Fault code P2676 – air cleaner inlet control circuit low

Fault code P2676 is called “Air Cleaner Inlet Control Circuit Low” but in different programs it may be called differently. This fault designation applies to all vehicles equipped with OBD-II.

Technical description and explained code P2676

Stored code P2676 means that the Powertrain Control Module (PCM) has detected a fault. Which is related to a low signal level in the air cleaner inlet control circuit.

Fault code P2676 – air cleaner inlet control circuit low

Modern vehicles of some brands are equipped with an air cleaner intake system that controls the air flow. The air flows through the intake air line and directly to the throttle body as well as the mass air flow sensor.

When the ignition key is turned to the ON position and voltage is applied to the various on-board controllers (including the PCM). Numerous self-diagnostic procedures are initiated.

The PCM uses input signals from the engine sensors to automatically set the engine start strategy and perform these self-tests. The air cleaner intake control circuit is one of the input signals required by the PCM for automatic tuning.

If the PCM detects the air cleaner inlet control circuit input signal is low. When the ignition switch is set to the ON position and voltage is applied to the PCM. Code P2676 will be stored and the malfunction indicator lamp may illuminate.

Not all first faults will set the code and illuminate the check lamp. In some cases, it takes several fault cycles before the indicator lamp will turn on.

Symptoms of vehicle malfunctions

The main signal that an error P2676 has occurred is the Malfunction Indicator Lamp (MIL) is also known as the CheckEngine Light.

It can also be warning signs such as:

  1. The “Check engine” control lamp on the control panel will illuminate (the code will be stored as a fault).
  2. There may be no symptoms other than the stored fault code.
  3. Longer than normal engine starting time.
  4. Floating revolutions, and attempts to stall while idling.
  5. Increased fuel consumption.

Fault P2676 is usually a moderate error, but can sometimes be serious depending on the specific symptoms of the malfunction. Therefore, when a problem is detected, it is recommended that the error is corrected as soon as possible.

Factors that can cause this error code

The error code P2676 can mean that one or more of the following problems have occurred:

  • Faulty air cleaner intake regulator.
  • Corroded or damaged connector.
  • Faulty or damaged wiring.
  • Damaged or clogged air duct.
  • Sometimes faulty PCM module is the cause.

How to fix or reset OBD-2 code P2676

Some suggested steps for troubleshooting and fix the error code P2676:

  1. Read all stored data and error codes with an OBD-II scan tool. To find out when and under what circumstances fault P2676 appeared.
  2. Clear the error codes from the computer memory and test-drive the vehicle to find out if the fault appears again.
  3. Visually inspect the electrical wires and connections related to the air cleaner intake regulator for looseness and damage.
  4. Clear the error code from the computer memory again, test drive the vehicle to see if the problem is resolved.

Diagnose and repair of problems

The first step in the P2676 troubleshooting process, is to review the maintenance bulletins (TSB). In some cases, this can save a lot of time in the long run by pointing you in the right direction.

The next step in diagnosis will be a visual inspection of the relevant harnesses and connectors. You should pay particular attention to the wiring near hot exhaust components and sharp edges.

If there is nothing wrong with the wiring, check the hoses for blockages or breaks and clean or replace them if necessary. High temperature silicone hoses should be used for replacement.

By following all the recommendations, the P2676 fault will most likely be corrected and will go away. If it does not, the problem may be a faulty PCM module.

On which vehicles does this problem occur most frequently

Fault code P2676 can occur on different vehicles but there are statistics on which brands this occurs most often. Here is a list of some of them:

  • Mazda (Mazda 6)

Fault code P2676 can sometimes be found with other errors. The most common are the following: P2675, P2677.


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