AutoCodes – Buick – P1242 Buick

P1242 Buick Code - Fuel Injector 7 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 7, Fuel Injector 7 harness is open or shorted, Fuel Injector 7 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: P1242 Buick indicates Fuel Injector 7 Control Circuit Shorted.
Common causes: Common causes include Faulty Fuel Injector 7, Fuel Injector 7 harness is open or shorted, Fuel Injector 7 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 443

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1242 Buick 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 P1242 Buick - Fuel Injector 7 Control Circuit Shorted - AutoCodes.com — P1242 Buick Code - Fuel Injector 7 Control Circuit Shorted

What does this mean?

What are the Possible Causes of the DTC P1242 Buick?

Faulty Fuel Injector 7
Fuel Injector 7 harness is open or shorted
Fuel Injector 7 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P1242 Buick?

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 P1242 Buick 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 P1242 Buick code?

Need more information on how to fix the P1242 Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1242 Buick code diagnosed by a professional: Find a repair shop in your area

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 P1242 Buick Code

1. What are common symptoms of OBDII code P1242 in a Buick related to the fuel injector 7 control circuit being shorted?

- Common symptoms may include rough idle, engine misfires, decreased fuel efficiency, and potential stalling of the vehicle.

2. What are possible causes of the fuel injector 7 control circuit being shorted in a Buick triggering OBDII code P1242?

- Causes may include damaged wiring or connectors, a faulty fuel injector, a short circuit in the control circuit, or issues with the Engine Control Module (ECM).

3. How can I diagnose the cause of the shorted fuel injector 7 control circuit in my Buick triggering OBDII code P1242?

- Diagnosis typically involves conducting a visual inspection of the wiring and connectors, testing the fuel injector, checking for continuity in the control circuit, and using a diagnostic scan tool to analyze the ECM data.

4. Is it safe to drive my Buick with OBDII code P1242 related to a shorted fuel injector 7 control circuit?

- It is not recommended to drive the vehicle with this issue as it can lead to further damage to the engine and other components. It is best to address the problem promptly.

5. How can I repair a shorted fuel injector 7 control circuit in my Buick to clear OBDII code P1242?

- Repair may involve repairing or replacing damaged wiring or connectors, testing and possibly replacing the fuel injector, addressing any short circuits, and resetting the ECM to clear the code.

6. Can a DIY enthusiast fix the shorted fuel injector 7 control circuit issue triggering OBDII code P1242 in a Buick?

- Depending on the individual's skill level and access to tools, a DIY enthusiast may be able to address this issue by following proper diagnostic procedures and repair steps. However, professional help is recommended if unsure.

7. Will resetting the ECM clear OBDII code P1242 related to a shorted fuel injector 7 control circuit in my Buick?

- Resetting the ECM may temporarily clear the code, but it is essential to address the root cause of the issue (such as the shorted circuit) to prevent the code from reoccurring.

8. How much can I expect to pay for professional repairs related to OBDII code P1242 in a Buick due to a shorted fuel injector 7 control circuit?

- Repair costs can vary depending on the exact cause of the issue, labor rates, and parts needed. It is advisable to obtain quotes from reputable automotive shops for an accurate estimate.

9. Are there any preventive measures I can take to avoid encountering OBDII code P1242 in my Buick due to a shorted fuel injector 7 control circuit?

- Regular maintenance, such as checking and servicing the fuel injection system, inspecting wiring for damage, and addressing any electrical issues promptly, can help prevent such codes from appearing.