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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 215 (Engine Control System (DTC/Circuit Diagnosis) (CUMMINS 5.0L) (2 Of 6)) >> DTC/Circuit Diagnosis >> DTC P026A-00: Charge Air Cooler Efficiency Below Normal >> DTC Description >> Notes

DTC Description: Notes

WARNING: This page is about a different car, the 2018 Nissan Titan XD. However, it is still accessible from the selected car via links, so may be relevant.

The ECM supplies 5V to the Charge Air Cooler outlet temperature signal circuit, and monitors the change in voltage caused by changes in the resistance of the sensor to determine the Charge Air Cooler outlet temperature. When the intake air is cold, the sensor (or thermistor) resistance is high. The ECM signal voltage only pulls down a small amount through the sensor to a ground. Therefore, the ECM senses a high signal voltage or low temperature. When the intake air is warm, the sensor resistance is low. The signal voltage pulls down a large amount. Therefore, the ECM senses a low signal voltage, or a high temperature.

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