AutoCodes – GMC – P219A 2016 GMC Sierra

P219A 2016 GMC Sierra Code - Fuel Trim Cylinder Balance Bank 1

Quick Answer

The Fuel Trim Cylinder Balance diagnostic detects a rich or lean cylinder to cylinder air/fuel ratio imbalance in each bank. Common causes include Leaking or contaminated fuel injectors, Low fuel pressure or running out of fuel, Exhaust or intake air system leaks. 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: P219A 2016 GMC Sierra indicates Fuel Trim Cylinder Balance Bank 1.
Common causes: Common causes include Leaking or contaminated fuel injectors, Low fuel pressure or running out of fuel, Exhaust or intake air system leaks.
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 386

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 Sep 20, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P219A 2016 GMC Sierra Description

The Fuel Trim Cylinder Balance diagnostic detects a rich or lean cylinder to cylinder air/fuel ratio imbalance in each bank. The diagnostic monitors the pre-catalyst heated oxygen sensor (HO2S) signal's frequency and amplitude characteristics by calculating an accumulated voltage over a predetermined sample period. An imbalance is indicated when multiple samples of the accumulated voltage are consistently higher than the desired value.
The Diagnostic Trouble Code (DTC) will be set when multiple samples of the pre-catalyst HO2S accumulated voltage are consistently greater than the desired value.

OBDII Code P219A 2016 GMC Sierra - Fuel Trim Cylinder Balance Bank 1 - AutoCodes.com — P219A 2016 GMC Sierra Code - Fuel Trim Cylinder Balance Bank 1

What does this mean?

What are the Possible Causes of the DTC P219A 2016 GMC Sierra?

Leaking or contaminated fuel injectors
Low fuel pressure or running out of fuel
Exhaust or intake air system leaks
Faulty Exhaust Gas Recirculation (EGR) system
Positive Crankcase Ventilation (PCV) system is leaking, or the valve is stuck open
Ignition system
Incorrectly seated engine oil dipstick, tube, or oil fill cap

How to Fix the DTC P219A 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 does this mean?

Code Tech Notes

The fuel trim cylinder balance diagnostic is sensitive to the heated oxygen sensor (HO2S) design. A non-factory sensor or an incorrect part number may set a false DTC. Monitoring the misfire current counters, or misfire graph may help to isolate the cylinder that is causing the condition.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P219A 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 P219A 2016 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 P219A 2016 GMC Sierra Code

1. What does OBDII code P219A on a 2016 GMC Sierra indicate?

- OBDII code P219A indicates a Fuel Trim Cylinder Balance Bank 1 issue on a 2016 GMC Sierra.

2. What are the common symptoms of OBDII code P219A in a GMC Sierra?

- Common symptoms of P219A may include rough idling, decreased fuel efficiency, engine misfires, and potentially a check engine light.

3. What are the possible causes of OBDII code P219A on a 2016 GMC Sierra?

- Possible causes of P219A include a faulty oxygen sensor, fuel injector issues, vacuum leaks, or problems with the fuel system.

4. How can I diagnose the cause of OBDII code P219A on my GMC Sierra?

- To diagnose P219A, you may need to perform a thorough inspection of the oxygen sensors, fuel injectors, vacuum lines, and fuel system components using a diagnostic scanner.

5. Can I continue driving my 2016 GMC Sierra with OBDII code P219A?

- It is not recommended to drive your vehicle with an unresolved P219A code, as it can lead to engine performance issues and potentially cause further damage.

6. How can I repair OBDII code P219A on my GMC Sierra?

- Repairing P219A may involve replacing a faulty oxygen sensor, addressing fuel injector issues, fixing vacuum leaks, or repairing the fuel system components as needed.

7. Is it possible to reset the OBDII code P219A on a 2016 GMC Sierra without repairing the issue?

- While you can clear the code temporarily, it is crucial to address the root cause of P219A to prevent the issue from recurring and potentially causing more significant problems.

8. How much does it cost to repair OBDII code P219A on a 2016 GMC Sierra?

- The cost of repairing P219A can vary depending on the extent of the issue, parts needed for replacement, and labor costs. It is advisable to consult a mechanic for an accurate estimate.

9. Can a DIY enthusiast fix OBDII code P219A on a 2016 GMC Sierra?

- Depending on your skill level and access to tools, some DIY enthusiasts may be able to address simpler causes of P219A, such as replacing an oxygen sensor. However, more complex issues may require professional assistance.

10. How often does OBDII code P219A occur in a 2016 GMC Sierra?

- The occurrence of P219A in a 2016 GMC Sierra can vary depending on factors such as vehicle maintenance, driving conditions, and overall health of the engine components. Regular maintenance and prompt issue resolution can help minimize the chances of encountering this code.