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Home >> Chrysler >> 2011 >> 300 Base, Gas >> Repair and Diagnosis >> External Pages >> Different car >> Section 100 (6.7L Diesel - DTCS - P21C4 To U1601 - 3500 Cab & Chassis) >> Diagnosis and Testing >> U0121-Lost Communication With Anti-Lock Brake Module >> Code Description >> When Monitored:

When Monitored:

WARNING: This page is about a different car, the 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

Ignition run time is greater than one second. Battery voltage between 9.0 and 16.0 Volts. Engine run time greater than three seconds.

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