Diagnostic Trouble Code Definitions

2004 Oldsmobile Bravada RWDSECTION Diagnostic Trouble Code Definitions
WARNING: This page is about a different car, the 2002 GMC Savana, 2002 Chevrolet Chevy Express, 2001 GMC Savana, and 2001 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTC (1) Description Perform Test
B0688 Security Indicator Circuit Fault B0688 
B1007 Checksum Value Error B1007 
B2947 Passlock(tm) Sensor Power Circuit Low B2947 
B2948 Passlock(tm) Sensor Power Circuit High B2948 
B2957 Passlock(tm) Sensor Data Circuit Low B2957 
B2958 Passlock(tm) Sensor Data Circuit High B2958 
B2960 Passlock(tm) Sensor Data Incorrect But Valid B2960 
B3031 Controller In Learn Mode B3031 
B3033 System Indicates Tamper B3033 
C0559 EEPROM Checksum Error C0559 
P1626 Invalid Fuel Enable Password P1626 
P1630 Powertrain Control Module Unable To Learn Passlock(tm) Module Password P1630 
P1631 Invalid Password Received P1631 
(1) Codes listed in this table are only for testing covered in this article. For complete DTC listing, see BODY CONTROL MODULES - CHEVY EXPRESS & SAVANA article.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.