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.
2003 Chevrolet Impala LSFACTORY OEM SERVICE PROCEDURE
Anti-Lock Brake DTCS
ANTILOCK BRAKE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| DTC B2747 | Ground On Traction Control Switch Signal Circuit |
| DTC C1214 | Difference Between The Ignition Voltage And System Voltage |
| DTC C1216 | Solenoid Of The Wheel Is Releasing For Greater Than 1 Second |
| DTC C1217 | Pump Motor Voltage |
| DTC C1218 | Pump Motor Voltage |
| DTC C1221, C1222, C1223, C1224, C1225, C1226, C1227, C1228, C1229, C1230, C1231, C1232, C1233, C1234, C1235 | Wheel Speed Sensor |
| DTC C1236 | System Voltage |
| DTC C1237 | System Voltage High |
| DTC C1238 | Estimated Brake Rotor Temperature High |
| DTC C1242 or C1243 | Pump Motor Is Stalled Or Turning Slowly |
| DTC C1248 | Two Wheel Speed Sensor DTCs On The Same Axle Set |
| DTC C1254 | KAM & Checksum Mismatch |
| DTC C1255 or C1256 | Internal EBCM Malfunction |
| DTC C1261, C1262, C1263, C1264, C1265, C1266, C1267, C1268, C1269, C1270, C1271, C1272, C1273, C1274 | Driver State Mismatch |
| DTC C1276, P1644, or P1689 | Delivered Torque Signal |
| DTC C1277 or P1571 | Requested Torque Signal Circuit |
| DTC C1278 | Engine Control Portion Of The Traction Control Function |
| DTC C1291 | Stop Lamp Switch Remains Open |
| DTC C1294 | Stop Lamp Switch Signal |
| DTC C1295 | Stop Lamp Switch Input Voltage |
| DTC C1298 | PCM Does Not Receive Any Messages From EBCM |
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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