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Home >> Jeep >> 2018 >> Grand Cherokee Laredo, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (3.0L Diesel - DTCS P1693-00 To P2200-00) >> DTC Troubleshooting >> P20EE-00-SCR NOX Catalyst Efficiency Below Threshold Bank 1 >> Set Condition

Set Condition

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The PCM uses the (upstream) NOx Sensor 1/1 and the (downstream) NOx Sensor 1/2 feedback to calculate the NOx efficiency. The PCM also factors in engine operating and environmental conditions to calculate the DEF dosing rate. The PCM sets this DTC if the NOx Conversion Efficiency is below a calculated threshold target. The PCM will turn on the Malfunction Indicator Lamp (MIL) immediately after the monitor runs and fails.

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