Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSDODGE AND RAM2013JOURNEY CREW, AWDREPAIR AND DIAGNOSISSUSPENSIONWHEELS & TIRE SYSTEM(TIRE PRESSURE MODULE (TPM) - ELECTRICAL DIAGNOSTICS)DTC TROUBLESHOOTINGU0121-00-LOST COMMUNICATION WITH ANTI-LOCK BRAKE SYSTEM (ABS) CONTROL MODULEDIAGNOSTIC TEST
2013 Dodge and Ram Journey Crew, AWD
Diagnostic Test
2013 Dodge and Ram Journey Crew, AWDSECTION Diagnostic Test
- VERIFY THE DTC IS ACTIVE
- Turn the ignition on.
- With the scan tool, read active DTCs.
Is the DTC active at this time?
Yes
- Refer to the DTC INDEX and perform the U0121-00-Lost Communication with Anti-lock Brake System (ABS) Module diagnostic procedure.
No
- Refer to DIAGNOSIS AND TESTING and perform the Stored Lost Communication DTCs diagnostic procedure.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.