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Discussion Starter · #1 ·
More def problems. At 47K miles I got the MIL light. The code was P20BD which is: Reductant Heater B Control Circuit/Open. The Jeep still runs but starts to run a little rough at low idle after a couple hundred miles. Apparently this a sensor within the def tank and sensor is not a simply plug-n-play but requires this part to be replaced.
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