GM Service Manual Online
For 1990-2009 cars only

DTC Number/Description

DTC C1214 Solenoid Valve Relay Contact or Coil Circuit Open

DTC C1217 Pump Motor Shorted to Ground

DTC C1218 Pump Motor Circuit Shorted to Voltage

DTC C1221 LF Wheel Speed Sensor Input Signal is 0

DTC C1222 RF Wheel Speed Sensor Input Signal is 0

DTC C1223 LR Wheel Speed Sensor Input Signal is 0

DTC C1224 RR Wheel Speed Sensor Input Signal is 0

DTC C1225 LF Excessive Wheel Speed Variation

DTC C1226 RF Excessive Wheel Speed Variation

DTC C1227 LR Excessive Wheel Speed Variation

DTC C1228 RR Excessive Wheel Speed Variation

DTC C1232 LF Wheel Speed Circuit Open or Shorted

DTC C1233 RF Wheel Speed Circuit Open or Shorted

DTC C1234 LR Wheel Speed Circuit Open or Shorted

DTC C1235 RR Wheel Speed Circuit Open or Shorted

DTC C1236 Low System Supply Voltage

DTC C1237 High System Supply Voltage

DTC C1238 Brake Thermal Model Exceeded

DTC C1242 Pump Motor Circuit Open

DTC C1243 BPMV Pump Motor Stalled

DTC C1245 Low Tire Pressure Detected. Refer to Tire Pressure Monitoring in Suspension.

DTC C1247 Low Brake Fluid Detected

DTC C1254 Abnormal Shutdown Detected

DTC C1255 EBCM/EBTCM Internal Malfunction

DTC C1256 EBCM/EBTCM Internal Malfunction

DTC C1261 LF Inlet Valve Solenoid Malfunction

DTC C1262 LF Outlet Valve Solenoid Malfunction

DTC C1263 RF Inlet Valve Solenoid Malfunction

DTC C1264 RF Outlet Valve Solenoid Malfunction

DTC C1265 LR Inlet Valve Solenoid Malfunction

DTC C1266 LR Outlet Valve Solenoid Malfunction

DTC C1267 RR Inlet Valve Solenoid Malfunction

DTC C1268 RR Outlet Valve Solenoid Malfunction

DTC C1272 LF TCS Valve Solenoid Malfunction

DTC C1274 RF TCS Valve Solenoid Malfunction

DTC C1275 PCM Requested ETS to Be Disabled

DTC C1276 Delivered Torque Signal Circuit Malfunction

DTC C1277 Requested Torque Signal Circuit Malfunction

DTC C1278 TCS Temporarily Inhibited By PCM

DTC C1291 Open Brake Lamp Switch Contacts During Deceleration

DTC C1293 Code C1291 Set in Previous Ignition Cycle

DTC C1294 Brake Lamp Switch Circuit Always Active

DTC C1295 Brake Lamp Switch Circuit Open

DTC C1298 PCM Class 2 Serial Data Link Malfunction

DTC U1016 Loss of Communications with PCM . In Data Link Communications.

DTC U1255 Serial Data Line Malfunction . In Data Link Communications.

DTC U1300 Class 2 Short to Ground . In Data Link Communications.

DTC U1301 Class 2 Short to Battery . In Data Link Communications.