AutoCodes – GMC – P1247 GMC

P1247 GMC Code - Fuel Injector 8 Control Circuit Shorted

Quick Answer

The Engine Control Module (ECM) supplies voltage to each fuel injector on the injector positive voltage control circuits. 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: P1247 GMC indicates Fuel Injector 8 Control Circuit Shorted.
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 1,550

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 Nov 10, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1247 GMC Description

The Engine Control Module (ECM) supplies voltage to each fuel injector on the injector positive voltage control circuits. The ECM energizes each fuel injector by grounding the control circuit of that fuel injector. The ECM monitors the status of the injector positive voltage control circuits and the fuel injector control circuits. When a fuel injector circuit condition is detected by the ECM, the affected fuel injectors will be disabled and may disable the affected group of fuel injectors. The Diagnostic Trouble Code (DTC) will set when the ECM injector output driver detects an incorrect current on a fuel injector circuit.

OBDII Code P1247 GMC - Fuel Injector 8 Control Circuit Shorted - AutoCodes.com — P1247 GMC Code - Fuel Injector 8 Control Circuit Shorted

What does this mean?

What are the Possible Causes of the DTC P1247 GMC?

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 P1247 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 P1247 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 P1247 GMC 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 P1247 GMC Code

1. What are the common symptoms of OBDII code P1247 GMC (Fuel Injector 8 Control Circuit Shorted)?

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

2. What can cause the OBDII code P1247 GMC to trigger?

- The code may be triggered by a short circuit in the control circuit of fuel injector 8, faulty wiring, or a malfunctioning fuel injector.

3. How serious is the OBDII code P1247 GMC (Fuel Injector 8 Control Circuit Shorted)?

- While the vehicle may still be operable with this code, driving with a shorted fuel injector control circuit can lead to engine performance issues and potential damage if left unresolved.

4. What are some DIY repair tips for fixing OBDII code P1247 GMC?

- DIY repair tips may include checking the wiring harness for damage, testing the fuel injector and related components for proper function, and clearing the code with an OBDII scanner.

5. Is it safe to continue driving with the OBDII code P1247 GMC active?

- It is not recommended to drive the vehicle with this code active, as it can lead to poor engine performance and potential long-term damage to the fuel injector and engine components.

6. Can a shorted fuel injector control circuit cause other issues in the vehicle?

- Yes, a shorted fuel injector control circuit can cause issues such as engine misfires, rough idling, decreased power, and potentially affect the overall drivability of the vehicle.

7. How much does it typically cost to repair OBDII code P1247 GMC?

- The cost of repairing this code can vary depending on the underlying cause, but it may involve replacing the fuel injector, repairing wiring, or addressing other related issues. Costs can range from a few hundred to over a thousand dollars.

8. Can I prevent the OBDII code P1247 GMC from recurring in the future?

- Regular maintenance, such as checking and replacing fuel injectors as needed, inspecting wiring harnesses for damage, and addressing any engine performance issues promptly, can help prevent the recurrence of this code.

9. How long does it take to repair OBDII code P1247 GMC?

- The repair time for this code can vary based on the specific cause and the mechanic's expertise, but it may take a few hours to a day to diagnose and fix the issue.

10. Will resetting the OBDII code P1247 GMC make it go away permanently?

- Resetting the code may temporarily clear the check engine light, but if the underlying issue causing the code is not addressed, it is likely to reappear. It's important to diagnose and repair the root cause of the problem to prevent recurrence.