P0068 Code – Manifold absolute pressure (MAP) sensor/mass air flow (MAF) sensor/throttle position correlation

The P0068 code is an OBD-II diagnostic trouble code that indicates a problem with the throttle body airflow performance. When this code is triggered, it means that the Engine Control Module (ECM) has detected an abnormally high airflow reading from the throttle body. The throttle body is responsible for controlling the amount of air entering the engine to maintain proper combustion and performance.

This DTC typically points to a potential issue with the throttle body itself, such as a malfunctioning throttle position sensor or a faulty motor. It could also indicate a problem with the intake manifold or a vacuum leak in the system. In some cases, a dirty or clogged air filter may disrupt the airflow and trigger this code.

Fixes for OBD-II Code P0068

Fixing the P0068 DTC (Diagnostic Trouble Code) requires a systematic approach to identify and address the underlying issue with the throttle body airflow performance. Here are some steps that can be taken to fix the code:

  1. Inspection: Begin by inspecting the throttle body and its components for any signs of damage, wear, or blockages. Check for loose connections, damaged wiring, or vacuum leaks that could affect the throttle body’s operation.

  2. Clean or replace the throttle body: If the throttle body is dirty or clogged, it can cause improper airflow and trigger the P0068 code. In such cases, cleaning the throttle body using a throttle body cleaner can help restore its functionality. If cleaning doesn’t resolve the issue, it may be necessary to replace the throttle body altogether.

  3. Check the throttle position sensor (TPS): The TPS is responsible for monitoring the position of the throttle plate. A malfunctioning TPS can lead to incorrect readings and trigger the P0068 code. Test the TPS using a multimeter (go to review) or consult the vehicle’s service manual for specific testing procedures. If the TPS is faulty, it should be replaced.

  4. Address vacuum leaks: Vacuum leaks in the intake manifold or associated vacuum lines can disrupt the airflow and trigger the P0068 code. Inspect the vacuum lines for any cracks, leaks, or loose connections. Replace or repair any damaged components as necessary.

  5. Clear the code: After addressing the underlying issue, use an OBD-II scanner or diagnostic tool to clear the P0068 code from the vehicle’s ECM memory. This will reset the system and allow you to verify if the issue has been resolved.

It’s important to note that the complexity of the repair process may vary depending on the specific vehicle make and model. If you’re unsure about performing these steps yourself, it’s recommended to consult a qualified mechanic or technician

Related DTCs to P0068

There are some codes that likely would have been shown along with the aforementioned code: P0100, P0101, P0102, P0103, P0104, P0105, P0106, P0107, P0108, P0109, P0120, P0121, P0122, P0123, P0124.

FAQs

The cost of fixing the P0068 code can vary depending on several factors, including the make and model of the vehicle, the underlying cause of the issue, and labor rates in your area. Since the P0068 code is related to the throttle body airflow performance, the cost of repairs may involve different components or systems.

In some cases, the issue may be resolved by cleaning the throttle body or addressing vacuum leaks, which are relatively inexpensive repairs. However, if the throttle body needs to be replaced, the cost can be higher, including the price of the new part and labor charges.  As well as the throttle position sensor (TPS) need replacement, it will add to the overall cost.

Throttle body replacement costs can range from $200 to $600 or more, depending on the vehicle and whether the part is genuine OEM or aftermarket. Additionally, if other components or wiring need to be repaired or replaced, it can add to the overall cost.

It is not recommended to continue driving with the P0068 code without addressing the underlying issue.

Driving with a faulty throttle body can result in various symptoms, including reduced engine power, rough idle, poor acceleration, and potentially stalling. The vehicle may experience hesitation or difficulty starting.

Ignoring the issue and continuing to drive with the P0068 code could potentially lead to further damage to the engine or other components.

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