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Wrangler Sahara, Standard Trans
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Different car
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Section 123 (Body Control Module (BCM) - DTCS B1812-2A To U1433-24)
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DTC Troubleshooting
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U0121-00-Lost Communication With Anti-Lock Brake System (Abs) Control Module
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Possible Causes
Possible Causes
WARNING:
This page is about a different car, the 2016 Dodge Journey and 2015 Dodge Journey. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes
ANTI-LOCK BRAKE SYSTEM MODULE (ABS) POWERS AND GROUNDS
ANTI-LOCK BRAKE SYSTEM MODULE (ABS)
CAN C BUS (+) CIRCUIT OPEN
CAN C BUS (-) CIRCUIT OPEN