AutoCodes.com | All About OBDII Engine Codes
AutoCodes - Generic - P154D

P154D Code - Intake Air Heater Temperature Signal Circuit.

- Code Popularity: 9,297 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
Share on Facebook   Share on Twitter   Share on Linkedin

What are the Possible Causes of the DTC P154D?

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
⚠ Does your Car have Safety Recalls? → Check here

How to Fix the DTC P154D?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Search for P154D Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P154D code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

Code P154D Description

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). Power to the IAH is supplied by the battery positive voltage circuit. The IAH is connected to the GPCM by the following circuits. If there is a fault on any of these circuits a DTC will set.
- 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

OBDII Code P154D - Intake Air Heater Temperature Signal Circuit. - AutoCodes.com
P154D Code - Intake Air Heater Temperature Signal Circuit.

Need More Information on the Code?

Need more information on how to fix the P154D code? Get Access to Factory Service Manuals

Information for Specific Makes

Need Help with the Code?

Get the P154D code diagnosed by a professional: Find a repair shop in your area

Code P154D comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the P154D code? Have you replaced any parts?
Any information is appreciated. Thanks