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Home >> Chrysler >> 2025 >> Pacifica Plug-In Hybrid Pinnacle >> Repair and Diagnosis >> Brakes >> Anti-Lock Brakes >> Anti-Lock Brakes (Abs) - DTCS B1783-01 To C0039-02 >> DTC Troubleshooting >> C0021-02 Brake Booster - General Signal Failure >> Possible Causes

Possible Causes

Possible Causes
PINCHED, CUT OR OPEN VACUUM SUPPLY LINE
BRAKE BOOSTER
VACUUM PRESSURE SENSOR

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to:  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .

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