P2608 - OBD Trouble Code

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The trouble code P2608 can be elucidated as Intake Air Heater “B” Circuit High. This code is a generic trouble code, meaning it applies to all vehicles equipped with the OBD-II system, especially those made from 1996 up to present. It’s also more common among Audi, Citroen, Chevrolet, Ford, Hyundai, Nissan, Peugeot, and Volkswagen vehicles. Specifications on the definition, troubleshooting, and repairs, of course, vary from one make and model, powertrain configuration type, to another.

Want to learn something more about the P2608 fault code? The P2608 error code would get stored when the powertrain control module would detect an irregular voltage reading originating from a certain intake air heater circuit.

What causes this problem with the Intake Air Heater “B” Circuit High?

• The heater element relay might be flawed
• Detective heater element
• The temperature sensor might be damaged
• A bad intake air heater blower
• Faulty or restricted air duct
• There can be distorted blower motor
• Unusable PCM/ECM

1. Engine Control Module - Most of the time it is difficult to intercept the ECM faults and thus must be checked for thoroughly. There can be a problem with the circuit or the software might have malfunctioned. Thus repair, replace or reprogram the component as per requirement.
2. Powertrain Control Module - If the PCM is faulty, it can stores wrong OBD codes and can lead to misdiagnosis. This can happen due to misinterpretation of data received from the various sensors and components which also affects the vehicle’s performance. Thus replace it immediately.
3. Intake Manifold Actuator – Actuator for an intake manifold tuning valve is used to regulate airflow in an intake manifold of an internal combustion engine. The actuator includes a motor, control circuit, and sensor all mounted in a housing that has an opening through which an output shaft extends. Thus, replace the faulty actuator immediately.
4. Intake Manifold - If a car is like your body, then the intake manifold is its lungs. The intake manifold is a series of tubes that distributes the air coming into the engine evenly to each of the cylinders, so that the right amount of air can mix with the right amount of gas. Thus, replace damaged intake manifold today!
5. Electronic Control Unit – If the ECU is at fault, it will not be able to read the boost converter temperatures correctly leading to underperformance. Thus, replace faulty ECU now!
6. Diagnostic Tool - Choose from our diagnostic tools collection that will come in handy to detect and correct the OBD error code.

You might be thinking that how would you diagnose these problems? We at Parts Avatar Canada would help you diagnose the major symptoms easily.

Common Symptoms

• The service engine soon light can start lighting up
• Issues in starting the car engine
• The cranking time may be longer than normal
• There might be rough idle at cold temperatures
• Engine delay

The repairs which you will have to do to correct this fault code are simply straightforward; you can surely pinpoint the necessary repairs on the basis of your diagnosis. Have a look at some common fixes:

• Repair or replace the quirky intake air heater blower
• Rehabilitate the defaults in the battery cable
• Carefully adjust the faults in the connections in the battery wires
• Recondition the non-functioning temperature sensor

There is no need to get strained if your OBD Code is still flashing up as we are here at your service. Have a look at our superior variety of intake air heater, intake air heater blower, heater element relay, air duct, blower motor, powertrain control module, digital voltmeter, intake air temperature sensor, intake air heater relay, body control module, pcm, ecm and many more. Now all your problems would vanish within no time.

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

Make sure to consult your vehicle information source for technical service bulletins (TSB) that replicate the code stored, vehicle (year, make, model, and engine), and symptoms exhibited. If you find the appropriate TSB, it may yield helpful diagnostic information. A diagnostic scanner and a digital volt/ohmmeter will be necessary to accurately diagnose a code P2608. A reliable source of vehicle information will also be needed. 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.

Basic Steps

• 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

Advanced Steps

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:

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 P2608 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.