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Diagnostic Trouble Code Definitions

DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTC Description Perform Test
B0532 Fuel Sensor Short To Ground (1)
B0533 Fuel Sensor Open/Short To Voltage (1)
B0846 Memory Seat Module Voltage Malfunction (2)
B0856 Battery Positive Supply Out Of Range (2)
B1000 Control Module Detects Internal Fault DTC B1000 
B1007 Control Module EEPROM Write Error DTC B1007 
B1009 Control Module Checksum Error DTC B1009 
B1115 Instrument Panel Module Deployment Loop High Resistance (3)
B1116 Instrument Panel Module Deployment Loop Low Resistance (3)
B1117 Instrument Panel Module Deployment Loop Circuit Failure (3)
B1121 Steering Wheel Module Deployment Loop High Resistance (3)
B1122 Steering Wheel Module Deployment Loop Low Resistance (3)
B1124 Steering Wheel Module Deployment Loop Circuit Failure (3)
B1125 Steering Wheel Module Deployment Loop Malfunction (3)
B1126 Steering Wheel Module Deployment Loop Resistance Failure (3)
B1135 Front End Discriminating Sensor Circuit Short To Ground (3)
B1136 Front End Discriminating Sensor Circuit Short To Voltage (3)
B1151 Frontal Air Bag Deployment Circuit Malfunction (3)
B1152 EEPROM Data Full (3)
B1153 Deployment Circuit Malfunction (3)
B1155 Sensing & Diagnostic Module Receives Wrong Message From Instrument Panel Cluster (3)
B1159 Sensing & Diagnostic Module Does Not Receive Partial Message From Body Control Module (3)
B1160 Sensing & Diagnostic Module Does Not Receive Partial Message From Instrument Panel Cluster (3)
B1163 Sensing & Diagnostic Module Receives Wrong Response From Instrument Panel Cluster (3)
B1171 Sensing & Diagnostic Module Internal Malfunction (3)
B1245 Radio Detects Loss Of Entertainment & Comfort Communications (4)
B1271 VIN Information Mismatch (4)
B1310 Outside Temperature Sensor Open Circuit (5)
B1311 Outside Temperature Sensor Short Circuit (5)
B1312 A/C High Side Temperature Sensor Open Circuit (5)
B1313 A/C High Side Temperature Sensor Short Circuit (5)
B1314 Evaporator Inlet Temperature Sensor Open Circuit (5)
B1315 Evaporator Inlet Temperature Sensor Short Circuit (5)
B1316 In-Car Temperature Sensor Open Circuit (5)
B1317 In-Car Temperature Sensor Short Circuit (5)
B1318 Sun Load Sensor Open Circuit (5)
B1319 Sun Load Sensor Short Circuit (5)
B1327 System Voltage Low (6)
B1340 Air Mix Door #1 Movement Failure (5)
B1341 Air Mix Door #2 Movement Failure (5)
B1347 Very Low A/C Refrigerant Warning (5)
B1348 Very Low A/C Refrigerant Pressure Condition (5)
B1350 High Engine Coolant Temperature (5)
B1552 Loss Of Keep Alive Memory DTC B1552 
B1556 Instrument Panel Cluster EEPROM Odometer Error DTC B1556 
B1557 Instrument Panel Cluster EEPROM Calibration Error (1)
B1558 Instrument Panel Cluster EEPROM Checksum Error DTC B1558 
B1656 Instrument Panel Cluster EEPROM Write Error DTC B1656 
B1658 Body Control Module Checksum Error DTC B1658 
B1760 Radio Detects Loss Of Entertainment & Comfort Communications (4)
B1780 VIN Information Mismatch (4)
B1910 Generator "L" Terminal Open Circuit (6)
B1911 Generator "L" Terminal Malfunction (6)
B1970 Exterior Light Power Fault (8)
B1971 Inadvertent Power Fault (8)
B1972 Body Control Module B+ Voltage Short To Ground DTC B1972 
B1973 Body Control Module B+ Voltage Short To Voltage DTC B1973 
B1981 Battery Voltage Too Low (6)
B1982 Device Power 1 Circuit High (6)
B1983 Device Power 1 Circuit Low (6)
B2101-B2108 Power Seat Control Switch Circuit Short (2)
B2109-B2112 Lumbar Switch Circuit Short (2)
B2115-B2120 Seat Position Sensor Voltage Out Of Range (2)
