GM Service Manual Online
For 1990-2009 cars only

DTC

Definition

C1214

DTC C1214 Solenoid Valve Relay Contact or Coil Circuit Open

C1217

DTC C1217 Pump Motor Relay Contact Circuit Open

C1221

DTC C1221 LF Wheel Speed Sensor Input Signal is 0

C1222

DTC C1222 RF Wheel Speed Sensor Input Signal is 0

C1223

DTC C1223 LR Wheel Speed Sensor Input Signal is 0

C1224

DTC C1224 RR Wheel Speed Sensor Input Signal is 0

C1225

DTC C1225 LF Excessive Wheel Speed Variation

C1226

DTC C1226 RF Excessive Wheel Speed Variation

C1227

DTC C1227 LR Excessive Wheel Speed Variation

C1228

DTC C1228 RR Excessive Wheel Speed Variation

C1232

DTC C1232 LF Wheel Speed Circuit Open or Shorted

C1233

DTC C1233 RF Wheel Speed Circuit Open or Shorted

C1234

DTC C1234 LR Wheel Speed Circuit Open or Shorted

C1235

DTC C1235 RR Wheel Speed Circuit Open or Shorted

C1236

DTC C1236 Low System Supply Voltage

C1237

DTC C1237 High System Supply Voltage

C1241

DTC C1241 Magna Steer Circuit Malfunction. Refer to Variable Effort Steering in Steering

C1242

DTC C1242 BPMV Pump Motor Ground Circuit Open

C1243

DTC C1243 BPMV Pump Motor Stalled

C1255

DTC C1255 EBTCM Internal Malf

C1256

DTC C1256 EBTCM Internal Malfunction

C1261

DTC C1261 LF Inlet Valve Solenoid Malfunction

C1262

DTC C1262 LF Outlet Valve Solenoid Malfunction

C1263

DTC C1263 RF Inlet Valve Solenoid Malfunction

C1264

DTC C1264 RF Outlet Valve Solenoid Malfunction

C1265

DTC C1265 LR Inlet Valve Solenoid Malfunction

C1266

DTC C1266 LR Outlet Valve Solenoid Malfunction

C1267

DTC C1267 RR Inlet Valve Solenoid Malfunction

C1268

DTC C1268 RR Outlet Valve Solenoid Malfunction

C1273

DTC C1273 TCS Master Cylinder Isolation Valve Malf

C1274

DTC C1274 TCS Prime Valve Malfunction

C1276

DTC C1276 Delivered Torque Signal Circuit Malfunction

C1277

DTC C1277 Requested Torque Signal Circuit Malfunction

C1278

DTC C1278 TCS Temporarily Inhibited By PCM

C1281

DTC C1281 Steering Sensor Uncorrelated Malfunction

C1286

DTC C1286 Steering Sensor Bias Malfunction

C1287

DTC C1287 Steering Sensor Rate Malfunction

C1288

DTC C1288 Steering Sensor Circuit Malfunction

C1291

DTC C1291 Open Brake Lamp Switch Contacts During Deceleration

C1293

DTC C1293 Code C1291 Set in Previous Ignition Cycle

C1294

DTC C1294 Brake Lamp Switch Circuit Always Active

C1295

DTC C1295 Brake Lamp Switch Circuit Open

U1016

DTC U1016 Loss of Communications with PCM

U1255

DTC U1255 Generic Loss of Communications

U1300

DTC U1300 Class 2 Circuit Shorted to Ground. Refer to Data Link Communications System Check in Wiring Systems

U1301

DTC U1301 Class 2 Circuit Shorted to Battery. Refer to Data Link Communications System Check in Wiring Systems