16452/P0068/000104 DTC Code


In the world of automotive diagnostics, trouble codes are essential for identifying and resolving issues within vehicles. One particular trouble code that mechanics and car enthusiasts often come across is the 16452/P0068/000104 DTC code. In this article, we will provide a comprehensive overview of this specific DTC code, discussing its meaning, possible causes, symptoms, and potential solutions.

Understanding the 16452/P0068/000104 DTC Code

The 16452/P0068/000104 DTC code is associated with a problem related to the Mass or Volume Air Flow ‘A’ Circuit Low input. This code is typically triggered when the powertrain control module (PCM) detects an unusually low input from the mass air flow (MAF) sensor or the manifold absolute pressure (MAP) sensor. These sensors play a crucial role in determining the amount of air entering the engine, which is vital for proper fuel combustion and engine performance.

Common Causes of the 16452/P0068/000104 DTC Code

  1. Faulty Mass Air Flow Sensor: One of the primary causes behind this DTC code is a malfunctioning mass air flow sensor. If the sensor is dirty, damaged, or worn out, it may provide inaccurate readings to the PCM, triggering the trouble code.

  2. Manifold Absolute Pressure Sensor Issues: Another possible cause is a faulty manifold absolute pressure (MAP) sensor. Similar to the MAF sensor, if the MAP sensor is defective or giving incorrect readings, it can lead to the activation of the 16452/P0068/000104 trouble code.

  3. Vacuum Leaks: Vacuum leaks in the intake system can disrupt the air-to-fuel ratio, affecting the MAF or MAP sensor inputs. These leaks can arise from a damaged intake manifold gasket, cracked vacuum hoses, or loose connections.

  4. Faulty Wiring or Electrical Connections: Damaged or loose electrical connections, as well as faulty wiring, can interfere with the signals sent by the MAF or MAP sensors, resulting in the activation of the DTC code.

  5. Air Filter Contamination: An excessively dirty or clogged air filter can restrict the flow of air to the engine, leading to abnormal sensor readings and the generation of the 16452/P0068/000104 code.

Symptoms of the 16452/P0068/000104 DTC Code

When the 16452/P0068/000104 DTC code is present within the vehicle’s system, certain symptoms may become noticeable. These symptoms can include:

  • Check Engine Light: The illumination of the check engine light on the dashboard is a common indication that a trouble code, such as the 16452/P0068/000104, has been triggered.

  • Reduced Engine Performance: Since the MAF and MAP sensors are crucial for delivering the appropriate air-fuel mixture to the engine, any anomaly in their readings can result in reduced engine performance, such as decreased acceleration or power.

  • Engine Stalling or Rough Idle: In some cases, vehicles experiencing this trouble code may exhibit irregular idling or even stall during operation, indicating a disruption in the air intake system.

  • Poor Fuel Efficiency: When the air-to-fuel ratio is not accurately measured and maintained due to this fault code, it can lead to suboptimal fuel combustion, resulting in decreased fuel efficiency.

Resolving the 16452/P0068/000104 DTC Code

Addressing the 16452/P0068/000104 DTC code requires a systematic approach to troubleshooting and resolving the underlying issues. Here are some possible solutions:

1. Inspect and Clean/Replace the Mass Air Flow Sensor

Start by inspecting the MAF sensor for any visible signs of damage or contamination. If the sensor is dirty, try cleaning it using specialized MAF sensor cleaner spray. However, if the sensor is heavily soiled or damaged, it may be necessary to replace it. Always consult the vehicle’s repair manual or seek professional assistance for the correct replacement procedure.

2. Check the Manifold Absolute Pressure Sensor

Similar to the MAF sensor, visually inspect the MAP sensor for any signs of damage or wear. Clean any debris or oil contamination if present. If cleaning doesn’t resolve the issue, consider replacing the MAP sensor. Again, refer to the vehicle’s repair manual for the correct replacement steps.

3. Detect and Fix Vacuum Leaks

Thoroughly examine the intake system for any potential vacuum leaks. Inspect the intake manifold gasket, vacuum hoses, and connections for damage or looseness. Replace any defective components and ensure all connections are secure.

4. Verify Wiring and Electrical Connections

Inspect the wiring and electrical connections related to the MAF and MAP sensors. Check for any loose, damaged, or corroded connections. Repair or replace the wiring as needed and ensure proper connections are established.

5. Replace the Air Filter

Inspect the air filter for excessive dirt, contamination, or damage. If it appears dirty, consider replacing it with a new, OEM-specified filter. Regularly replacing the air filter at the recommended intervals can help prevent this issue from recurring.

Frequently Asked Questions

Q1: Can I drive my vehicle with the 16452/P0068/000104 DTC code?

A1: It is generally not recommended to drive the vehicle with an active trouble code, including the 16452/P0068/000104 DTC code. It is essential to diagnose and address the underlying issue as soon as possible to prevent potential engine damage or further complications.

Q2: How much does it cost to repair the 16452/P0068/000104 DTC code?

A2: The cost of repairing the 16452/P0068/000104 DTC code can vary significantly depending on factors such as the cause of the issue, the vehicle make and model, and the labor rates at your location. It is advisable to consult a qualified mechanic or service center, who can provide a more accurate estimate based on your specific circumstances.

Q3: Can I reset the 16452/P0068/000104 DTC code by disconnecting the battery?

A3: While disconnecting the battery may temporarily clear the trouble code, it does not address the underlying issue causing the fault. The DTC code will likely reappear once the problem persists. It is recommended to have the vehicle diagnosed and repaired properly to ensure a reliable resolution.

In conclusion, the 16452/P0068/000104 DTC code indicates a problem with the Mass or Volume Air Flow ‘A’ Circuit Low input. By understanding its causes, symptoms, and potential solutions, you can take the necessary steps to diagnose and resolve this issue accurately. Remember, if you’re unsure or need assistance, consult a qualified automotive professional to ensure proper repairs are performed and to maintain the safety and reliability of your vehicle.

About author


Meet Sam Mitchell, your experienced and reliable guide in the complex world of car fault codes. With a robust career spanning over 15 years as a professional car mechanic, John has the skills, knowledge, and practical experience to help you navigate car fault issues with confidence.


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