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 Relay Contact Circuit Open

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 C1241 MAGNA STEER Circuit Malfunction in Variable Effort Steering

DTC C1242 BPMV Pump Motor Ground Circuit Open

DTC C1243 BPMV Pump Motor Stalled

DTC C1255 EBTCM Internal Malfunction

DTC C1256 EBCM 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 C1271 LF TCS Master Cylinder Isolation Valve Malfunction

DTC C1272 LF TCS Prime Valve Malfunction

DTC C1273 RF TCS Master Cylinder Isolation Valve Malfunction

DTC C1274 RF TCS Prime Valve Malfunction

DTC C1276 Delivered Torque Signal Circuit Malfunction

DTC C1277 Requested Torque Signal Circuit Malfunction

DTC C1278 TCS Temporarily Inhibited By PCM

DTC C1281 Steering Sensor Uncorrelated Malfunction

DTC C1281 Steering Sensor Uncorrelated Malfunction

DTC C1282 Yaw Rate Sensor Bias Circuit Malfunction

DTC C1283 Excessive Time to Center Steering

DTC C1284 Lateral Accelerometer Sensor Self Test Malfunction

DTC C1285 Lateral Accelerometer Sensor Circuit Malfunction

DTC C1286 Steering Sensor Bias Malfunction

DTC C1286 Steering/Lateral Accelerometer Sensor Bias Malfunction

DTC C1287 Steering Sensor Rate Malfunction

DTC C1287 Steering Sensor Rate Malfunction

DTC C1288 Steering Sensor Circuit Malfunction

DTC C1291 Open Brake Lamp Switch Contacts During Deceleration

DTC C1293 DTC C1291/C1292 Set in Current or Previous Ignition Cycle

DTC C1294 Brake Lamp Switch Circuit Always Active

DTC C1295 Brake Lamp Switch Circuit Open

DTC C1296 Master Cylinder Sensor Circuit Open or Shorted

DTC U1016 Loss of Communication with PCM. Refer to Diagnostic System Check - Data Link Communications in Wiring Systems.

DTC U1255 Generic Loss of Communications. Refer to Diagnostic System Check - Data Link Communications in Wiring Systems.

DTC U1300 Class 2 Short to Ground. Refer to Diagnostic System Check - Data Link Communications in Wiring System.

DTC U1301 Class 2 Circuit Short to Battery. Refer to Diagnostic System Check - Data Link Communications in Wiring System.