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Home >> Dodge and Ram >> 2020 >> Durango R/T, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 21 (3.6L - DTCS P2166 To U01B0) >> DTC Troubleshooting >> P258B-Electronic Vacuum Pump Performance >> Possible Causes

Possible Causes

WARNING: This page is about a different variant/trim than selected.
Possible Causes
FUSED B+ CIRCUIT OPEN
ELECTRIC VACUUM PUMP OUTPUT CIRCUIT OPEN
ELECTRIC VACUUM PUMP OUTPUT CIRCUIT SHORTED TO GROUND
GROUND CIRCUIT OPEN
PINCHED, CUT OR OPEN VACUUM SUPPLY LINE
VACUUM PRESSURE SENSOR
BRAKE VACUUM BOOSTER
ELECTRIC VACUUM PUMP
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

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