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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1161 (Antilock Brake System) >> Diagnostic Information and Procedures >> DTC C1221 To C1235: Wheel Speed Sensor >> Diagnostic Aids >> C1225 through C1228

C1225 through C1228

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A possible cause of this DTC is electrical noise on the wheel speed sensor harness wiring. Electrical noise could result from the wheel speed sensor wires being routed to close to high energy ignition system components, such as spark plug wires.