AutoCodes – Cadillac – P1247 Cadillac

P1247 Cadillac 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 Cadillac 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 467

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

What does this mean?

What are the Possible Causes of the DTC P1247 Cadillac?

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 Cadillac?

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 Cadillac 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.

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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 Cadillac Code

1. What does the OBDII code P1247 mean on a Cadillac?

P1247 indicates a short circuit in the control circuit for Fuel Injector 8, meaning the engine control module (ECM) detects a fault in the electrical connection to that injector.

2. What are the common symptoms of code P1247 on a Cadillac?

Symptoms may include rough idling, misfires, reduced engine performance, poor fuel economy, and the check engine light being illuminated.

3. What causes code P1247 on a Cadillac?

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

4. How is code P1247 diagnosed on a Cadillac?

A technician will inspect the wiring and connectors for Injector 8, test the injector's resistance, check for continuity or shorts in the circuit, and use a scan tool to monitor injector operation.

5. Can I drive my Cadillac with code P1247?

Driving with code P1247 is not recommended, as it can cause engine misfires and potential damage to other components like the catalytic converter.

6. How much does it cost to fix code P1247 on a Cadillac?

Repair costs vary but typically range from $150 to $400, depending on whether the issue is with the injector itself, the wiring, or other related components.

7. Can I fix code P1247 on my Cadillac myself?

If you're experienced with automotive electrical systems, you can inspect and repair wiring or replace the injector, but a professional diagnosis is recommended to ensure the correct fix.

8. Does a faulty ECM cause code P1247?

A faulty ECM is a less common cause of P1247, but if wiring and the injector are in good condition, the ECM may need to be tested or replaced.

9. How do I prevent code P1247 from occurring on a Cadillac?

Regular maintenance, such as inspecting and cleaning electrical connections and ensuring injectors are in good condition, can help prevent code P1247.

10. Will clearing the code fix P1247 on a Cadillac?

Clearing the code will turn off the check engine light temporarily, but the issue will likely return unless the underlying problem is resolved.