AutoCodes – GMC – P020B 2014 GMC Sierra

P020B 2014 GMC Sierra Code - Cylinder 2 Injection Timing

Quick Answer

The Engine Control Module (ECM) has the ability to learn injector timing performance. Common causes include Faulty Fuel Injector 2, Fuel Injector 2 harness is open or shorted, Fuel Injector 2 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
P020B 2014 GMC Sierra indicates Cylinder 2 Injection Timing.
Common causes
Common causes include Faulty Fuel Injector 2, Fuel Injector 2 harness is open or shorted, Fuel Injector 2 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 170
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Mar 22, 2024
πŸ’¬ Need more help? Ask Coddy for instant answers β€” it's free!

Code P020B 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 P020B 2014 GMC Sierra - Cylinder 2 Injection Timing - AutoCodes.com
P020B 2014 GMC Sierra Code - Cylinder 2 Injection Timing

What are the Possible Causes of the DTC P020B 2014 GMC Sierra?

  • Faulty Fuel Injector 2
  • Fuel Injector 2 harness is open or shorted
  • Fuel Injector 2 circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

How to Fix the DTC P020B 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 P020B 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 P020B 2014 GMC Sierra code?

Need more information on how to fix the P020B 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P020B 2014 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 P020B 2014 GMC Sierra Code

What does OBDII code P020B mean on a 2014 GMC Sierra?

P020B indicates an issue with the injection timing for cylinder 2, typically related to the fuel injector or its control circuit.

What are common symptoms of code P020B in a 2014 GMC Sierra?

Symptoms may include rough idle, reduced engine performance, misfires, poor fuel economy, or the check engine light turning on.

What causes the P020B code to appear?

Common causes include a faulty fuel injector, damaged wiring or connectors in the injector circuit, a malfunctioning engine control module (ECM), or low fuel pressure.

How can I diagnose the P020B code on my 2014 GMC Sierra?

Start by inspecting the wiring and connectors for cylinder 2's injector, testing the injector for proper operation, and using a scan tool to monitor fuel injection timing.

Can a dirty fuel injector cause the P020B code?

Yes, a clogged or dirty fuel injector can disrupt proper fuel delivery and timing, triggering this code.

Is it safe to drive with the P020B code active?

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

How do I fix the P020B code on a 2014 GMC Sierra?

Repairs may include replacing the fuel injector, repairing damaged wiring or connectors, or reprogramming or replacing the ECM if necessary.

Can low fuel pressure cause the P020B code?

Yes, insufficient fuel pressure can affect injection timing and trigger this code.

How much does it cost to repair the P020B code?

Costs vary depending on the exact cause but may range from $100 for wiring repairs to over $500 for fuel injector or ECM replacement.

Will clearing the code P020B fix the problem permanently?

No, clearing the code will only reset the check engine light. You must address the underlying issue to prevent the code from returning.

Discuss the causes and fixes for P020B 2014 GMC Sierra OBDII Code

Code P020B 2014 GMC Sierra comments

No comments found for this page.

AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play