B2130-B2133 Memory Recall Switch Circuit Failure (2)
B2140-B2143 Power Mirror Reached Limit Of Travel (7)
B2144, B2146, B2148 Or B2150 Outside Rearview Mirrors Position Sensor Input Voltage Low (7)
B1245, B2147, B2149 Or B2151 Outside Rearview Mirrors Position Sensor Input Voltage High (7)
B2419 Twilight Photo Cell Circuit Malfunction (8)
B2462 Vehicle Interface Unit Does Not Detect GPS Signal (9)
B2470 Daytime Running Lights Fault (8)
B2471 Interior Lights Fault (8)
B2472 Low Beam Fault (8)
B2473 High Beam Fault (8)
B2476 Parking Lights Fault (8)
B2477 Reverse Light Relay Short To Ground (8)
B2478 Reverse Light Relay Short To Voltage (8)
B2502 Park Relay Short To Ground (10)
B2503 Park Relay Short To Voltage (10)
B2510 Heating Ventilation Air Conditioning Switch Stuck (5)
B2511 Steering Wheel Control Convenience Key Stuck (11)
B2515 Steering Wheel Controls Illegal Resistance Value (11)
B2550 Storage Mode Entered DTC B2550 
B2710 Pass-Key II(R) Open/Short Pellet (12)
B2711 Pass-Key II(R) Open/Short Pellet After Good Key (12)
B2719 Content Theft Deterrent Trunk Tamper Switch Fault (12)
B2750 Instrument Panel Cluster & Powertrain Control Module Communication Failure (12)
B2780 Current Key Pellet Resistance Mismatch (12)
B2781 Current Key Pellet Resistance Malfunction (12)
B2782 Pass-Key II(R) Pellet Resistance Not Programmed (12)
B2783 Keycode/Password Invalid In Memory (12)
B3109 Remote Transmitter Low Battery Detection (13)
C0550 Control Module Malfunction (14)
C0563 Calibration ROM Checksum Error (14)
C0577, C0578, C0579, C0582, C0583, C0584, C0587, C0588, C0589, C0592, C0593 or C0594 Solenoid Circuit (14)
C0615, C0620, C0625 Or C0630 Position Sensor Circuit (14)
C0635, C0638, C0640, C0643, C1252 Or C1253 Normal Force Circuit Malfunction (14)
C0657 Level Control Circuit Low (14)
C0658 Level Control Circuit High (14)
C0662 Level Control Exhaust Valve Circuit Low (14)
C0663 Level Control Exhaust Valve Circuit High (14)
C0665 Chassis Pitch Signal Circuit (14)
C0690, C0694 Or C0693 Damper Control Relay Circuit (14)
C0695 Position Sensor Overcurrent (14)
C0710 Steering Position Signal Malfunction (14)
C0896 Device Voltage Range/Performance (14)
C1211 Anti-Lock Brake System Indicator Circuit Malfunction (15)
C1214 Solenoid Valve Relay Or Coil Circuit Open (15)
C1217 Pump Motor Relay Contact Circuit Open (15)
C1221-C1235 Wheel Speed Sensor (15)
C1236 System Voltage Low (15)
C1237 System Voltage High (15)
C1238 Brake Thermal Model Limit Exceeded (15)
C1241 Variable Effort Steering Circuit Malfunction (16)
C1242 Or C1243 Pump Motor Ground Circuit Open (15)
C1255 Or C1256 Electronic Brake Control Module Internal Malfunction (15)
C1261-C127 Solenoid Malfunction (15)
C1276, P1644 Or P1689 Delivered Torque Signal Circuit Malfunction (15)
C1277 Or P1571 Requested Torque Signal Circuit Malfunction (15)
C1278 Traction Control System Temporarily Inhibited By Powertrain Control Module (15)
C1281, C1283 Or C1286 Anti-Lock Brake System Sensors Uncorrelated (15)
C1282 Yaw Rate Sensor Bias Circuit Malfunction (15)
C1284 Or C1285 Lateral Accelerometer Sensor Malfunction (15)
C1287 Or C1288 Steering Sensor Malfunction (15)
C1291 Open Brakelight Switch During Deceleration (15)
C1294 Brakelight Switch Circuit Always Open (15)
C1295 Brakelight Switch Circuit Open (15)
C1297 Powertrain Control Module Indicated Extended Travel Brake Switch Failure (15)
P0218 Transaxle Fluid Over Temperature (17)
P0461 Fuel Level Sensor Malfunction (1)
P0502 Vehicle Speed Sensor Low (17)
P0503 Vehicle Speed Sensor Intermittent (17)
