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Diagnostic Trouble Code Definitions

WARNING: This page is about a different car, the 2002 Pontiac Grand Am and 2002 Oldsmobile Alero. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Intermittent/history communication and/or IGNITION 1 fault DTCs may be caused by incorrect ignition switch operation. See SERVICE INFORMATION  .
DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTC Description Perform Test
B0016 Passenger Front Deployment Loop Resistance Low (1)
B0017 Passenger Front Deployment Loop Open (1)
B0018 Passenger Front Deployment Loop Short To Ground/Voltage Out Of Range (1)
B0022 Driver Front Deployment Loop Resistance Low (1)
B0024 Driver Front Deployment Loop Short To Ground/Voltage Out Of Range (1)
B0026 Driver Front Deployment Loop Open (1)
B0051 Deployment Commanded (1)
B0053 Deployment Commanded With Loop Malfunctions Present (1)
B1000 Body Control Module Malfunction B1000 
B1001 Option Configuration Error B1001 
B1009 EEPROM Check Sum Error B1009 
B1025, B1035, B1045 Or B1055 Radio Speaker Circuit Short To Ground/Voltage B1025-B1055 
B1365 Ignition 0 Voltage Low (2)
B1369 Ignition 0 Fault No Voltage B1369 
B1374 Ignition 1 Fault B1374 
B1379 Ignition 3 Fault B1379 
B1780 Radio VIN Data Mismatch (3)
B2532 Foglight Relay Output Short To Ground/Open B2532 
B2533 Foglight Relay Output Short To Battery (4)
B2558 Interior Light Control Output Short To Battery (5)
B2575 Headlight Control Circuit Open (4)
B2577 Headlight Control Circuit Open/Short To Ground (4)
B2578 Headlight Control Circuit Short To Battery (4)
B2585 Parklight Control Circuit Open/Short To Battery And Parklight Supply Voltage Circuit Open/Short To Ground (4)
B2587 Parklight Control Circuit Open/Short To Battery (4)
B2588 Parklight Control Circuit Short To Voltage (4)
B2600 Daytime Running Lights Power/Control Circuit(s) Open (4)
B2601 Daytime Running Lights Control Circuit Short To Ground (4)
B2602 Daytime Running Lights Control Circuit Short To Ground (4)
B2603 Daytime Running Lights Control Circuit Short To Battery (4)
B2647 Ambient Light Sensor Circuit Open/Short To Ground (4)
B2648 Ambient Light Sensor Circuit Short To Battery (4)
B2752 Horn Relay Coil Circuit Low (6)
B2753 Horn Relay Coil Circuit High (6)
B2947 Passlock(tm) Sensor Power Circuit Short To Ground (7)
B2948 Passlock(tm) Sensor Power Circuit Short To Battery (7)
B2957 Passlock(tm) Sensor Data Circuit Low (7)
B2958 Security System Sensor Data Circuit High (7)
B2960 Passlock(tm) Sensor Data Incorrect But Valid (7)
B2965 Key In Ignition Fault B2965 
B3031 BCM In Passlock(tm) Code Learn Mode (7)
B3033 Passlock(tm) Indicates Tamper (7)
B3127 Driver Door Only Unlock Circuit Low (8)
B3128 Driver Door Only Unlock Circuit High (8)
B3132 All Door Unlock Circuit Low (8)
B3133 All Door Unlock Circuit High (8)
B3137 All Door Lock Circuit Low (8)
B3138 All Door Lock Circuit High (8)
B3267 Trunk Lid Relay Output Short To Ground (8)
B3268 Trunk Lid Relay Output Short To Voltage (8)
C1214 Brake Control Relay Contact Circuit Open (9)
C1217 Brake Control Relay Coil Circuit Short To Ground (9)
C1218 Brake Control Relay Coil Circuit Short To Voltage (9)
C1221 Driver Front Wheel Speed Sensor Input Signal Is Zero (9)
C1222 Passenger Front Wheel Speed Sensor Input Signal Is Zero (9)
C1223 Driver Rear Wheel Speed Sensor Input Signal Is Zero (9)
C1224 Passenger Rear Wheel Speed Sensor Input Signal Is Zero (9)
C1225 Driver Front Excessive Wheel Speed Variation (9)
C1226 Passenger Front Excessive Wheel Speed Variation (9)
C1227 Driver Rear Excessive Wheel Speed Variation (9)
C1228 Passenger Rear Excessive Wheel Speed Variation (9)
C1232 Driver Front Wheel Speed Circuit Open/Short (9)
C1233 Passenger Front Wheel Speed Circuit Open/Short (9)
C1234 Driver Rear Wheel Speed Circuit Open/Short (9)
C1235 Passenger Rear Wheel Speed Circuit Open/Short (9)
