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Home >> Jeep >> 2005 >> Wrangler Rubicon, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 555 (DTCS P2503 To U1411) >> Diagnosis And Testing >> U0121-Lost Communication With Anti-Lock Brake Module >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2005 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes 
CAN C BUS OPEN OR SHORTED CONDITION
ABS MODULE
FCM
PCM


Refer to  ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS  for diagnostic procedures and for further possible causes. 

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