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Engine-Codes – Generic – P2605

P2605 Code - Intake Air Heater 'B' Circuit/Open

Quick Answer

The P2605 diagnostic trouble code (DTC) refers to an issue with the Intake Air Heater 'B' Circuit/Open. Common causes include Faulty intake air heater relay, Damaged heater element, Wiring issues. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P2605 indicates Intake Air Heater 'B' Circuit/Open.
Common causes
Common causes include Faulty intake air heater relay, Damaged heater element, Wiring issues.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 18, 2024
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Code P2605 Description

The P2605 diagnostic trouble code (DTC) refers to an issue with the Intake Air Heater 'B' Circuit/Open. This code indicates that there is a problem with the intake air heater system in the vehicle. The intake air heater is responsible for warming up the air that enters the engine, especially in cold weather conditions. When the intake air heater circuit is open or malfunctioning, it can lead to a variety of performance issues in the vehicle.

OBDII Code P2605 - Intake Air Heater 'B' Circuit/Open
P2605 Code - Intake Air Heater 'B' Circuit/Open

Common Causes of P2605

  1. Faulty intake air heater relay
  2. Damaged heater element
  3. Wiring issues
  4. Defective intake air heater control module

Symptoms of P2605

  1. Reduced engine power
  2. Rough idling
  3. Increased emissions
  4. Engine stalling
  5. Check Engine Light illuminated

How to Fix P2605

  1. Begin by conducting a thorough inspection of the intake air heater system to identify the specific cause of the issue.
  2. Test the intake air heater relay and replace it if found to be faulty.
  3. Inspect the heater element for any damage and replace it if necessary.
  4. Check the wiring harness for any breaks or shorts and repair or replace as needed.
  5. If the intake air heater control module is defective, replace it with a new one.

Cost to Fix P2605

The typical repair costs for addressing the P2605 code related to the Intake Air Heater 'B' Circuit/Open can vary depending on the specific cause of the issue and the vehicle's make and model. On average, the repair costs for this type of problem can range from $200 to $500, including parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate.

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Code P2605 Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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