Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1479 (ANTILOCK BRAKE SYSTEM, TRACTION CONTROL SYSTEM & STABILITY CONTROL SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC TROUBLE CODE (DTC) LIST
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Diagnostic Trouble Code (DTC) List
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Diagnostic Trouble Code (DTC) List
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
Diagnostic Trouble Code (DTC) List
| DTC | Description | Module(s) |
|---|---|---|
| DTC B2597 | Traction Control System Switch Circuit | BCM |
| DTC C1214 | System Relay Contact or Coil Circuit Open | EBCM |
| DTC C1217 | Pump Motor Shorted to Ground | EBCM |
| DTC C1218 | Pump Motor Circuit Shorted to Voltage or Motor Ground Open | EBCM |
| DTC C1221 | Left Front Wheel Speed Sensor Input Signal is 0 | EBCM |
| DTC C1222 | Right Front Wheel Speed Sensor Input Signal is 0 | EBCM |
| DTC C1223 | Left Rear Wheel Speed Sensor Input Signal is 0 | EBCM |
| DTC C1224 | Right Rear Wheel Speed Sensor Input Signal is 0 | EBCM |
| DTC C1225 | Left Front Excessive Wheel Speed Variation | EBCM |
| DTC C1226 | Right Front Excessive Wheel Speed Variation | EBCM |
| DTC C1227 | Left Rear Excessive Wheel Speed Variation | EBCM |
| DTC C1228 | Right Rear Excessive Wheel Speed Variation | EBCM |
| DTC C1232 | Left Front Wheel Speed Circuit Open or Shorted | EBCM |
| DTC C1233 | Right Front Wheel Speed Circuit Open or Shorted | EBCM |
| DTC C1234 | Left Rear Wheel Speed Circuit Open or Shorted | EBCM |
| DTC C1235 | Right Rear Wheel Speed Circuit Open or Shorted | EBCM |
| DTC C1236 | Low System Supply Voltage | EBCM |
| DTC C1237 | High System Supply Voltage | EBCM |
| DTC C1241 in Variable Effort Steering | Variable Effort Steering Circuit Malfunction | EBCM |
| DTC C1242 | Pump Motor Circuit Open | EBCM |
| DTC C1243 | BPMV Pump Motor Stalled | EBCM |
| DTC C1247 in Hydraulic Brakes | Brake Pressure Differential Switch Activated | EBCM |
| DTC C1248 | EBCM Turned the Red Brake Warning Indicator On | EBCM |
| DTC C1254 | Abnormal Shutdown Detected | EBCM |
| DTC C1255 | EBCM Internal Malfunction | EBCM |
| DTC C1256 | EBCM Internal Malfunction | EBCM |
| DTC C1261 | Left Front Inlet Valve Solenoid Malfunction | EBCM |
| DTC C1262 | Left Front Outlet Valve Solenoid Malfunction | EBCM |
| DTC C1263 | Right Front Inlet Valve Solenoid Malfunction | EBCM |
| DTC C1264 | Right Front Outlet Valve Solenoid Malfunction | EBCM |
| DTC C1265 | Left Rear Inlet Valve Solenoid Malfunction | EBCM |
| DTC C1266 | Left Rear Outlet Valve Solenoid Malfunction | EBCM |
| DTC C1267 | Right Rear Inlet Valve Solenoid Malfunction | EBCM |
| DTC C1268 | Right Rear Outlet Valve Solenoid Malfunction | EBCM |
| DTC C1271 | Left Front TCS Master Cylinder Isolation Valve Malfunction | EBCM |
| DTC C1272 | Left Front TCS Prime Valve Malfunction | EBCM |
| DTC C1273 | Right Front TCS Master Cylinder Isolation Valve Malfunction | EBCM |
| DTC C1274 | Right Front TCS Prime Valve Malfunction | EBCM |
| DTC C1276 | Delivered Torque Signal Circuit Malfunction | EBCM |
| DTC C1277 | Requested Torque Signal Circuit Malfunction | EBCM |
| DTC C1278 | TCS Temporarily Inhibited By PCM | EBCM |
| DTC C1281 | VSES Sensors Uncorrelated | EBCM |
| DTC C1282 | Yaw Rate Sensor Bias Circuit Malfunction | EBCM |
| DTC C1283 | Excessive Time to Center Steering | EBCM |
| DTC C1284 | Lateral Accelerometer Sensor Bias Malfunction | EBCM |
| DTC C1285 | Lateral Accelerometer Sensor Circuit Malfunction | EBCM |
| DTC C1286 | Steering Sensor Bias Malfunction | EBCM |
| DTC C1287 | Steering Sensor Rate Malfunction | EBCM |
| DTC C1288 | Steering Sensor Circuit Malfunction | EBCM |
| DTC C1291 | Open Brake Lamp Switch Contacts During Deceleration | EBCM |
| DTC C1292 | Brake Fluid Pressure Sensor Circuit | EBCM |
| DTC C1293 | Code C1291 Set in Previous Ignition Cycle | EBCM |
| DTC C1294 | Brake Lamp Switch Circuit Always Active | EBCM |
| DTC C1295 | Brake Lamp Switch Circuit Open | EBCM |
| DTC C1296 | Brake Fluid Pressure Sensor Circuit | EBCM |
| DTC P1571 | Traction Control Torque Request Circuit | PCM |
| DTC P1689 | Traction Control Delivered Torque Output Circuit | PCM |
RENDER: 1.0x
NO RELATED
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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.