sensing & Diagnostic Module Received Not OK Message (1)
B0102 ID Message Does Not Match ID Stored In Sensing & Diagnostic Module Memory (1)
B0126 Right Panel Discharge Sensor Fault (2)
B0131 Right Heater Discharge Sensor Fault (2)
B0159 Outside Air Temperature Sensor Circuit Range/Performance (2)
B0164 Passenger's Compartment Temperature Sensor No. 1 (Single Sensor Or Left) Circuit Range/Performance (2)
B0174 Output Air Temperature Sensor No. 1 (Upper, Single Or LH) Circuit Range/Performance (2)
B0179 Output Air Temperature Sensor No. 2 (Lower, Single Or LH) Circuit Range/Performance (2)
B0184 Or B0189 Solar Load Sensor Circuit (2)
B0233 Air Mix Door Circuit Range (2)
B0234 Air Mix Door No. 1 Range Error (2)
B0237 Air Mix Door No. 1 Inoperative (2)
B0238 Mode Door Circuit Range (2)
B0249 Heater/Defrost/AC Door Range Error (2)
B0252 Heater/Defrost/AC Door Inoperative (2)
B0268 Air Inlet Door Circuit Range (2)
B0269 Air Inlet Door Range Error (2)
B0272 Air Inlet Door Inoperative (2)
B0279 Air Mix Door No. 2 Range Error (2)
B0282 Air Mix Door No. 2 Inoperative (2)
B1000 ECU Malfunction DTC B1000 
B1001 Option Configuration Error DTC B1001 
B1004 Keep Alive Memory DTC B1004 
B1007 EEPROM Write Error DTC B1007 
B1009 EEPROM Checksum Error DTC B1009 
B1010 Calibration ROM Checksum Error DTC B1010 
B1327 Device Power Circuit Low (4)
B1390 Device Voltage Reference Input Circuit Malfunction DTC B1390 
B1422 Device Power Moding Malfunction DTC B1422 
B1513 Charging System Volts Low (4)
B1514 Charging System Volts High (4)
B1536 Engine Coolant Overtemperature - A/C Disabled (2)
B1562-B1577 Mirror Switch Closed (5)
B1582-B1623 Mirror Position Sensor Signal Low/High (5)
B1735-B1820; B1830-B1845 Seat Switch Shorted (6)
B1780 VIN Message Does Not Match/Not Received (7)
B1825, B1850, B1860, B2355, B2365, B2375 Seat Position Sensor Out Of Range (6)
B1826, B1851, B1861, B2356, B2366, B2376 Seat Position Sensor Voltage In Wrong Direction (6)
B2462 Vehicle Interface Unit Does Not Detect Global Positioning Sensor Signal (8)
B2476 Keypad Reference Voltage To Vehicle Interface Unit Less Than 2.8 Volts Or More Than 3.2 Volts (8)
B2556 Interior Lamp Rheostat Circuit Range (9)
B2627 Passenger's Compartment Dimming No. 2 Circuit Low (9)
B2628 Passenger's Compartment Dimming No. 2 Circuit High (9)
B2641 Delayed Exterior Lighting Control Circuit Range (9)
B2642 Delayed Exterior Lighting Control Circuit Low (9)
B2643 Delayed Exterior Lighting Control Circuit High (9)
B2646 Ambient Light Sensor Circuit Range (9)
B2647 Ambient Light Sensor Circuit Low (9)
B2648 Ambient Light Sensor Circuit High (9)
B2657 Ignition Halo Lamp Output Circuit Malfunction (9)
B2721 Invalid Coded Key Present (10)
B2723 Unreadable Key Data (10)
B2734 Coded Key Controller Memory Failure (10)
B2735 Key Decoder In Assembly Learn Mode (10)
B2757 Driver's Memory Circuit Shorted (6)
B2762 Driver's Memory Circuit Shorted (6)
B2767 Driver's Memory Circuit Shorted (6)
B2772 Driver's Memory Circuit Shorted (6)
B2805 Temperature Switches Stuck (2)
B2810 Steering Wheel Radio Switch Stuck (7)
