DTC P154B GMC
Intake Air (IA) Heater Voltage Signal Circuit
Intake Air (IA) Heater Voltage Signal Circuit
Description
The intake air heater is commanded ON. The glow plug control module battery voltage is between 9.5-15 V. DTC P154B runs continuously when the above condition is met.
Cause and Solution
DTC will set when any of the following conditions exists:Intake air heater voltage is greater than 16 V while the glow plug control module voltage is between 9.5-14 V for more than 650 ms.Intake air heater voltage is less than 6.9 V while the glow plug control module voltage is between 9.5-16 V for more than 1000 ms.Intake air heater signal voltage is greater than 1.5 V after the intake air heater has been commanded OFF for more than 65 ms.
Video Guide
Diagnostic Info
- DTC Code: P154B
- Brand: GMC