AutoCodes – Chevrolet – P0068 2018 Chevrolet Silverado

P0068 2018 Chevrolet Silverado 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 Chevrolet Silverado 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.

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Code Popularity 491

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 16, 2022

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
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Code P0068 2018 Chevrolet Silverado Description

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). The Diagnostic Trouble Code (DTC) will be set if the ECM detects that the actual air flow rate is greater than the calculated air flow.

OBDII Code P0068 2018 Chevrolet Silverado - Throttle Body Air Flow Performance - AutoCodes.com — P0068 2018 Chevrolet Silverado Code - Throttle Body Air Flow Performance

What does this mean?

What are the Possible Causes of the DTC P0068 2018 Chevrolet Silverado?

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 Chevrolet Silverado?

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 Chevrolet Silverado 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 Chevrolet Silverado code?

Need more information on how to fix the P0068 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0068 2018 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0068 2018 Chevrolet Silverado Code

1. What does the OBDII code P0068 mean on a 2018 Chevrolet Silverado?

P0068 indicates a mismatch between the throttle position sensor (TPS), manifold absolute pressure (MAP) sensor, and mass airflow (MAF) sensor readings, suggesting a problem with throttle body air flow performance.

2. What are the symptoms of the P0068 code on a 2018 Chevy Silverado?

Common symptoms include the check engine light turning on, poor engine performance, reduced fuel efficiency, stalling, or hesitation during acceleration.

3. What causes the P0068 code to appear in a 2018 Chevrolet Silverado?

Possible causes include a faulty throttle body, dirty MAF sensor, malfunctioning MAP sensor, air intake leaks, or wiring and connector issues related to these sensors.

4. Can a dirty air filter trigger the P0068 code?

Yes, a clogged or excessively dirty air filter can restrict airflow and lead to inaccurate sensor readings, potentially triggering the P0068 code.

5. How do I fix the P0068 code on my 2018 Chevy Silverado?

Begin by cleaning the MAF sensor and inspecting the air intake system for leaks or blockages. If the issue persists, test and replace faulty sensors or the throttle body as needed.

6. Can I drive with the P0068 code on my Silverado?

Driving with the P0068 code is not recommended as it can lead to poor performance, increased fuel consumption, and potential damage to the engine if left unresolved.

7. How do you diagnose the P0068 code on a 2018 Chevrolet Silverado?

A mechanic will use a scan tool to check live sensor data, inspect the air intake system for leaks, test the throttle body, and verify the functionality of the MAF and MAP sensors.

8. Is a throttle body replacement always necessary for the P0068 code?

No, a throttle body replacement is not always necessary. The issue could stem from sensor malfunctions, air intake leaks, or clogged components, which should be addressed first.

9. How much does it cost to repair the P0068 code on a 2018 Chevy Silverado?

Repair costs can range from $100 to $400, depending on whether cleaning, sensor replacement, or throttle body replacement is required.

10. Can a software update fix the P0068 code on my 2018 Silverado?

In some cases, a PCM (powertrain control module) software update may fix the P0068 code if itâ€™s caused by a programming issue. Consult a dealership or qualified technician for this solution.