P0068 2018 GMC Sierra Code - Throttle Body Air Flow Performance
Quick Answer
The Engine Control Module (ECM) compares actual air flow based on Throttle Position (TP) to a calculated air flow based on the Manifold Absolute Pressure (MAP) sensor, and Mass Air Flow (MAF). Common causes include Air leak between the Mass Air Flow (MAF) sensor and Throttle Body, Restricted Air Filter, Dirty Throttle Body. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0068 2018 GMC Sierra indicates Throttle Body Air Flow Performance.
- Common causes
- Common causes include Air leak between the Mass Air Flow (MAF) sensor and Throttle Body, Restricted Air Filter, Dirty Throttle Body.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0068 2018 GMC Sierra Description
What are the Possible Causes of the DTC P0068 2018 GMC Sierra?
- Air leak between the Mass Air Flow (MAF) sensor and Throttle Body
- Restricted Air Filter
- Dirty Throttle Body
- Dirty Mass Air Flow sensor
- Faulty Mass Air Flow sensor
- Faulty Manifold Absolute Pressure (MAP)
- Faulty Throttle Body
How to Fix the DTC P0068 2018 GMC Sierra?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0068 2018 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P0068 2018 GMC Sierra code?
Need more information on how to fix the P0068 2018 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0068 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0068 2018 GMC Sierra Code
1. What are the common symptoms of OBDII code P0068 in a 2018 GMC Sierra related to throttle body air flow performance?
The common symptoms include poor acceleration, rough idling, reduced fuel efficiency, and the illumination of the Check Engine Light.
2. What can cause the OBDII code P0068 in a 2018 GMC Sierra?
The code P0068 is often triggered by a faulty throttle body, a dirty or clogged air filter, a vacuum leak, or issues with the mass airflow sensor.
3. How can I diagnose the underlying issue triggering code P0068 in my 2018 GMC Sierra?
To diagnose the issue, you can inspect the throttle body for any signs of damage or malfunction, check the air filter for dirt or clogs, inspect the vacuum hoses for leaks, and test the mass airflow sensor for proper functioning.
4. Can I drive my 2018 GMC Sierra with OBDII code P0068?
It is not recommended to drive your vehicle with code P0068 as it can lead to further damage and affect the performance of your vehicle. It's best to address the issue promptly.
5. How can I repair OBDII code P0068 in my 2018 GMC Sierra related to throttle body air flow performance?
The repair process may involve cleaning or replacing the throttle body, replacing the air filter, fixing any vacuum leaks, or replacing the mass airflow sensor, depending on the underlying cause.
6. Can a DIY enthusiast fix OBDII code P0068 in a 2018 GMC Sierra?
While some basic maintenance tasks like cleaning the throttle body or replacing the air filter can be done by a DIY enthusiast, diagnosing and repairing complex issues related to code P0068 may require professional assistance.
7. Will resetting the OBDII code P0068 in my 2018 GMC Sierra make it go away permanently?
Resetting the code may temporarily turn off the Check Engine Light, but if the underlying issue triggering the code is not addressed, it is likely to reappear.
8. Is it safe to ignore OBDII code P0068 in my 2018 GMC Sierra?
Ignoring code P0068 can lead to reduced engine performance, decreased fuel efficiency, and potential long-term damage to engine components. It's best to address the issue promptly.
9. How much does it typically cost to repair OBDII code P0068 in a 2018 GMC Sierra at a dealership or auto repair shop?
The cost of repairing code P0068 can vary depending on the underlying cause and the rates of the dealership or auto repair shop. It's advisable to get a diagnostic and repair estimate from a professional.
10. Can a faulty throttle body cause code P0068 in a 2018 GMC Sierra to reoccur even after repair?
Yes, if the underlying issue, such as a faulty throttle body, is not properly addressed during the repair, code P0068 may reoccur. It's crucial to ensure that all potential causes are thoroughly inspected and repaired.
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