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Diagnostic Trouble Code Definitions

CONTROL MODULE ACRONYM DEFINITIONS

Acronym Definition
ALC Automatic Level Control Module
AMP or RIM Radio Interface Module
BCM Body Control Module
ECM Engine Control Module
EBCM Electronic Brake Control Module
HVAC Heating & A/C Control Module
IPC Instrument Panel Cluster
IRC Integrated Radio Chassis
PCM Powertrain Control Module
PSCM Power Steering Control Module
SDM SIR Sensing & Diagnostic Module
SIR Supplemental Inflatable Restraint
SCM Seat Control Module
TCM Transmission Control Module
VCU Vehicle Communication Unit
VIU Vehicle Interface Unit
VTD Vehicle Theft Deterrent Control Module
DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTC Description Module
001 (1) Internal ALC Hardware Or Software Error ALC
002 (1) ALC Detects High Battery Voltage ALC
003 (1) ALC Detects High/Low Battery Voltage ALC
004 (1) High Voltage Not Detected At ALC Relay Output ALC
005 (1) Ground Not Detected At ALC Relay Output ALC
006 (1) Low Feedback Voltage Detected During Exhaust Valve OFF State ALC
007 (1) Ground Not Detected At Exhaust Valve Solenoid Output ALC
008 (1) ALC Indicator Light Power Circuit Fault ALC
009 (1) ALC Indicator Light Ground Circuit Fault ALC
010 (1) ALC Compressor Active For More Than 3 Minutes ALC
011 (1) ALC Exhaust Valve Active For More Than 5 Minutes ALC
011 (2) Memory Seat Adjuster Motor/Position Sensor Fault SCM
011 (3) No Valid Key Transponder Signal VTD
012 (2) Memory Seat Adjuster Motor/Position Sensor Fault SCM
012 (3) No Valid Key Transponder Signal VTD
013 (3) Security Code Not Programmed In VTD VTD
014 (4) Engine Coolant Temperature Gauge Circuit Fault IPC
014 (3) No Valid Key Transponder Signal VTD
015 (3) Open/Short To Ground In ECM/TCM Code Circuit VTD
016 (2) Memory Seat Adjuster Motor/Position Sensor Fault SCM
016 (3) Short To B+ In ECM/TCM Code Circuit VTD
017 (2) Memory Seat Adjuster Motor/Position Sensor Fault SCM
017 (3) VTD Did Not Receive Code Request Signal From ECM VTD
018 (3) Inaccurate/Erratic Code Request Signal From ECM VTD
021 (2) Memory Seat Adjuster Switch Fault SCM
050 or 055 (2) Driver Seat Adjuster Memory Module Fault SCM
051 (4) EEPROM Not Programed Or Internal Fault Exists IPC
052 (4) EEPROM Partially Programmed IPC
055  SDM Control Module Internal Fault Detected SDM
055  VTD Control Module Internal Fault Detected VTD
167 (4) Fuel Gauge Circuit Fault (Short To Ground) Or Fuel Sensor Out Of Range (Less Than 30 Ohms For More Than 8 Seconds) IPC
168 (4) Fuel Gauge Circuit Fault (Open/Short To B+) Or Fuel Sensor Out Of Range (More Than 350 Ohms For More Than 8 Seconds) IPC
BXXXX (7) Body Control Module DTCs BCM
B1552  Loss Of BCM Keep Alive Memory (KAM) BCM
B1556  BCM, EEPROM Write Error BCM
B1558  BCM, EEPROM Checksum Error BCM
B1760  CD Changer Not Responding Radio
B1780  Theft Lock Enabled Radio
B1970  Exterior Light Power Fault BCM
B1971  Inadvertent Power Fault BCM
B1973  High Power Control Fault BCM
B1982  Battery Voltage Too High - BCM & IRC BCM & IRC
