AutoCodes – GMC – P2147 2017 GMC Sierra

P2147 2017 GMC Sierra Code - Cylinder 1 Injector High Control Circuit Low Voltage

Quick Answer

The Engine Control Module (ECM) supplies voltage to each fuel injector on the high control circuits. Common causes include Faulty Fuel Injector 1, Fuel Injector 1 harness is open or shorted, Fuel Injector 1 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: P2147 2017 GMC Sierra indicates Cylinder 1 Injector High Control Circuit Low Voltage.
Common causes: Common causes include Faulty Fuel Injector 1, Fuel Injector 1 harness is open or shorted, Fuel Injector 1 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 184

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 08, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2147 2017 GMC Sierra Description

The Engine Control Module (ECM) supplies voltage to each fuel injector on the high control circuits. The ECM energizes each fuel injector by grounding the low control circuit of the fuel injector. The ECM monitors the status of the fuel injector circuits. When a fuel injector circuit condition is detected by the ECM, the affected fuel injector(s) is disabled. The Diagnostic Trouble Code (DTC) will be set when the ECM detects the fuel injector high voltage supply circuit is shorted to ground for greater than 2 s.

OBDII Code P2147 2017 GMC Sierra - Cylinder 1 Injector High Control Circuit Low Voltage - AutoCodes.com — P2147 2017 GMC Sierra Code - Cylinder 1 Injector High Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2147 2017 GMC Sierra?

Faulty Fuel Injector 1
Fuel Injector 1 harness is open or shorted
Fuel Injector 1 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2147 2017 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 P2147 2017 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 P2147 2017 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 P2147 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code P2147 in a 2017 GMC Sierra?

- Common symptoms include rough idling, engine misfires, poor acceleration, and potentially an illuminated Check Engine light.

2. What does the OBDII code P2147 on a 2017 GMC Sierra indicate?

- OBDII code P2147 indicates a fault in the Cylinder 1 Injector High Control Circuit, specifically low voltage.

3. What are the possible causes of OBDII code P2147 in a 2017 GMC Sierra?

- Possible causes include a faulty fuel injector, wiring issues in the injector circuit, a defective Engine Control Module (ECM), or poor electrical connections.

4. How can I diagnose the cause of OBDII code P2147 in my 2017 GMC Sierra?

- Diagnosis typically involves inspecting the cylinder 1 injector, testing the wiring and connections in the control circuit, and using a scan tool to verify the fault.

5. Can driving with OBDII code P2147 in a 2017 GMC Sierra cause further damage?

- Continuing to drive with this code may lead to poor engine performance, decreased fuel efficiency, and potential damage to the catalytic converter over time.

6. How can I repair OBDII code P2147 in my 2017 GMC Sierra?

- Repair options include replacing the faulty fuel injector, repairing any damaged wiring or connections, or reprogramming the ECM if needed.

7. Is it safe to reset the Check Engine light after fixing OBDII code P2147 in a 2017 GMC Sierra?

- Yes, once the issue causing the fault code has been resolved, it is safe to reset the Check Engine light using an OBDII scanner.

8. How much does it typically cost to repair OBDII code P2147 in a 2017 GMC Sierra?

- Repair costs can vary depending on the exact cause of the issue, but expect to pay for parts and labor, with potential costs ranging from $200 to $500 or more.

9. Can a DIY enthusiast fix OBDII code P2147 in a 2017 GMC Sierra?

- Depending on your mechanical skills and access to tools, some DIY enthusiasts may be able to diagnose and repair this issue themselves, especially if it involves simple tasks like checking connections.

10. How long can I safely drive with OBDII code P2147 in my 2017 GMC Sierra before getting it repaired?

- It is recommended to address the issue promptly to prevent potential engine damage and ensure optimal performance. Driving with the fault code for an extended period is not advisable.