AutoCodes – Chevrolet – P021B 2014 Chevrolet Silverado

P021B 2014 Chevrolet Silverado Code - Cylinder 8 Injection Timing

Quick Answer

The Engine Control Module (ECM) has the ability to learn injector timing performance. Common causes include Faulty Fuel Injector 8, Fuel Injector 8 harness is open or shorted, Fuel Injector 8 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: P021B 2014 Chevrolet Silverado indicates Cylinder 8 Injection Timing.
Common causes: Common causes include Faulty Fuel Injector 8, Fuel Injector 8 harness is open or shorted, Fuel Injector 8 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 213

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 P021B 2014 Chevrolet Silverado 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 P021B 2014 Chevrolet Silverado - Cylinder 8 Injection Timing - AutoCodes.com — P021B 2014 Chevrolet Silverado Code - Cylinder 8 Injection Timing

What does this mean?

What are the Possible Causes of the DTC P021B 2014 Chevrolet Silverado?

Faulty Fuel Injector 8
Fuel Injector 8 harness is open or shorted
Fuel Injector 8 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P021B 2014 Chevrolet Silverado?

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 P021B 2014 Chevrolet Silverado 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 P021B 2014 Chevrolet Silverado code?

Need more information on how to fix the P021B 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals

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 P021B 2014 Chevrolet Silverado Code

1. What does the OBDII code P021B mean for a 2014 Chevrolet Silverado?

P021B indicates an issue with the injection timing for cylinder 8, meaning the fuel injection process is not occurring at the correct time.

2. What are common symptoms of the P021B code in a 2014 Chevrolet Silverado?

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

3. What causes the P021B code to appear?

Common causes include a faulty fuel injector in cylinder 8, a malfunctioning injector control module, wiring issues, or a problem with the engine control module (ECM).

4. Can I drive my 2014 Chevrolet Silverado with the P021B code active?

Driving with this code is not recommended, as it can lead to further engine damage or reduced fuel efficiency if not addressed promptly.

5. How is the P021B code diagnosed?

A technician will use a scan tool to confirm the code, inspect the fuel injector for cylinder 8, check wiring and connectors, and test the injector control module.

6. How do I fix the P021B code on my Silverado?

Repairs may include replacing the faulty cylinder 8 fuel injector, repairing or replacing damaged wiring, or reprogramming or replacing the injector control module.

7. Can a clogged fuel injector cause the P021B code?

Yes, a clogged or dirty fuel injector can disrupt injection timing and lead to the P021B code.

8. How much does it cost to repair the P021B code on a 2014 Silverado?

Costs can vary but typically range from $150 to $500, depending on whether the injector, wiring, or control module needs repair or replacement.

9. Can low fuel pressure trigger the P021B code?

While low fuel pressure can affect overall engine performance, this code specifically relates to the timing of cylinder 8 injection and is more likely caused by injector-specific issues.

10. Will resetting the Check Engine Light fix the P021B code?

Resetting the light may clear the code temporarily, but the underlying issue must be addressed to prevent the code from returning.