AutoCodes – Generic – P2606

P2606 Code - Intake Air Heater 'B' Circuit Range/Performance

Quick Answer

The Engine Control Module (ECM) uses an Intake Air Heater (IAH) to warm the incoming air for proper cylinder combustion. Common causes include Faulty Intake Air Heater (IAH) Relay, Faulty Intake Air Heater, Intake Air Heater Relay harness is open or shorted. 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
P2606 indicates Intake Air Heater 'B' Circuit Range/Performance.
Common causes
Common causes include Faulty Intake Air Heater (IAH) Relay, Faulty Intake Air Heater, Intake Air Heater Relay harness is open or shorted.
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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 6,287
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jan 19, 2019
πŸ’¬ Need more help? Ask Coddy for instant answers β€” it's free!

Code P2606 Description

The Engine Control Module (ECM) uses an Intake Air Heater (IAH) to warm the incoming air for proper cylinder combustion. The ECM grounds the control coil of the IAH relay to energize the heater during cold operation. The control module will command the IAH ON when the engine coolant temperature is below 40 C (104 F). The power to the IAH heater is supplied by the battery positive voltage circuit through the IAH relay.
OBDII Code P2606 - Intake Air Heater 'B' Circuit Range/Performance - AutoCodes.com
P2606 Code - Intake Air Heater 'B' Circuit Range/Performance

What are the Possible Causes of the DTC P2606?

  • Faulty Intake Air Heater (IAH) Relay
  • Faulty Intake Air Heater
  • Intake Air Heater Relay harness is open or shorted
  • Intake Air Heater Relay circuit poor electrical connection
  • Intake Air Heater harness is open or shorted
  • Intake Air Heater circuit poor electrical connection

How to Fix the DTC P2606?

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2606 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P2606 code?

Need more information on how to fix the P2606 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2606 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

  • P2606 Chevrolet β€” Intake Air Heater 'B' Circuit Range/Performance
  • P2606 Dodge β€” Intake Air Heater 'B' Circuit Range/Performance
  • P2606 Ford β€” Intake Air Heater 'B' Circuit Range/Performance
  • P2606 GMC β€” Intake Air Heater 'B' Circuit Range/Performance
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.

Frequently Asked Questions about P2606 Code

1. What are common symptoms of OBDII code P2606?

- Common symptoms include rough idling, decreased engine performance, slow warm-up of the engine, and increased fuel consumption.

2. What does the OBDII code P2606 indicate?

- OBDII code P2606 indicates an issue with the intake air heater 'B' circuit, specifically relating to range/performance problems.

3. What are possible causes of OBDII code P2606?

- Possible causes include a faulty intake air heater relay, damaged wiring or connectors in the intake air heater circuit, or a malfunctioning intake air temperature sensor.

4. How can I diagnose the source of OBDII code P2606?

- Diagnosing the issue involves using a scan tool to retrieve the code, checking the intake air heater relay and related wiring for damage, and testing the intake air temperature sensor for proper function.

5. Can I drive my vehicle with OBDII code P2606?

- It is not recommended to drive the vehicle with OBDII code P2606 as it can lead to decreased performance and potential engine damage.

6. How can I repair OBDII code P2606?

- Repairing the issue may involve replacing the faulty intake air heater relay, repairing damaged wiring or connectors, or replacing the intake air temperature sensor.

7. Are there any DIY tips for fixing OBDII code P2606?

- DIY tips include checking and cleaning the intake air heater circuit connections, ensuring proper voltage supply to the circuit, and inspecting for any visible damage.

8. Will OBDII code P2606 cause my check engine light to illuminate?

- Yes, OBDII code P2606 will trigger the check engine light to illuminate on the dashboard to alert you of the intake air heater circuit range/performance issue.

9. Can a mechanic easily reset OBDII code P2606 after repairs?

- Yes, a mechanic can reset the OBDII code P2606 using a scan tool after the necessary repairs have been made to the intake air heater circuit.

10. Is it necessary to address OBDII code P2606 immediately?

- It is recommended to address OBDII code P2606 promptly to prevent further damage to the engine and ensure optimal vehicle performance.

Discuss the causes and fixes for P2606 OBDII Code

AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play