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Engine-Codes – Generic – P0273

P0273 Code - Cylinder 5 Injector Control Circuit Low Voltage

Quick Answer

When a vehicle's Engine Control Module (ECM) detects a low voltage condition in the control circuit of the fuel injector for cylinder 5, it triggers diagnostic trouble code P0273. Common causes include Faulty fuel injector, Damaged wiring or connectors in the injector control circuit, Defective 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
P0273 indicates Cylinder 5 Injector Control Circuit Low Voltage.
Common causes
Common causes include Faulty fuel injector, Damaged wiring or connectors in the injector control circuit, Defective 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 07, 2024
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Code P0273 Description

When a vehicle's Engine Control Module (ECM) detects a low voltage condition in the control circuit of the fuel injector for cylinder 5, it triggers diagnostic trouble code P0273. This code indicates that there is an issue with the fuel injector control circuit for the fifth cylinder in the engine. The fuel injector control circuit is responsible for delivering the precise amount of fuel to the corresponding cylinder at the correct time. When the voltage in this circuit drops below the specified threshold, it can lead to a lean fuel mixture, misfire, rough idle, decreased engine performance, and potentially engine stalling.

OBDII Code P0273 - Cylinder 5 Injector Control Circuit Low Voltage
P0273 Code - Cylinder 5 Injector Control Circuit Low Voltage

Common Causes of P0273

  1. Faulty fuel injector
  2. Damaged wiring or connectors in the injector control circuit
  3. Defective Engine Control Module (ECM)
  4. Clogged fuel injector
  5. Fuel supply system issues

Symptoms of P0273

  1. Rough idling or engine misfires
  2. Decreased engine performance or power
  3. Engine stalling or hesitation during acceleration
  4. Increased fuel consumption
  5. Illumination of the check engine light

How to Fix P0273

  1. Diagnose the issue with a scan tool to confirm the P0273 code and pinpoint the exact cause of the problem.
  2. Inspect the wiring and connectors in the injector control circuit for any damage or corrosion. Repair or replace as needed.
  3. Test the fuel injector for proper operation and flow. Replace the injector if it is faulty.
  4. Check the fuel supply system for any blockages or restrictions. Clean or replace any components as necessary.
  5. Clear the trouble code from the ECM and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0273

The cost of repairing a Cylinder 5 Injector Control Circuit Low Voltage issue can vary depending on the specific cause of the problem and the vehicle's make and model. Typically, the cost of parts for a fuel injector replacement ranges from $100 to $300, while labor costs can range from $100 to $300. Overall, the total repair cost for this issue can range from $200 to $600. It's important to note that labor rates at auto repair shops can vary, so it's advisable to obtain quotes from multiple shops to get a more accurate estimate.

What does this mean?

Tech Notes for P0273

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 P0273 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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