Mike's Workshop Manuals
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Pontiac
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2008
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Grand Prix 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 commands the solenoid valve relay on and battery voltage is not present at the solenoid valves.
The EBCM commands the solenoid valve relay off and battery voltage is present at the solenoid valves.