P040D Code: Easy Steps to Solve It
The P040D trouble code is a diagnostic trouble code (DTC) that indicates a problem with the Exhaust Gas Recirculation (EGR) Temperature Sensor “A” circuit. Specifically, this code signals that the engine control module (ECM) has detected a high voltage input from the EGR temperature sensor. The EGR system plays a crucial role in reducing emissions by recirculating a portion of the exhaust gases back into