AutoCodes – GMC – P020D 2014 GMC Sierra

P020D 2014 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 2014 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 245

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 2014 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 2014 GMC Sierra - Cylinder 4 Injection Timing - AutoCodes.com — P020D 2014 GMC Sierra Code - Cylinder 4 Injection Timing

What does this mean?

What are the Possible Causes of the DTC P020D 2014 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 2014 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 2014 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 2014 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 2014 GMC Sierra Code

What does the OBDII code P020D mean for a 2014 GMC Sierra?

P020D indicates an issue with the cylinder 4 injector circuit timing, typically signaling a problem with the injector performance or its electrical control.

What are the common symptoms of code P020D in a 2014 GMC Sierra?

Symptoms may include rough idling, poor engine performance, misfires, decreased fuel efficiency, and the illumination of the check engine light.

What causes the P020D code to appear on a 2014 GMC Sierra?

Possible causes include a faulty fuel injector, damaged wiring or connectors in the injector circuit, a malfunctioning PCM (Powertrain Control Module), or low fuel pressure.

Can a bad fuel injector cause the P020D code?

Yes, a malfunctioning fuel injector that is stuck open, clogged, or unable to properly regulate fuel flow can trigger this code.

How can I diagnose the P020D code on a 2014 GMC Sierra?

Start by visually inspecting the wiring and connectors for damage or corrosion, test the injector for proper function, and use a multimeter to check for electrical continuity in the circuit.

Is it safe to drive with the P020D code active on a 2014 GMC Sierra?

Driving with this code is not recommended as it can lead to engine misfires, reduced performance, and potential damage to other engine components.

What repairs are typically needed to fix code P020D on a 2014 GMC Sierra?

Repairs may include replacing the fuel injector for cylinder 4, repairing or replacing damaged wiring, cleaning the connectors, or in rare cases, replacing the PCM.

Can low fuel pressure cause the P020D code?

Yes, insufficient fuel pressure can affect injector timing and performance, potentially triggering this code.

How much does it cost to repair the P020D code on a 2014 GMC Sierra?

Repair costs vary but may range from $200 to $500 for injector replacement, while wiring or PCM repairs could cost more depending on the extent of the damage.

How can I prevent the P020D code from recurring on my 2014 GMC Sierra?

Regular maintenance, including fuel system cleaning, inspecting wiring, and ensuring proper fuel pressure, can help prevent injector-related issues and this code.