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Engine-Codes – Generic – P0277

P0277 Code - Cylinder 6 Injector Control Circuit High Voltage

Quick Answer

The P0277 diagnostic trouble code (DTC) indicates that there is a high voltage condition in the control circuit of the fuel injector for cylinder 6 in the engine. Common causes include Faulty fuel injector for cylinder 6, Short circuit in the wiring harness, Malfunctioning 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
P0277 indicates Cylinder 6 Injector Control Circuit High Voltage.
Common causes
Common causes include Faulty fuel injector for cylinder 6, Short circuit in the wiring harness, Malfunctioning 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 09, 2024
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Code P0277 Description

The P0277 diagnostic trouble code (DTC) indicates that there is a high voltage condition in the control circuit of the fuel injector for cylinder 6 in the engine. This means that the Engine Control Module (ECM) is detecting an abnormal voltage level in the circuit that controls the injector for cylinder 6, which can lead to various performance issues in the vehicle.

OBDII Code P0277 - Cylinder 6 Injector Control Circuit High Voltage
P0277 Code - Cylinder 6 Injector Control Circuit High Voltage

Common Causes of P0277

  1. Faulty fuel injector for cylinder 6
  2. Short circuit in the wiring harness
  3. Malfunctioning ECM
  4. Fuel injector driver circuit issue
  5. Poor electrical connection or corrosion in the circuit

Symptoms of P0277

  1. Rough idling or engine misfires
  2. Decreased fuel efficiency
  3. Loss of power or acceleration
  4. Check Engine Light illuminated
  5. Engine stalling or hesitation

How to Fix P0277

  1. Begin by conducting a thorough inspection of the wiring harness and connectors associated with the fuel injector for cylinder 6.
  2. Test the fuel injector's resistance and functionality to determine if it needs to be replaced.
  3. Check the ECM for any signs of damage or malfunction and perform diagnostic tests to confirm its functionality.
  4. Clear the DTC and perform a test drive to monitor the vehicle's performance and verify that the issue has been resolved.
  5. If the problem persists, consult a professional mechanic for further diagnosis and potential repairs.

Cost to Fix P0277

The typical cost to repair a high voltage condition in the fuel injector control circuit for cylinder 6 can range from $150 to $500, depending on the specific cause of the issue and the necessary repairs. This estimate includes the cost of parts such as a new fuel injector, wiring harness, or ECM, as well as labor charges for diagnosis and repair. Keep in mind that labor rates at auto repair shops can vary, so it's advisable to obtain quotes from multiple sources to ensure a competitive price.

What does this mean?

Tech Notes for P0277

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 P0277 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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