AutoCodes – Buick – P0268 Buick

P0268 Buick Code - Cylinder 3 Injector Control Circuit High Voltage

Quick Answer

The Engine Control Module (ECM) supplies voltage to each Fuel Injector on the high control circuits. Common causes include Dirty Fuel Injector 3, Faulty Fuel Injector 3, Plugged Fuel Injector 3. 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: P0268 Buick indicates Cylinder 3 Injector Control Circuit High Voltage.
Common causes: Common causes include Dirty Fuel Injector 3, Faulty Fuel Injector 3, Plugged Fuel Injector 3.
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 370

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 23, 2024

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0268 Buick 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 control circuit is shorted to voltage for greater than 2 s.

OBDII Code P0268 Buick - Cylinder 3 Injector Control Circuit High Voltage - AutoCodes.com — P0268 Buick Code - Cylinder 3 Injector Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0268 Buick?

Dirty Fuel Injector 3
Faulty Fuel Injector 3
Plugged Fuel Injector 3
Fuel Injector #3 harness is open or shorted
Fuel Injector #3 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0268 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 does this mean?

Code Tech Notes

A clogged or partially clogged fuel injector can cause this code. Start by performing an injector flush before replacing the injector.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0268 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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Need Help with the 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 P0268 Buick Code

What does the OBDII code P0268 mean for a Buick?

It indicates that the cylinder 3 injector control circuit is experiencing high voltage, which typically points to an electrical issue in the injector system.

What are common symptoms of code P0268 on a Buick?

Symptoms include rough engine idle, misfires, reduced engine performance, increased fuel consumption, and possible illumination of the check engine light.

What causes the P0268 code on a Buick?

Common causes include a shorted fuel injector, damaged wiring or connectors, a faulty PCM (Powertrain Control Module), or excessive resistance in the injector circuit.

Can I drive my Buick with the P0268 code?

Driving with this code is not recommended as it can lead to engine damage, poor fuel efficiency, and unsafe driving conditions due to misfires.

How is the P0268 code diagnosed?

A mechanic will inspect the wiring and connectors for damage, test the fuel injector for proper operation, and use a multimeter to measure voltage levels in the injector circuit.

How do you fix the P0268 code on a Buick?

Repairs may include replacing the cylinder 3 fuel injector, repairing or replacing damaged wiring, cleaning corroded connectors, or reprogramming the PCM if necessary.

What tools are needed to fix code P0268?

Common tools include a multimeter, OBDII scanner, wiring diagrams, and basic hand tools like screwdrivers and wrenches.

Can a faulty PCM cause the P0268 code?

Yes, a malfunctioning PCM can fail to regulate the injector control circuit properly, leading to high voltage issues.

How much does it cost to fix a P0268 code on a Buick?

Costs vary, but replacing a fuel injector typically ranges from $200 to $500, while wiring repairs could cost $100 to $300. PCM replacement can be more expensive, averaging $500 to $1,200.

How can I prevent code P0268 from recurring?

Regular maintenance, inspecting wiring for damage, using high-quality fuel, and addressing injector issues promptly can help prevent future occurrences.