B2818 Tire Inflation Monitor (11)
B2823 Trip Odometer Reset Switch Circuit Low (Base Instrument Panel Cluster Only) (3)
B2828 Driver Information Center Fuel Switch Circuit Low (Uplevel Instrument Panel Cluster Only) (3)
B2833 Driver Information Center Gauge Switch Circuit Low (Uplevel Instrument Panel Cluster Only) (3)
B2838 Driver Information Center Reset Switch Circuit Low (Uplevel Instrument Panel Cluster Only) (3)
B2843 Driver Information Center English/Metric Switch Circuit Low (3)
B2848 Driver Information Center Trip/Season Switch Circuit Low (Uplevel Instrument Panel Cluster Only) (3)
B2947 Antenna Power Short To Ground (10)
B2948 Antenna Power Short To Battery Voltage (10)
B2955 Key Code Input Short To Battery Voltage (10)
B2960 Invalid Coded Key Present (10)
B3031 Key Decoder Device In Assembly Learn Mode (10)
B3055 Key Not Present (10)
B3109 Transmitter Voltage Signal Low (10)
B3142-B3157 Passenger Door Lock Switch Or Driver's Door Switch Assembly Shorted (12)
B3172-B3282 Window Switch Malfunction (13)
B3377-B3472 Driver's Door Switch Assembly Window Switch Malfunction (13)
B3527 Window Lock-Out Switch Shorted (13)
B3564 Driver Information Center Mode Switch Signal Circuit Low (3)
B3569 Driver Information Center Select Menu Switch Signal Low (3)
B3793 Seat Motor Circuit Excessive Current (6)
CXXXX Electronic Brake Control Module (11)
C0625 Level Control Suspension Sensor Malfunction (14)
C0628 Level Control Position Sensor Circuit High (14)
C0660 Level Control Exhaust Circuit Malfunction (14)
C0663 Level Control Exhaust Circuit High (14)
C0697 Level Control Accessory Inflator Switch Malfunction (14)
C1245 Tire Pressure Monitor Reset (11)
PXXXX Powertrain Control Module Fault (15)
P0218 Transaxle Fluid Overtemperature (16)
P0462 Fuel Level Sender Circuit - Low Voltage (3)
P0463 Fuel Level Sender Circuit - High Voltage (3)
P0502 Vehicle Speed Sensor Circuit Low (16)
P0503 Vehicle Speed Sensor Circuit Performance (16)
P0522 Engine Oil Pressure Sender Circuit - Low Voltage (3)
P0523 Engine Oil Pressure Sender Circuit - High Voltage (3)
P0530 A/C Pressure Signal (2)
P0711 Transmission Fluid Temperature Sensor Circuit Performance (16)
P0712 Transmission Fluid Temperature Sensor Circuit Low Input (16)
P0713 Transmission Fluid Temperature Sensor Circuit High Input (16)
P0716 Input Shaft Speed Circuit Performance (16)
P0717 Input Shaft Speed Circuit No Signal (16)
P0719 Torque Converter Clutch Brake Switch Circuit Low Input (16)
P0724 Torque Converter Clutch Brake Switch Circuit High Input (16)
P0730 Incorrect Gear Ratio (16)
P0741 Torque Converter Clutch System Stuck Off (16)
P0742 Torque Converter Clutch System Stuck On (16)
P0748 Pressure Control Solenoid Electrical Problem (16)
P0751 1-2 Shift Solenoid Performance (16)
P0752 1-2 Shift Solenoid Performance (16)
P0753 1-2 Shift Solenoid Electrical Problem (16)
P0756 2-3 Shift Solenoid Performance (16)
P0757 2-3 Shift Solenoid Performance (16)
P0758 2-3 Shift Solenoid Electrical Problem (16)
P1554 Cruise Control Feedback Circuit (17)
P1585 Cruise Control Inhibit Output Circuit (17)
