AutoCodes – Mercury – P0268 Mercury

P0268 Mercury Code - Cylinder 3 Injector Circuit High

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 Mercury indicates Cylinder 3 Injector Circuit High.
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 298

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 Jun 02, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0268 Mercury 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 Mercury - Cylinder 3 Injector Circuit High - AutoCodes.com — P0268 Mercury Code - Cylinder 3 Injector Circuit High

What does this mean?

What are the Possible Causes of the DTC P0268 Mercury?

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

How to Fix the DTC P0268 Mercury?

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

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 Mercury 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 more information on how to fix the P0268 Mercury code? Get Access to Factory Service Manuals

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 Mercury Code

1. What does the OBDII code P0268 mean for a Mercury vehicle?

P0268 indicates that the fuel injector circuit for cylinder 3 has a high voltage condition, which may disrupt engine performance.

2. What are the common symptoms of the P0268 code in a Mercury?

Symptoms include rough idling, reduced engine power, poor fuel economy, difficulty starting the engine, and an illuminated check engine light.

3. What causes the P0268 code on a Mercury vehicle?

Common causes include a short circuit in the injector wiring, a faulty fuel injector, a defective PCM, or corrosion or damage to the electrical connectors.

4. Can driving with the P0268 code damage my Mercury's engine?

Yes, prolonged driving with this code can lead to engine misfires, potential damage to the catalytic converter, and overall reduced engine efficiency.

5. How can I diagnose the P0268 code on a Mercury?

Start by inspecting the cylinder 3 injector, wiring, and connectors for damage or corrosion. Use a multimeter to test voltage levels and check for shorts or continuity issues.

6. How do you repair the P0268 code on a Mercury?

Repairs may involve replacing the faulty injector, repairing or replacing damaged wiring, cleaning corroded connectors, or reprogramming or replacing the PCM if necessary.

7. Is the P0268 code specific to Mercury vehicles?

No, this code can occur in various vehicle makes and models, but the specific diagnosis and repair steps may vary depending on the vehicle.

8. How much does it cost to fix the P0268 code on a Mercury?

Repair costs vary based on the issue but can range from $100 for simple wiring repairs to several hundred dollars for injector or PCM replacement.

9. Can a dirty fuel injector cause the P0268 code on a Mercury?

A dirty or clogged injector typically causes poor fuel flow but is unlikely to cause a high voltage condition. Electrical or wiring issues are the more likely culprit.

10. What tools are needed to troubleshoot the P0268 code on a Mercury?

Youâ€™ll need an OBDII scanner, a multimeter, and possibly wiring diagrams for your specific Mercury model to accurately diagnose the issue.