AutoCodes – GMC – P020C 2016 GMC Sierra

P020C 2016 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 2016 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 175

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 P020C 2016 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 2016 GMC Sierra - Cylinder 3 Injection Timing - AutoCodes.com — P020C 2016 GMC Sierra Code - Cylinder 3 Injection Timing

What does this mean?

What are the Possible Causes of the DTC P020C 2016 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 2016 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 2016 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 2016 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 P020C 2016 GMC Sierra Code

1. What does the OBDII code P020C mean on a 2016 GMC Sierra?

P020C indicates a problem with the injection timing for cylinder 3, suggesting an issue with the fuel injector circuit or related components.

2. What are the common symptoms of code P020C on a 2016 GMC Sierra?

Symptoms may include rough idling, reduced engine performance, poor fuel economy, misfires, and the check engine light being illuminated.

3. What causes the P020C code on a 2016 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.

4. Can driving with a P020C code damage my 2016 GMC Sierra?

Driving with this code can lead to further engine damage, reduced fuel efficiency, and potential long-term issues if the problem is not addressed promptly.

5. How do I diagnose code P020C on a 2016 GMC Sierra?

Diagnosis involves checking the injector wiring and connectors for damage, testing the fuel injector for proper operation, and using a scan tool to monitor injector performance.

6. Is a faulty fuel injector the only reason for the P020C code?

No, other reasons include wiring issues, poor connections, a defective PCM, or insufficient fuel supply to the injector.

7. How can I fix the P020C code on my 2016 GMC Sierra?

Repairs may involve replacing the faulty fuel injector, repairing damaged wiring, cleaning connectors, or updating/replacing the PCM if necessary.

8. How much does it cost to fix the P020C code on a 2016 GMC Sierra?

Repair costs vary but typically range from $150 to $500, depending on whether the issue is wiring-related or if the fuel injector needs replacement.

9. Can a clogged fuel injector cause the P020C code?

Yes, a clogged or restricted fuel injector can disrupt proper injection timing and trigger this code.

10. Do I need a professional mechanic to fix the P020C code on my 2016 GMC Sierra?

While some issues like checking wiring or connectors can be done at home, diagnosing and repairing fuel injectors or the PCM may require a professional mechanic.