P1626 Theft Deterrent Fuel Enable Signal Lost (10)
P1630 Theft Deterrent Learn Mode (10)
P1631 Theft Deterrent Start Enable Signal Incorrect (10)
P1644 Delivered Torque Signal Voltage Invalid (11)
P1689 Delivered Torque Signal Voltage Invalid (11)
P1810 Transmission Fluid Pressure Manual Valve Invalid Switch Combination (16)
P1811 Shift Counter Value High (16)
P1814 Torque Converter Clutch Slippage (16)
P1819 Internal Mode Switch Signal Invalid (16)
P1820 Internal Mode Switch Signal "A" Always Low (16)
P1822 Internal Mode Switch Signal "B" Always High (16)
P1823 Internal Mode Switch Signal "P" Always Low (16)
P1825 Invalid Transmission Range (16)
P1826 Internal Mode Switch Signal "C" Always High (16)
P1860 Voltage Outside Calibration Limits (16)
P1887 Torque Converter Clutch Release Pressure Switch Open (16)
U1000 & U1255 Class 2 Communication Malfunction DTC U1000 & U1255 
U1001-U1254 Loss Of Communications With XXX DTC U1001-U1254 
U1161 Loss Of Passenger Door Module Serial Data DTC U1161 
U1162 Loss Of Left Rear Door Module Serial Data DTC U1162 
U1163 Loss Of Right Rear Door Module Serial Data DTC U1163 
U1170 Loss Of Driver Door Switch Assembly Serial Data DTC U1170 
U1300 Class 2 Data Link Low DTC U1300 
U1301 Class 2 Data Link High DTC U1301 
U1305 Class 2 Data Link Low Or High DTC U1305 
(1) For information on air bag DIAGNOSIS & TESTING or DISPOSAL PROCEDURES, see lemon-25(R) AIR BAG SERVICE & REPAIR MANUAL, DOMESTIC & IMPORTED MODELS.
(2) Perform appropriate diagnostic procedure. See appropriate MANUAL or AUTOMATIC A/C-HEATER SYSTEMS article in AIR CONDITIONING & HEATING.
(3) Perform appropriate diagnostic procedure. See appropriate ANALOG INSTRUMENT PANELS article.
(4) Perform appropriate diagnostic procedure. See appropriate GENERATOR & REGULATORS article in STARTING & CHARGING SYSTEMS.
(5) Perform appropriate diagnostic procedure. See POWER MIRRORS - BONNEVILLE & LESABRE article.
(6) Perform appropriate diagnostic procedure. See appropriate POWER SEATS article.
(7) Repair radio concern.
(8) Repair cellular phone concern.
(9) Perform appropriate diagnostic procedure. See AUTOMATIC TWILIGHT SENTINEL - BONNEVILLE & LESABRE article.
(10) Perform appropriate diagnostic procedure. See appropriate ANTI-THEFT SYSTEMS article.
(11) Perform appropriate diagnostic procedure. See ANTI-LOCK/TCS - BOSCH 5.3 - C, G, H & K BODIES article in BRAKES.
(12) Perform appropriate diagnostic procedure. See POWER DOOR LOCKS & TRUNK RELEASE - BONNEVILLE & LESABRE article.
(13) Perform appropriate diagnostic procedure. See POWER WINDOWS - BONNEVILLE & LESABRE article.
(14) Perform appropriate diagnostic procedure. See appropriate ELECTRONIC - LEVEL CONTROL - "G" & "H" BODIES article in SUSPENSION.
(15) For DTC descriptions and testing procedures not listed in this table, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
(16) Perform appropriate diagnostic procedure. See appropriate DIAGNOSIS article in AUTOMATIC TRANSMISSIONS.
(17) Perform appropriate diagnostic procedure. See CRUISE CONTROL SYSTEMS - BONNEVILLE & LESABRE article.
scientia non olet · About LEMON Manuals