Mike's Workshop Manuals
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Pontiac
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2008
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G8 Base
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Repair and Diagnosis
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Brakes
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Anti-Lock Brake System, Traction Control System & Stability Control System
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Diagnostic Information and Procedures
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DTC C0121
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Conditions for Setting the DTC
Conditions for Setting the DTC
The EBCM detects an open in the B+ circuit to the solenoid valve relay.
The EBCM detects a stuck open solenoid valve relay or an open circuit between the solenoid valve relay and solenoid valves.