P0574 Powertrain Control Module Detects High Vehicle Speed (18)
P0711 Transmission Fluid Temperature Sensor (17)
P0712 Transmission Fluid Temperature Sensor Circuit Low (17)
P0713 Transmission Fluid Temperature Sensor Circuit High (17)
P0716 Input Speed Shaft Circuit Intermittent (17)
P0717 Input Speed Shaft No Signal Or Low Input (17)
P0719 Torque Converter Clutch Brake Switch Circuit Low Input (17)
P0724 Torque Converter Clutch Brake Switch Circuit High Input (17)
P0731 Incorrect 1st Gear Ratio (17)
P0732 Incorrect 2nd Gear Ratio (17)
P0733 Incorrect 3rd Gear Ratio (17)
P0734 Incorrect 4th Gear Ratio (17)
P0741 Torque Converter Clutch Circuit Stuck Off (17)
P0742 Torque Converter Clutch Circuit Stuck On (17)
P0748 Pressure Control Solenoid Circuit Malfunction (17)
P0751 1-2 Shift Solenoid No 1st Or 4th Gear (17)
P0752 1-2 Shift Solenoid No 2nd Or 3rd Gear (17)
P0756 2-3 Shift Solenoid No 1st Or 2nd Gear (17)
P0757 2-3 Shift Solenoid No 3rd Or 4th Gear (17)
P1189 Engine Oil Pressure Switch Circuit Failure (1)
P1554 Powertrain Control Module Detects Cruise Engaged Signal (18)
P1560 Cruise Control Engaged With Vehicle In Neutral Or Park (18)
P1564 Powertrain Control Module Detects Rapid Acceleration (18)
P1566 Powertrain Control Module Detects High Engine Speed (18)
P1567 Traction Control System Applied Brakes (18)
P1570 Traction Control Active Cruise Disabled (18)
P1574 Stoplight Switch Circuit (18)
P1585 Cruise Control Inhibit Output Circuit (18)
P1617 Engine Oil Level Switch Circuit Failure (1)
P1811 Maximum Adapt & Long Shift (17)
P1814 Torque Converter Overstressed (17)
P1820 Internal Mode Switch Circuit "A" Low (17)
P1822 Internal Mode Switch Circuit "B" Low (17)
P1823 Internal Mode Switch Circuit "P" Low (17)
P1825 Internal Mode Switch Invalid Range (17)
P1842 1-2 Shift Solenoid Circuit Low Voltage (17)
P1843 1-2 Shift Solenoid Circuit High Voltage (17)
P1845 2-3 Shift Solenoid Circuit Low Voltage (17)
P1847 2-3 Shift Solenoid Circuit High Voltage (17)
P1860 Torque Converter Clutch Pulse Width Monitor Solenoid Circuit Malfunction (17)
P1868 Transmission Fluid Life (17)
PXXX Powertrain Control (19)
U1000 & U1255 Class 2 Communication Malfunction DTC U1000 & U1255 
U1001-U1254 Loss Of XXX Communications DTC U1001-U1254 
U1300 Class 2 Serial Data Circuit Low Voltage DTC U1300 
U1301 Class 2 Serial Data Circuit High Voltage DTC U1301 
U1500 OnStar(R) Serial Data Return Circuit Failure DTC U1500 
(1) See ANALOG INSTRUMENT PANELS - ELDORADO article.
(2) See POWER SEATS - ELDORADO article.
(3) See appropriate AIR BAG RESTRAINT SYSTEMS article.
(4) Repair entertainment system as necessary.
(5) See appropriate AIR CONDITIONING AUTOMATIC article in HEATING & AIR CONDITIONING.
(6) See GENERATORS & REGULATORS - ELDORADO in STARTING & CHARGING SYSTEMS.
(7) See POWER MIRRORS - ELDORADO article.
(8) See HEADLIGHTS - AUTOMATIC TWILIGHT SENTINEL - ELDORADO article.
(9) Repair cellular phone as necessary.
(10) See appropriate SHIFT INTERLOCK SYSTEMS article in AUTOMATIC TRANSMISSIONS.
(11) See STEERING COLUMN SWITCHES - ELDORADO article.
(12) See ANTI-THEFT SYSTEMS - ELDORADO article.
(13) See REMOTE KEYLESS ENTRY SYSTEMS - ELDORADO article.
(14) See appropriate ELECTRONIC - CV ROAD SENSING article in ELECTRONIC SUSPENSION.
(15) See appropriate ANTI-LOCK article in BRAKES.
(16) See appropriate ELECTRONIC article in ELECTRONIC STEERING.
(17) See appropriate ELECTRONIC CONTROLS article in AUTOMATIC TRANSMISSIONS.
(18) See CRUISE CONTROL SYSTEMS - DEVILLE & ELDORADO article
(19) See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.