AutoCodes – GMC – P020E GMC

P020E GMC Code - Cylinder 5 Injection Timing

Quick Answer

The Engine Control Module (ECM) has the ability to learn injector timing performance. Common causes include Faulty Fuel Injector 5, Fuel Injector 5 harness is open or shorted, Fuel Injector 5 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: P020E GMC indicates Cylinder 5 Injection Timing.
Common causes: Common causes include Faulty Fuel Injector 5, Fuel Injector 5 harness is open or shorted, Fuel Injector 5 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 337

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 P020E GMC 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 P020E GMC - Cylinder 5 Injection Timing - AutoCodes.com — P020E GMC Code - Cylinder 5 Injection Timing

What does this mean?

What are the Possible Causes of the DTC P020E GMC?

Faulty Fuel Injector 5
Fuel Injector 5 harness is open or shorted
Fuel Injector 5 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P020E GMC?

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 P020E GMC 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 P020E GMC code?

Need more information on how to fix the P020E GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P020E GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

P020E 2014 GMC Sierra — Cylinder 5 Injection Timing
P020E 2015 GMC Sierra — Cylinder 5 Injection Timing
P020E 2016 GMC Sierra — Cylinder 5 Injection Timing
P020E 2017 GMC Sierra — Cylinder 5 Injection Timing
P020E 2018 GMC Sierra — Cylinder 5 Injection Timing

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 P020E GMC Code

1. What does the OBDII code P020E mean for a GMC vehicle?

P020E indicates a problem with the injection timing for Cylinder 5, often related to improper fuel delivery or timing issues.

2. What are the common symptoms of a P020E code in a GMC?

Symptoms may include rough idling, poor engine performance, reduced fuel efficiency, difficulty starting, or the check engine light turning on.

3. What causes the P020E code to appear?

Common causes include a faulty fuel injector, damaged wiring or connectors, a failing injector control module, or issues with the engine control module (ECM).

4. Can I drive my GMC with a P020E code?

Driving with a P020E code is not recommended, as it can lead to further engine damage, reduced performance, and increased emissions.

5. How is the P020E code diagnosed?

A mechanic will use a scan tool to confirm the code, inspect the injector wiring and connections, and test the fuel injector and control module for proper function.

6. How do I fix the P020E code on my GMC?

Repairs may involve replacing the faulty fuel injector, repairing or replacing damaged wiring, or reprogramming or replacing the injector control module or ECM.

7. Can a clogged fuel injector cause a P020E code?

Yes, a clogged or malfunctioning fuel injector can disrupt injection timing and trigger the P020E code.

8. What tools are needed to troubleshoot a P020E code?

Common tools include an OBDII scan tool, a multimeter for checking electrical connections, and possibly specialized tools for testing or replacing injectors.

9. How much does it cost to fix a P020E code on a GMC?

The repair cost can range from $200 to $1,000 or more, depending on whether the issue is a simple wiring repair or a complex injector or ECM replacement.

10. Can a software update fix the P020E code?

In some cases, a software update for the ECM may resolve timing issues if the code is caused by a programming error.