AutoCodes – GMC – P020A 2017 GMC Sierra

P020A 2017 GMC Sierra Code - Cylinder 1 Injection Timing

Quick Answer

The Engine Control Module (ECM) has the ability to learn injector timing performance. Common causes include Faulty Fuel Injector 1, Fuel Injector 1 harness is open or shorted, Fuel Injector 1 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: P020A 2017 GMC Sierra indicates Cylinder 1 Injection Timing.
Common causes: Common causes include Faulty Fuel Injector 1, Fuel Injector 1 harness is open or shorted, Fuel Injector 1 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 179

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 P020A 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 P020A 2017 GMC Sierra - Cylinder 1 Injection Timing - AutoCodes.com — P020A 2017 GMC Sierra Code - Cylinder 1 Injection Timing

What does this mean?

What are the Possible Causes of the DTC P020A 2017 GMC Sierra?

Faulty Fuel Injector 1
Fuel Injector 1 harness is open or shorted
Fuel Injector 1 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P020A 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 P020A 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 P020A 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 P020A 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code P020A (Cylinder 1 Injection Timing) in a 2017 GMC Sierra?

The common symptoms include rough idling, reduced engine performance, misfires in cylinder 1, and potential stalling of the vehicle.

2. What are the possible causes of OBDII code P020A in a 2017 GMC Sierra?

Possible causes of this code may include issues with the fuel injector in cylinder 1, wiring or connector problems related to the injector, or a faulty Engine Control Module (ECM).

3. How can I diagnose the OBDII code P020A in my 2017 GMC Sierra?

Diagnosing this code involves using a scan tool to read the specific trouble code, checking the wiring and connectors related to the fuel injector in cylinder 1, and testing the injector itself for proper function.

4. Can a DIY enthusiast repair OBDII code P020A in a 2017 GMC Sierra?

While some DIY enthusiasts may be able to address this issue by replacing the faulty fuel injector in cylinder 1, it is recommended to consult a professional mechanic for an accurate diagnosis and repair.

5. Is it safe to continue driving my 2017 GMC Sierra with OBDII code P020A (Cylinder 1 Injection Timing)?

Continuing to drive with this code may lead to further engine damage or performance issues. It is advisable to have the issue diagnosed and repaired as soon as possible to prevent potential complications.

6. How much does it typically cost to repair OBDII code P020A in a 2017 GMC Sierra?

The cost of repairing this code can vary depending on the exact cause of the issue. It may involve replacing the fuel injector, addressing wiring problems, or ECM repairs, so the cost can range from a few hundred to over a thousand dollars.

7. Are there any preventative maintenance tips to avoid OBDII code P020A in a 2017 GMC Sierra?

Regularly servicing the fuel system, using high-quality fuel, and ensuring proper engine maintenance can help prevent issues that may lead to OBDII code P020A in your GMC Sierra.

8. Will resetting the OBDII code P020A in my 2017 GMC Sierra make it go away permanently?

Simply resetting the code without addressing the underlying issue will not make it go away permanently. It is crucial to diagnose and fix the root cause of the problem to prevent the code from reoccurring.

9. Can weather or driving conditions affect the occurrence of OBDII code P020A in a 2017 GMC Sierra?

Extreme weather conditions or driving in harsh environments may exacerbate issues related to the fuel system, potentially leading to the triggering of OBDII code P020A in your GMC Sierra.

10. How long does it typically take to repair OBDII code P020A in a 2017 GMC Sierra?

The repair time for this code can vary based on the exact cause of the issue and the complexity of the repair needed. It may take a few hours to a full day to diagnose and fix the problem properly.