AutoCodes – GMC – P020F 2017 GMC Sierra

P020F 2017 GMC Sierra Code - Cylinder 6 Injection Timing

Quick Answer

The Engine Control Module (ECM) has the ability to learn injector timing performance. Common causes include Faulty Fuel Injector 6, Fuel Injector 6 harness is open or shorted, Fuel Injector 6 circuit poor electrical connection. 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: P020F 2017 GMC Sierra indicates Cylinder 6 Injection Timing.
Common causes: Common causes include Faulty Fuel Injector 6, Fuel Injector 6 harness is open or shorted, Fuel Injector 6 circuit poor electrical connection.
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 145

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 22, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P020F 2017 GMC Sierra Description

The Engine Control Module (ECM) has the ability to learn injector timing performance. When the engine is at operating temperature, throttle closed and in deceleration fuel cut-off mode, the ECM will pulse each injector individually and measure the changes in rotational speed of the crankshaft using the input from the crankshaft position sensor. The ECM will run this diagnostic at one fuel rail pressure operating point for each injector. The ECM stores the injector timing value. The Diagnostic Trouble Code (DTC) will be set when the time to build up sufficient current to open the injector is below or above a predetermined threshold.

OBDII Code P020F 2017 GMC Sierra - Cylinder 6 Injection Timing - AutoCodes.com — P020F 2017 GMC Sierra Code - Cylinder 6 Injection Timing

What does this mean?

What are the Possible Causes of the DTC P020F 2017 GMC Sierra?

Faulty Fuel Injector 6
Fuel Injector 6 harness is open or shorted
Fuel Injector 6 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P020F 2017 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 P020F 2017 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 P020F 2017 GMC Sierra code?

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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 P020F 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code P020F in a 2017 GMC Sierra related to Cylinder 6 Injection Timing?

- Common symptoms may include rough idle, engine misfires, decreased fuel efficiency, and potentially stalling.

2. What are the possible causes of OBDII code P020F in a 2017 GMC Sierra indicating an issue with Cylinder 6 Injection Timing?

- Potential causes include a faulty fuel injector, wiring issues, a problem with the engine control module (ECM), or fuel system issues.

3. How can I diagnose the OBDII code P020F in my 2017 GMC Sierra that points to Cylinder 6 Injection Timing problems?

- Diagnosing this code typically involves checking the Cylinder 6 fuel injector, inspecting wiring for any damage, and verifying the ECM operation using a diagnostic scanner.

4. Is it safe to drive my 2017 GMC Sierra with OBDII code P020F related to Cylinder 6 Injection Timing?

- It is not recommended to drive the vehicle with this code present, as it can lead to further engine damage and potential safety hazards.

5. What repair steps can be taken to address OBDII code P020F in a 2017 GMC Sierra linked to Cylinder 6 Injection Timing issues?

- Repair steps may involve replacing the faulty fuel injector, repairing damaged wiring, resetting the ECM, and clearing the trouble code with a diagnostic tool.

6. Can a DIY enthusiast fix OBDII code P020F in a 2017 GMC Sierra related to Cylinder 6 Injection Timing problems?

- While some may attempt DIY repairs, it is advised to consult a qualified mechanic or technician due to the complexity of diagnosing and repairing fuel injection issues.

7. How much should I expect to pay for repairing OBDII code P020F in a 2017 GMC Sierra associated with Cylinder 6 Injection Timing faults?

- Repair costs can vary significantly depending on the exact cause of the issue, but expenses may include parts like fuel injectors and labor for diagnostic tests and repairs.

8. Are there any preventive maintenance tips to avoid encountering OBDII code P020F in a 2017 GMC Sierra affecting Cylinder 6 Injection Timing?

- Regularly servicing the fuel system, using high-quality fuel, and promptly addressing any engine performance issues can help prevent Cylinder 6 Injection Timing problems.

9. Can a software update or ECM reprogramming fix OBDII code P020F in a 2017 GMC Sierra related to Cylinder 6 Injection Timing?

- In some cases, updating the ECM software may resolve the issue, but it is crucial to first diagnose the root cause of the trouble code to determine the most appropriate solution.