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Home >> Chrysler >> 2011 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 276 (Antilock Brake System (Abs) - Electrical Diagnostics - 1500) >> Diagnosis And Testing >> C0021-02-Brake Booster - General Signal Failure >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2013 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes 
PINCHED, CUT OR OPEN VACUUM SUPPLY LINE
BRAKE BOOSTER
VACUUM PRESSURE SENSOR