AutoCodes – Buick – P1262 Buick

P1262 Buick Code - Cylinder 2,3,5 and 8 High Voltage Circuit Fault

Quick Answer

The Fuel Injection Control Module (FICM) supplies high voltage to each fuel injector on the ignition voltage circuits. Common causes include Faulty Fuel Injection Control Module (FICM), Fuel Injection Control Module (FICM) harness is open or shorted, Fuel Injection Control Module (FICM) 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: P1262 Buick indicates Cylinder 2,3,5 and 8 High Voltage Circuit Fault.
Common causes: Common causes include Faulty Fuel Injection Control Module (FICM), Fuel Injection Control Module (FICM) harness is open or shorted, Fuel Injection Control Module (FICM) 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 278

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 Mar 21, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1262 Buick Description

The Fuel Injection Control Module (FICM) supplies high voltage to each fuel injector on the ignition voltage circuits. The FICM energizes each fuel injector by grounding the command circuit between the FICM and the fuel injector. The FICM monitors the status of the ignition voltage circuits and the fuel injector command circuits. When a fuel injector circuit condition is detected by the FICM, all of the fuel injectors on the affected ignition voltage circuit will be disabled. If a circuit condition is detected on a fuel injector circuit for cylinders 2, 3, 5, or 8, Diagnostic Trouble Code (DTC)s P0202, P0203, P0205, P0208 will set, along with DTC P1262.

OBDII Code P1262 Buick - Cylinder 2,3,5 and 8 High Voltage Circuit Fault - AutoCodes.com — P1262 Buick Code - Cylinder 2,3,5 and 8 High Voltage Circuit Fault

What does this mean?

What are the Possible Causes of the DTC P1262 Buick?

Faulty Fuel Injection Control Module (FICM)
Fuel Injection Control Module (FICM) harness is open or shorted
Fuel Injection Control Module (FICM) circuit poor electrical connection

How to Fix the DTC P1262 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 P1262 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.

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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 P1262 Buick Code

1. What are common symptoms of OBDII code P1262 in a Buick related to the Cylinder 2, 3, 5, and 8 high voltage circuit fault?

- Common symptoms include rough idling, misfires, loss of power, and illuminated Check Engine Light.

2. What are the possible causes of OBDII code P1262 in a Buick indicating a high voltage circuit fault in cylinders 2, 3, 5, and 8?

- Potential causes can include faulty ignition coils, damaged spark plugs, wiring issues, or a problem with the engine control module (ECM).

3. How can I diagnose the high voltage circuit fault triggering OBDII code P1262 in my Buick on cylinders 2, 3, 5, and 8?

- Use a scan tool to check for specific misfire codes, conduct a visual inspection of spark plugs and ignition coils, and perform a thorough check of the wiring harness.

4. Can I continue to drive my Buick with OBDII code P1262 related to the high voltage circuit fault in cylinders 2, 3, 5, and 8?

- It is not recommended to drive extensively with this code as it can lead to further engine damage. It's best to address the issue promptly.

5. What are some DIY repair tips for fixing OBDII code P1262 in a Buick due to a high voltage circuit fault in cylinders 2, 3, 5, and 8?

- Start by inspecting and potentially replacing faulty spark plugs or ignition coils, checking and repairing any damaged wiring, and clearing the code with a scan tool after repairs.

6. Is it necessary to visit a mechanic for OBDII code P1262 related to a high voltage circuit fault on cylinders 2, 3, 5, and 8 in my Buick?

- While some DIY repairs are possible, complex issues with the ECM or deeper electrical faults may require professional diagnosis and repair.

7. How much can I expect to pay for repairing OBDII code P1262 on my Buick caused by a high voltage circuit fault in cylinders 2, 3, 5, and 8?

- Costs can vary based on the specific issue, but expect to pay anywhere from $100 to $500 for parts and labor, depending on the extent of the repairs needed.

8. What long-term effects can OBDII code P1262 have on a Buick if left unresolved?

- Ignoring this code can lead to increased fuel consumption, engine damage, and potential catalytic converter failure over time, resulting in more expensive repairs.

9. Are there any preventive measures to avoid OBDII code P1262 related to high voltage circuit faults in a Buick's cylinders 2, 3, 5, and 8?

- Regular maintenance, such as timely spark plug replacements and inspection of ignition components, can help prevent issues that trigger this fault code.

10. Can weather conditions or driving habits contribute to the occurrence of OBDII code P1262 in a Buick associated with the high voltage circuit fault in cylinders 2, 3, 5, and 8?

- Extreme weather, rough driving conditions, and prolonged idling can potentially exacerbate existing issues leading to this fault code, making regular maintenance even more crucial.