Mike's Workshop Manuals
: Service manuals for every vehicle
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Jeep
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2012
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Liberty Limited Jet, 4WD, Part Time
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Repair and Diagnosis
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Engine Performance
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System
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3.7L - DTCS P2100 To U1418
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Diagnosis And Testing
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U0121-Lost Communication With Anti-Lock Brake Module
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Possible Causes
Possible Causes
Possible Causes
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
CAN C BUS CIRCUITS OPEN OR SHORTED
ABS MODULE POWER AND GROUND
ABS MODULE
POWERTRAIN CONTROL MODULE (PCM)