B1983  Battery Voltage Too Low - BCM & IRC BCM & IRC
B2462  GPS Antenna Signal Error OnStar(R) VIU
B2470  Daytime Running Lights Fault BCM
B2471  Interior Lights Fault BCM
B2472  Low Beam Fault BCM
B2473  High Beam Fault BCM
B2476  Parking Lights Fault - BCM BCM
B2476  OnStar(R) Keypad Button Assembly Fault OnStar(R) VIU, Phone
B2556  EEPROM Error BCM
B2560  Remote Keyless Entry Message Validation Error BCM
C0035-51 (5) No Or Invalid Wheel Speed Sensor Signal EBCM
C0060-95 (5) Solenoid Valve Circuit Fault (Open, Short To Ground, Short to B+) EBCM
C0110 (5) Present Of Pump Motor Voltage Out Of Allowed Range EBCM
C0121 (5) B+ Is Present/Not Present At Solenoid Valves When Valve Relay Is Commanded OFF/ON EBCM
C0141-156 (5) Isolation & Prime Valve Circuit Fault EBCM
C0161 (5) Stoplight Switch Circuit Fault EBCM
C0245 (5) EBCM Detects Wheel Speed Sensor Deviation EBCM
C0550 (5) An Internal EBCM Fault Exists EBCM
C0800 (5) EBCM Ignition Operating Voltage Out Of Range EBCM
PXXXX (6) ECM/PCM DTCs ECM
P0460 (6) Fuel Level Sensor Voltage Out Of Range At ECM ECM
P0571 (6) ECM Detects Closed Cruise Control Release Switch When Switch Should Be Open ECM
P0705 (6) Transmission Position Switch Indicates Undefined Or Invalid Gear Position For 20 Seconds ECM
P1501 (3) Theft Deterrent Code Not Programmed Into ECM ECM
P1502 (3) Theft Deterrent Code Not Received By ECM ECM
P1503 (3) Code In ECM Does Not Match Code Signal ECM
P1662 (6) CRUISE Indicator Control Circuit Fault ECM
UXXXX (7) Communication DTCs BCM, EBCM, ECM, Radio, TCM
U1000 & U1255  Class 2 Communication Fault BCM, IRC, VIU, Phone
U1001-U1254  Loss Of XXX Communications BCM, IRC, Phone, VIU
U1300  Class 2 Short To Ground BCM, IRC, VIU, Phone
U1301  Class 2 Short To Battery BCM, IRC, VIU, Phone
U1500 VIU Detects No Communication Between VIU & VCU OnStar(R) VIU
U2100  CAN-BUS Communication Fault EBCM, ECM, TCM
U2103  Fewer Controllers On Bus Than Programmed EBCM, ECM
U2104  CAN Bus Reset Counter Overrun EBCM, ECM, TCM
U2105  Lost Communication With Engine Control Module (ECM) EBCM, TCM
U2106  Lost Communication With Transmission Control System (TCM) EBCM, ECM
U2108  Lost Communication With ABS Control System (EBCM) ECM, TCM
(1) See ELECTRONIC - AUTOMATIC LEVEL CONTROL - CATERA article in SUSPENSION.
(2) See POWER SEATS - CATERA article.
(3) See ANTI-THEFT SYSTEM - CATERA or REMOTE KEYLESS ENTRY SYSTEMS - CATERA article.
(4) See ANALOG INSTRUMENT PANELS - CATERA article.
(5) See ANTI-LOCK/TCS - CATERA article in BRAKES.
(6) See SELF-DIAGNOSTICS - 3.0L CATERA article in ENGINE PERFORMANCE.
(7) BXXXX DTCs refer to body control systems faults. For DTCs not listed, see appropriate article in ACCESSORIES & EQUIPMENT related to customer concern. PXXXX DTCs refer to engine control systems. For DTCs not listed, see appropriate diagnostic system check article in ENGINE PERFORMANCE. UXXXX DTCs refer to communication fault between various control modules. For DTCs not listed, see system in which customer concern is apparent.