AutoCodes – GMC – P020C 2018 GMC Sierra

P020C 2018 GMC Sierra Code - Cylinder 3 Injection Timing

Quick Answer

The Engine Control Module (ECM) has the ability to learn injector timing performance. Common causes include Faulty Fuel Injector 3, Fuel Injector 3 harness is open or shorted, Fuel Injector 3 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: P020C 2018 GMC Sierra indicates Cylinder 3 Injection Timing.
Common causes: Common causes include Faulty Fuel Injector 3, Fuel Injector 3 harness is open or shorted, Fuel Injector 3 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 180

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 P020C 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 P020C 2018 GMC Sierra - Cylinder 3 Injection Timing - AutoCodes.com — P020C 2018 GMC Sierra Code - Cylinder 3 Injection Timing

What does this mean?

What are the Possible Causes of the DTC P020C 2018 GMC Sierra?

Faulty Fuel Injector 3
Fuel Injector 3 harness is open or shorted
Fuel Injector 3 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P020C 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 P020C 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 P020C 2018 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 P020C 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code P020C in a 2018 GMC Sierra related to Cylinder 3 Injection Timing?

The common symptoms include rough idling, reduced engine performance, misfires, and potential stalling of the vehicle.

2. What are the possible causes of OBDII code P020C in a 2018 GMC Sierra indicating an issue with Cylinder 3 Injection Timing?

Potential causes include faulty fuel injector in cylinder 3, wiring issues, poor electrical connection, or problems with the Engine Control Module (ECM).

3. How can I diagnose the OBDII code P020C in a 2018 GMC Sierra regarding Cylinder 3 Injection Timing?

Diagnosis involves using an OBDII scanner to retrieve the specific code, conducting a visual inspection of the cylinder 3 injector and its wiring, and performing tests to check the injector's functionality.

4. What steps should I take to repair OBDII code P020C in a 2018 GMC Sierra related to Cylinder 3 Injection Timing?

Repair may involve replacing the faulty fuel injector in cylinder 3, repairing or replacing damaged wiring, ensuring proper electrical connections, and resetting the ECM after the repair.

5. Can I drive my 2018 GMC Sierra with OBDII code P020C indicating Cylinder 3 Injection Timing issues?

It is not recommended to drive the vehicle with this code as it can lead to further engine damage or potential safety hazards. It is best to address the issue promptly.

6. How much does it typically cost to repair OBDII code P020C in a 2018 GMC Sierra related to Cylinder 3 Injection Timing?

The cost of repair can vary depending on the exact cause of the issue, but it may range from $200 to $600, including parts and labor.

7. Are there any preventative measures to avoid OBDII code P020C in a 2018 GMC Sierra related to Cylinder 3 Injection Timing?

Regular maintenance, such as using quality fuel and following the manufacturer's recommended service schedule, can help prevent issues with fuel injectors and related components.

8. Can a DIY enthusiast fix OBDII code P020C in a 2018 GMC Sierra indicating Cylinder 3 Injection Timing problems?

While some basic diagnostics can be performed by a DIY enthusiast, repairing issues related to fuel injectors and engine timing may require specialized tools and expertise best handled by a professional mechanic.

9. What are the risks of ignoring OBDII code P020C in a 2018 GMC Sierra associated with Cylinder 3 Injection Timing?

Ignoring this code can lead to poor engine performance, reduced fuel efficiency, potential damage to other engine components, and ultimately, more costly repairs in the future.

10. How long does it typically take to repair OBDII code P020C in a 2018 GMC Sierra related to Cylinder 3 Injection Timing?

The repair time can vary based on the exact cause of the issue and the availability of parts, but it may take anywhere from a few hours to a full day to address the problem effectively.