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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1574 (6.7L Diesel - DTCS P20B7 To P24A0 - 2500 Hd) >> DTC Troubleshooting >> P20B9-REDUCTANT Heater "A" Control Circuit/Open >> When Monitored

When Monitored

WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

There are two different monitoring conditions. The First Monitor: When the ignition is on. The Second Monitor: When the ignition is on and the DEF Pressure Line Heater is commanded on.

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