AutoCodes – GMC – P020D 2017 GMC Sierra

P020D 2017 GMC Sierra Code - Cylinder 4 Injection Timing

Quick Answer

The Engine Control Module (ECM) has the ability to learn injector timing performance. Common causes include Faulty Fuel Injector 4, Fuel Injector 4 harness is open or shorted, Fuel Injector 4 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: P020D 2017 GMC Sierra indicates Cylinder 4 Injection Timing.
Common causes: Common causes include Faulty Fuel Injector 4, Fuel Injector 4 harness is open or shorted, Fuel Injector 4 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 202

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 P020D 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 P020D 2017 GMC Sierra - Cylinder 4 Injection Timing - AutoCodes.com — P020D 2017 GMC Sierra Code - Cylinder 4 Injection Timing

What does this mean?

What are the Possible Causes of the DTC P020D 2017 GMC Sierra?

Faulty Fuel Injector 4
Fuel Injector 4 harness is open or shorted
Fuel Injector 4 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P020D 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 P020D 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 P020D 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 P020D 2017 GMC Sierra Code

1. What does the OBDII code P020D mean on a 2017 GMC Sierra?

P020D indicates an issue with the Cylinder 4 Injection Timing, typically caused by an electrical or mechanical problem affecting the fuel injector's performance.

2. What are the common symptoms of code P020D in a 2017 GMC Sierra?

Symptoms may include rough idling, misfires, poor fuel economy, reduced engine performance, or the Check Engine Light turning on.

3. What causes the P020D code to appear?

Common causes include a faulty fuel injector, damaged wiring or connectors, a malfunctioning powertrain control module (PCM), or low fuel pressure.

4. Can I drive my 2017 GMC Sierra with a P020D code?

Driving with this code is not recommended, as continued operation could lead to further engine damage, reduced performance, or unsafe driving conditions.

5. How do I diagnose the P020D code in a 2017 GMC Sierra?

Diagnosis involves inspecting the Cylinder 4 fuel injector, checking the wiring and connectors for damage, testing the injector's resistance, and verifying proper PCM operation.

6. How is the P020D code fixed on a 2017 GMC Sierra?

Repairs may include replacing the faulty fuel injector, repairing or replacing damaged wiring, cleaning clogged injectors, or reprogramming or replacing the PCM, if necessary.

7. What tools are needed to troubleshoot the P020D code?

You may need an OBDII scanner, a multimeter to test electrical circuits, and fuel injector testing tools for proper diagnosis.

8. Can a dirty fuel injector cause the P020D code?

Yes, a clogged or dirty fuel injector can disrupt the timing and performance of Cylinder 4, triggering the P020D code.

9. How much does it cost to fix the P020D code on a 2017 GMC Sierra?

Repair costs vary depending on the issue but typically range from $150 to $500, including parts and labor, with higher costs if the PCM requires replacement.

10. Can a software update fix the P020D code on a 2017 GMC Sierra?

In some cases, a PCM software update may resolve timing issues, but this depends on the specific root cause of the code.