How To Fix P20E1 Code - Exhaust Aftertreatment Fuel Pressure Sensor Circuit
Автор: Car Cure
Загружено: 2026-01-25
Просмотров: 3
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If you drive a modern diesel truck and are experiencing power loss or black smoke, learning how to fix P20E1 code faults is critical for maintaining your exhaust system. This code points to an intermittent or erratic signal from the Exhaust Aftertreatment Fuel Pressure Sensor, which is responsible for managing the Diesel Exhaust Fluid (DEF) injection. When this circuit fails, your Selective Catalyst Reduction (SCR) system stops working correctly, which can put your truck into limp mode to protect the engine. This video covers the step-by-step troubleshooting process, starting with a visual inspection of the wiring harnesses near the exhaust which are prone to melting or vibration damage. We also show you how to use a scan tool to monitor freeze frame data and how to perform voltage drop tests on the sensor circuit. Don't risk thousands of dollars in damage to your DPF or catalytic converter; follow these steps to determine if you need a new sensor, a wiring repair, or a DEF pump replacement to clear this severe code and get back on the highway.
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