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Engine-Codes – Generic – P0268

P0268 Code - Cylinder 3 Injector Control Circuit High Voltage

Quick Answer

The OBD-II code P0268 indicates a problem with the control circuit of the fuel injector for cylinder 3 in the engine. Common causes include Faulty fuel injector for cylinder 3, Wiring issues in the injector control circuit, Problem with the Engine Control Module (ECM). 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 indicates Cylinder 3 Injector Control Circuit High Voltage.
Common causes
Common causes include Faulty fuel injector for cylinder 3, Wiring issues in the injector control circuit, Problem with the Engine Control Module (ECM).
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P0268 Description

The OBD-II code P0268 indicates a problem with the control circuit of the fuel injector for cylinder 3 in the engine. This means that the voltage in the circuit is higher than the specified range, causing issues with the injector's operation. The fuel injector is responsible for delivering the precise amount of fuel into the combustion chamber at the right time. When the control circuit voltage is too high, it can lead to erratic fuel delivery or even no fuel delivery at all to cylinder 3, affecting the engine's performance.

OBDII Code P0268 - Cylinder 3 Injector Control Circuit High Voltage
P0268 Code - Cylinder 3 Injector Control Circuit High Voltage

Common Causes of P0268

  1. Faulty fuel injector for cylinder 3
  2. Wiring issues in the injector control circuit
  3. Problem with the Engine Control Module (ECM)
  4. Poor electrical connection

Symptoms of P0268

  1. Rough idling
  2. Engine misfires
  3. Hesitation or stumbling during acceleration
  4. Poor fuel economy
  5. Engine stalling

How to Fix P0268

  1. Begin by inspecting the wiring harness and connectors in the injector control circuit for any damage or corrosion. Repair or replace as needed.
  2. Test the fuel injector for cylinder 3 to determine if it is faulty. Replace the injector if necessary.
  3. Check the Engine Control Module (ECM) for any signs of damage or malfunction. Replace the ECM if it is the cause of the high voltage issue.
  4. Clear the diagnostic trouble codes from the vehicle's memory using a scan tool.
  5. Test drive the vehicle to ensure that the issue has been resolved and that the code does not reappear.

Cost to Fix P0268

The typical repair costs for addressing a P0268 code can range from $150 to $500, depending on the specific cause of the issue and the labor rates in your area. This estimate includes the cost of parts, such as a new fuel injector or ECM, as well as labor charges. It's important to keep in mind that actual costs can vary based on factors like the make and model of the vehicle, the location of the repair shop, and the extent of the repairs needed. Be sure to consult with a trusted mechanic or repair shop for a more accurate estimate.

What does this mean?

Tech Notes for P0268

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

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Code P0268 Information for Specific Makes

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.

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