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P154B Diagnostic Trouble Code Discussion for March 2019

Intake Air (IA) Heater Signal Circuit Malfunction

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Trouble Ticket Help Requests for DTC P154B
Help Request Posted
2015 Chevrolet Silverado 2500 HD LT 6.6L MIL Lamp on VIN: 1GC1KVE84F
P154B: . Came in with codes P154B,P154B replaced intake air heater .The truck came back with P154B.Checked 175 amp fuse powers and grounds to glow plug module.Replaced relay for gpm.load tested 6 wires between iah andgpm.Replaced glow plug mod reflashed, still same...
March 31, 2019