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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Automatic Transmission - 8L90 (M5U MQD) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P1840, P1841, P18B9, P18BE, or P18C3 >> Conditions for Setting the DTC

Conditions for Setting the DTC

WARNING: This page is about a different variant/trim than selected.

DTC P1840 

Internal Mode Switch S = Less than 0.7 V - For greater than 2 s

DTC P1841 

Internal Mode Switch S = Greater than 2.38 V - For greater than 2 s

DTC P18B9 

Internal Mode Switch S = 1.0 to 1.7 V - For greater than 2 s

DTC P18BF 

Internal Mode Switch S = Invalid - For greater than 2 s

DTC P18C3 

Internal Mode Switch S = Invalid - For greater than 3 s

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