AutoCodes – GMC – P020F 2018 GMC Sierra

P020F 2018 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 2018 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 190

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 2018 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 2018 GMC Sierra - Cylinder 6 Injection Timing - AutoCodes.com — P020F 2018 GMC Sierra Code - Cylinder 6 Injection Timing

What does this mean?

What are the Possible Causes of the DTC P020F 2018 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 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 P020F 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 P020F 2018 GMC Sierra code?

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Need Help with the 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 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code P020F on a 2018 GMC Sierra related to Cylinder 6 Injection Timing?

- Common symptoms include rough idling, engine misfires, decreased fuel efficiency, and potential stalling.

2. What are the possible causes of OBDII code P020F on a 2018 GMC Sierra indicating an issue with Cylinder 6 Injection Timing?

- Possible causes include a faulty fuel injector, wiring or electrical issues, a problem with the fuel delivery system, or issues with the engine control module.

3. How can I diagnose the OBDII code P020F on a 2018 GMC Sierra associated with Cylinder 6 Injection Timing?

- Diagnosis can involve using a scan tool to read the code, performing a visual inspection of the fuel injector and related components, checking for continuity in the wiring harness, and conducting fuel pressure tests.

4. Is it safe to continue driving my 2018 GMC Sierra with OBDII code P020F related to Cylinder 6 Injection Timing?

- It is not recommended to drive the vehicle as driving with a faulty fuel injector can lead to more severe engine damage and safety risks.

5. Can I repair OBDII code P020F on my 2018 GMC Sierra Cylinder 6 Injection Timing issue myself?

- While some simple repairs like checking and cleaning connections can be done by DIY enthusiasts, diagnosing and repairing complex issues may require professional help from a certified mechanic.

6. How much does it typically cost to fix OBDII code P020F on a 2018 GMC Sierra affecting Cylinder 6 Injection Timing?

- The cost of repairs can vary depending on the exact cause of the issue, but it can range from a few hundred to over a thousand dollars, including parts and labor.

7. Are there any preventive maintenance tips to avoid OBDII code P020F on a 2018 GMC Sierra Cylinder 6 Injection Timing problem?

- Regularly servicing the fuel injection system, using quality fuel, and addressing any engine issues promptly can help prevent OBDII code P020F and related problems.

8. Can resetting the OBDII system clear the P020F code on a 2018 GMC Sierra related to Cylinder 6 Injection Timing?

- While resetting the system may temporarily clear the code, it is essential to address the underlying issue causing the code to prevent it from reoccurring.

9. What are the potential long-term effects of ignoring OBDII code P020F on a 2018 GMC Sierra Cylinder 6 Injection Timing issue?

- Ignoring the code can lead to more severe engine damage, decreased performance, higher repair costs, and potential safety hazards on the road.

10. How soon should I address OBDII code P020F on my 2018 GMC Sierra related to Cylinder 6 Injection Timing after it appears?

- It is recommended to address the issue as soon as possible to prevent further damage to the engine and ensure the overall health and performance of the vehicle.