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Engine-Codes – Lexus – P0204 Lexus

P0204 Lexus Code - Injector Circuit Open Cylinder 4

Quick Answer

The P0204 diagnostic trouble code for a Lexus indicates an issue with the injector circuit in cylinder 4. Common causes include Faulty fuel injector in cylinder 4, Wiring issue in the injector 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
P0204 Lexus indicates Injector Circuit Open Cylinder 4.
Common causes
Common causes include Faulty fuel injector in cylinder 4, Wiring issue in the injector 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 P0204 Lexus Description

The P0204 diagnostic trouble code for a Lexus indicates an issue with the injector circuit in cylinder 4. The fuel injector in this cylinder is not receiving the proper electrical signal, leading to an open circuit. This can result in the injector not functioning correctly, causing a disruption in the fuel delivery to the engine.

OBDII Code P0204 Lexus - Injector Circuit Open Cylinder 4
P0204 Lexus Code - Injector Circuit Open Cylinder 4

Common Causes of P0204 Lexus

  1. Faulty fuel injector in cylinder 4
  2. Wiring issue in the injector circuit
  3. Problem with the engine control module (ECM)
  4. Poor connection in the circuit
  5. Corrosion or damage to electrical connections

Symptoms of P0204 Lexus

  1. Engine misfires
  2. Rough idling
  3. Decreased fuel efficiency
  4. Engine hesitation
  5. Illuminated check engine light

How to Fix P0204 Lexus

  1. Begin by diagnosing the specific cause of the issue, such as testing the fuel injector, inspecting the wiring, and checking the ECM.
  2. Replace the faulty fuel injector in cylinder 4 if necessary.
  3. Repair any damaged or corroded wiring in the injector circuit.
  4. Check and clean any electrical connections related to the injector circuit.
  5. Clear the diagnostic trouble code and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0204 Lexus

The cost of repairing a P0204 code in a Lexus can vary depending on the specific cause of the issue. On average, the cost of replacing a fuel injector can range from $150 to $300 per injector, not including labor costs. The total repair cost, including parts and labor, can range from $200 to $600. Keep in mind that labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate.

When is the Code Detected?

The P0204 is set if the Engine Control Module (ECM) is detects a low or high voltage drop or resistance at the injector 4.

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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.

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