C1236 Low System Supply Voltage (9)
C1237 High System Supply Voltage (9)
C1241 Variable Effort Steering Solenoid Circuit Open/Short (10)
C1242 Pump Motor Circuit Open (9)
C1243 Brake Pressure Modulator Valve Pump Motor Stalled (9)
C1245 High/Low Tire Pressure C1245 
C1247 Brake Fluid Level Sensor Signal Low
(11)
C1254 Keep Alive Memory Mismatch (9)
C1255 Or C1256 Electronic Brake Control Module Internal Malfunction (9)
C1261 Passenger Front Anti-Lock Brake System Motor Circuit Open (9)
C1262 Passenger Front Anti-Lock Brake System Motor Circuit Short To Ground (9)
C1263 Passenger Front Anti-Lock Brake System Motor Circuit Short To Voltage (9)
C1264 Rear Anti-Lock Brake System Motor Circuit Open (9)
C1265 Rear Anti-Lock Brake System Motor Circuit Short To Ground (9)
C1266 Rear Anti-Lock Brake System Motor Circuit Short To Voltage (9)
C1267 DTC U1300 Previously Stored (9)
C1268 DTC U1301 Previously Stored (9)
C1275 Powertrain Control Module Requested Enhanced Traction System To Be Disabled (9)
C1278 Enhanced Traction System Temporarily Inhibited By Powertrain Control Module (9)
C1287 Steering Position Sensor Out Of Range (10)
C1295 Brake Light Switch Circuit Open (9)
P0461 Fuel Level Sensor Performance (12)
P0462 Fuel Level Sensor Circuit Low Voltage (12)
P0463 Fuel Level Sensor Circuit High Voltage (12)
P0502 Low Transmission Output Shaft Speed Sensor (OSS) Output (13)
P0503 Loss Of Transmission Output Shaft Speed Sensor (OSS) Output (13)
P0560 Electrical System Voltage Out Of Range (14)
P0562 Electrical System Voltage Low (14)
P0563 Electrical System Voltage High (14)
P0620 Generator Turn-On Signal Circuit Voltage Low (14)
P0621 Generator Turn-On Signal Circuit Voltage Incorrect (14)
P0621 Generator Load Signal Incorrect (14)
P1189 Engine Oil Pressure Switch Circuit Voltage High (12)
P1554 Cruise Control Engaged Signal Malfunction (15)
P1585 Incorrect Cruise Control Inhibit Signal Circuit Voltage (15)
P1626 Theft Deterrent Fuel Enable Signal Not Received After Engine Start (7)
P1630 Theft Deterrent Learn Mode Active (7)
P1631 Theft Deterrent Start Enable Signal Not Correct (7)
P1632 Theft Deterrent Fuel Disable Signal Received (7)
PXXXX Powertrain (16)
U1000 & U1255 Class 2 Communication Malfunction U1000 & U1255 
U1001-U1254 Loss Of Communications With XXX U1001-U1254 
U1300 Class 2 Data Circuit Voltage Low Or High U1300, U1301 & 1305 
(1) For information on air bag DIAGNOSIS & TESTING, see AIR BAG RESTRAINT SYSTEMS article in RESTRAINTS.
(2) To diagnose IGNITION 0 circuit, see DTC B1369: IGNITION 0 FAULT  . DTC can only be retrieved as history DTC after communication with IPC has been restored. See DTC U1001-U1254: LOSS OF COMMUNICATIONS WITH XXX  . For more information, see DTC B1365 in INSTRUMENT PANELS - ALERO & GRAND AM article.
(3) Repair audio system as necessary.
(4) Diagnose and repair circuit as necessary. See HEADLIGHTS in appropriate SYSTEM WIRING DIAGRAMS article.
(5) Diagnose and repair circuit as necessary. See INTERIOR LIGHTS in appropriate SYSTEM WIRING DIAGRAMS article.
(6) Diagnose and repair horn circuit as necessary. See Diagnosis in HORNS - ALERO & GRAND AM article.
(7) See ANTI-THEFT SYSTEMS - ALERO & GRAND AM article.
(8) See POWER DOOR LOCKS - ALERO & GRAND AM article.
(9) See appropriate ANTI-LOCK article in BRAKES.
(10) See ELECTRONICS - VARIABLE EFFORT STEERING - ALERO & GRAND AM article in STEERING.
(11) Repair brake fluid level sensor circuit as necessary.
(12) See INSTRUMENT PANELS - ALERO & GRAND AM article.
(13) See appropriate DIAGNOSIS article in AUTOMATIC TRANSMISSIONS.
(14) See appropriate CHARGING SYSTEMS article.
(15) See CRUISE CONTROL SYSTEMS - 2002 ALERO & GRAND AM article.
(16) For powertrain control module diagnostic trouble code descriptions and testing procedures, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
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