Engine-Codes - Chevrolet - P154B Chevrolet

P154B Chevrolet Code - Intake Air Heater Voltage Signal Circuit

- Code Popularity: 15,598 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P154B Chevrolet?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Intake Air Heater
  • Intake Air Heater harness is open or shorted
  • Intake Air Heater circuit poor electrical connection
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How to Fix the DTC P154B Chevrolet?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P154B Chevrolet code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the P154B Chevrolet Code Mean?

The Intake Air Heater (IAH) is located in the air inlet tube and is used to warm the incoming air to aid in starting the engine and for proper cylinder combustion. The Glow Plug Control Module (GPCM) will command the IAH ON when the engine coolant temperature is below 40°C (104°F). The IAH is connected to the GPCM by the following circuits:
- The IAH temperature signal circuit
- The IAH command 1 circuit
- The IAH command 2 circuit
- The IAH voltage signal circuit
- The IAH current signal circuit
- The IAH feedback signal circuit

P154B Chevrolet Code - Intake Air Heater Voltage Signal Circuit

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