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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 92 (Engine Controls And Fuel - 2.8L (LWN) Diesel - Diagnostic Information And Procedures (1 Of 3)) >> Diagnostic Information and Procedures >> DTC P026A >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

The engine control module (ECM) monitors the ambient air temperature, and the charge air temperature before and after the charge air cooler to calculate the efficiency of the charge air cooler (CAC). The charge air cooler systems' function is to reduce the temperature of the induction air charge that is heated by the turbocharger to improve the efficiency and performance of the engine.

The charge air cooler inlet temperature sensor, located at the outlet of the turbocharger, the charge air cooler outlet temperature sensor, located near the intake air flow valve are variable resistors. The ECM supplies 5 V to the signal circuit, and a ground for the sensors' low reference circuits.

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