P2606 OBD Error Code: Problem & Solutions

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The trouble code P2606 can be explained as Intake Air Heater “B” Circuit Range/Performance. This diagnostic fault code is a generic powertrain code, which means that it would apply to the OBD-II equipped vehicles. The specific repair steps can vary as it depends upon the vehicle make and model. One thing which you must keep in mind that its symptoms as well as causes would surely vary as it depends upon a number of things. The intake air heater “B” circuit is being monitored by the engine control module. This trouble code would be set by the ECM when the intake air heater “B” circuit would not be as per the specifications set by the manufacturer.

This trouble code is generic, which would mean that it can apply to all the vehicles which are equipped with the OBD-II or the vehicles which are made since 1996 up to the present. The specifications on the definition, the troubleshooting steps as well as repairs can always vary from one vehicle make to another. This can happen because of a lot of reasons and the mechanic should diagnose the specific cause for this code.

What causes this problem with the Intake Air Heater “B” Circuit Range/Performance?

• Unusable heater element relay
• Detective heater element
• Malfunctioning temperature sensor
• Faulty intake air heater blower
• Imperfect or restricted air duct
• There can be distorted Blower motor
• Broken PCM

1. Intake Manifold Actuator – The actuator is responsible to handle the opening and closing of the intake valve and is also used to determine its position. Thus, if the actuator is at fault, the air to fuel ratio may change, causing serious performance issues. Buy new actuator and replace the faulty one now!
2. Engine Control Module – ECM faults are rare but can be a big problem as faulty ECM will cause wrong vehicle operations and can also result in wrong OBD codes getting stored in the system which can also cause misdiagnosis. Thus, replace faulty ECM components now!
3. Intake Valve – An Intake Valve is a spring action valve that is placed on a cylinder head of an internal combustion engine just next to the spark plug and exhaust valve. Its main purpose is to allow the proper amount of air-fuel mixture to enter inside the cylinder when the complete movement cycle of piston from TDC (top dead center) to BDC (Bottom Dead Center) and back to TDC takes place. Thus, replace damaged valve today!
4. Electronic Control Unit – The ECU coordinates with the temperature sensor to control the blower fan for keeping the battery temperatures under control. So, replace faulty ECU components now!
5. Intake Manifold - When the intake manifold fails, it can leave the engine without the increased performance, and in some cases even reduce performance. Usually a faulty intake manifold will produce a few symptoms that can alert the driver of a potential issue. Thus, replace damaged component now!
6. Powertrain Control Module – Check for PCM error which might be due to circuit faults that might require complete replacement and reprogramming. Replace it now!
7. Diagnostic Tool - In order to detect the error, one needs high grade diagnostic tools. Visit us today to grab amazing deals.

It is vital to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P2606 here:

Common Symptoms

• Appearance of the service engine soon light
• The car engine might not start
• Prolonged cranking time
• Bumpy idle at cold temperatures
• Engine hindering

Looking out for some ways with the help of which you can correct this fault code? Then you have arrived at the correct place. We are here to help you out, so you must check out the steps mentioned below as follows:

• Repair or replace the quirky temperature sensor
• Rehabilitate the defaults in the engine control module
• The malfunctioning intake air heater blower should be repaired or replaced as per the need
• The wires or other electrical components should be restored to working order

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Here are some steps which you should follow in order to diagnose this fault code:

Get your vehicle specific Technical Service Bulletins (TSB) and see if you can find the code and ways to resolve it there. The TSB will be source of reference through the diagnostic procedure. Make sure you match the TSB’s accurately with your vehicles, year, make, model and engine details. The intake air heating circuit may not work automatically if the ambient air or engine temperature is above the limit which is set by the manufacturer. The circuit should activate if it is commanded "ON" with a scanner, or if power is applied manually.

• Inspect the heater element, is it turning "ON" NOTE: Do not touch element or heat shield
• Make sure to examine the blower motor, is it turning "ON"
• The circuit connections and wiring for obvious defects should be visually inspected
• It is essential to visually inspect the condition of the air ducts for obvious defects
• Examine electrical connections for security and corrosion

The advanced steps become very vehicle specific and need the appropriate advanced equipment to perform in the right way. There would be a need of a digital multimeter and the specific technical references to carry out this procedure. Voltage requirements will vary depending upon the specific year, make and model of the vehicle.

Specific checks should be performed by utilizing the troubleshooting guidelines for the particular vehicle using the technical manual or online reference material. These steps will guide you through the process of inspecting the power and ground to each component within the intake air heater circuit in the proper sequence. If the voltage is right to a component that is not functioning, then it would mean that the part is most likely faulty and it should be restored. If power is not available to operate the circuit, continuity checks would be required to identify defective wiring or components.

Common Mistakes When Diagnosing The P2606 Code

• There are a lot of mechanics who would simply rush into the judgement that the intake air heater is faulty, but they should keep in mind that the repair might have a temporary effect, but then this error code would return again. It is essential to test each and every possibility for why the component is not working properly to make sure it is fixed properly the first time.