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.
2004 Chevrolet S10 PickupFACTORY OEM SERVICE PROCEDURE
Anti-Lock Brake DTCS
ANTI-LOCK BRAKE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| DTC C0221 | Right Front Wheel Speed Sensor Circuit Open |
| DTC C0222 | Right Front Wheel Speed Signal Missing |
| DTC C0223 | Right Front Wheel Speed Signal Erratic |
| DTC C0225 | Left Front Wheel Speed Sensor Circuit Open |
| DTC C0226 | Left Front Wheel Speed Signal Missing |
| DTC C0227 | Left Front Wheel Speed Signal Erratic |
| DTC C0229 | Drop Out of Front Wheel Speed Signals |
| DTC C0235 | Rear Wheel Speed Signal Circuit Open |
| DTC C0236 | Rear Wheel Speed Signal Circuit Missing |
| DTC C0237 | Rear Wheel Speed Signal Erratic |
| DTC C0238 | Wheel Speed Mismatch |
| DTC C0241 | EBCM Control Valve Circuit |
| DTC C0245 | Wheel Speed Sensor Frequency Error |
| DTC C0254 | EBCM Control Valve Circuit |
| DTC C0265 | EBCM Relay Circuit |
| DTC C0266 | EBCM Relay Circuit |
| DTC C0267 | Pump Motor Circuit Open/Shorted |
| DTC C0268 | Pump Motor Circuit Open/Shorted |
| DTC C0269 | Excessive Dump/Isolation Time |
| DTC C0271 | EBCM Malfunction |
| DTC C0272 | EBCM Malfunction |
| DTC C0273 | EBCM Malfunction |
| DTC C0274 | Excessive Dump/Isolation Time |
| DTC C0281 | Brake Switch Circuit |
| DTC C0284 | EBCM Malfunction |
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.