Retrieving Trouble Codes

1998 Buick RivieraSECTION Retrieving Trouble Codes

Connect Tech 1 scan tool into Data Link Connector (DLC) located under left side of instrument panel. Follow scan tool manufacturer's instructions to retrieve stored fault codes.

If multiple codes are displayed, begin diagnosis with code that is displayed first. See DIAGNOSTIC TROUBLE CODES (DTC)  table. Diagnose all codes in the order displayed by Tech 1 scan tool.

DIAGNOSTIC TROUBLE CODE (DTC)

DTC (1) Definition
C1211  Valve Supply Voltage Interruption
C1215  Suspect Valve Malfunction
C1221  Right Front Wheel Speed Sensor Circuit Open Or Shorted
 
C1222 
Right Front Wheel Speed Sensor Signal Intermittent
C1223  Right Front Wheel Speed Sensor Signal Missing
C1225  Left Front Wheel Speed Sensor Circuit Open Or Shorted
C1226  Left Front Wheel Speed Sensor Signal Intermittent
C1227  Left Front Wheel Speed Sensor Signal Missing
C1231  Right Rear Wheel Speed Sensor Circuit Open Or Shorted
C1232  Right Rear Wheel Speed Sensor Signal Intermittent
C1233  Right Rear Wheel Speed Sensor Signal Missing
C1235  Left Rear Wheel Speed Sensor Circuit Open Or Shorted
C1236  Left Rear Wheel Speed Sensor Signal Intermittent
C1237  Left Rear Wheel Speed Sensor Signal Missing
C1241  Right Front Inlet Valve Circuit Malfunction
C1242  Right Front Outlet Valve Circuit Malfunction
C1244  Left Front Isolation Valve Circuit Malfunction
C1245  Left Front Inlet Valve Circuit Malfunction
C1246  Left Front Outlet Valve Circuit Malfunction
C1248  Right Front Isolation Valve Circuit Malfunction
C1251  Right Rear Inlet Valve Circuit Malfunction
C1252  Right Rear Outlet Valve Circuit Malfunction
C1255  Left Rear Inlet Valve Circuit Malfunction
C1256  Left Rear Outlet Valve Circuit Malfunction
C1261  Pump Motor Run Malfunction
C1262  Pump Pressure Malfunction During ABS Stop
C1271  EBCM/EBTCM Internal Malfunction
C1272  TCC/Anti-Lock Brake Switch Circuit Malfunction
C1273  BPMV Fluid Level Switch Circuit Malfunction
C1274  BPMV Pressure Switch Circuit Malfunction
C1275  PCM Requested TCS To Be Disabled
C1276  Serial Data Malfunction
C1277  Delivered Torque Signal Circuit Malfunction
C1278  Requested Torque Signal Circuit Malfunction
C1281  Brake Thermal Model Limit Exceeded
(1) Always perform diagnostic system check before diagnosing DTCs. See DIAGNOSTIC SYSTEM CHECK.
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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.