AutoCodes – Pontiac – P0204 Pontiac

P0204 Pontiac Code - Cylinder 4 Injector Control Circuit

Quick Answer

The Engine Control Module (ECM) supplies voltage to each fuel injector on the high control circuits. Common causes include Faulty Fuel Injector 4, Fuel Injector 4 harness is open or shorted, Fuel Injector 4 circuit poor electrical connection. 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 Pontiac indicates Cylinder 4 Injector Control Circuit.
Common causes: Common causes include Faulty Fuel Injector 4, Fuel Injector 4 harness is open or shorted, Fuel Injector 4 circuit poor electrical connection.
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 5,669

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 Mar 23, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0204 Pontiac 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 open for greater than 2 s.

OBDII Code P0204 Pontiac - Cylinder 4 Injector Control Circuit - AutoCodes.com — P0204 Pontiac Code - Cylinder 4 Injector Control Circuit

What does this mean?

What are the Possible Causes of the DTC P0204 Pontiac?

Faulty Fuel Injector 4
Fuel Injector 4 harness is open or shorted
Fuel Injector 4 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0204 Pontiac?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0204 Pontiac 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.

Need more information about the P0204 Pontiac code?

Need more information on how to fix the P0204 Pontiac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0204 Pontiac code diagnosed by a professional: Find a repair shop in your area

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 P0204 Pontiac Code

1. What are the common symptoms of OBDII code P0204 in a Pontiac related to the Cylinder 4 Injector Control Circuit?

The common symptoms include engine misfires, rough idling, decreased fuel efficiency, and potential stalling or hesitation during acceleration.

2. What could cause the OBDII code P0204 to trigger in a Pontiac?

The code P0204 is typically triggered by a faulty fuel injector in cylinder 4, issues with the injector wiring or connectors, or a problem with the Engine Control Module (ECM).

3. How can I diagnose the cause of OBDII code P0204 in my Pontiac?

Diagnosing the issue involves checking the injector in cylinder 4 for proper operation, inspecting the wiring and connectors for damage or loose connections, and using a scan tool to monitor the ECM's commands to the injector.

4. Can a dirty fuel injector cause OBDII code P0204 in a Pontiac?

Yes, a dirty or clogged fuel injector in cylinder 4 can disrupt the injector control circuit and trigger the P0204 trouble code in a Pontiac.

5. What are some repair tips for fixing OBDII code P0204 in a Pontiac?

Repair options include cleaning or replacing the fuel injector in cylinder 4, repairing any damaged wiring or connectors, and resetting the ECM after addressing the issue.

6. Is it safe to continue driving my Pontiac with OBDII code P0204 present?

It is not recommended to drive the vehicle with the P0204 code active, as it can lead to poor engine performance, potential damage to the catalytic converter, and increased emissions.

7. Can I reset the OBDII code P0204 in my Pontiac without fixing the underlying issue?

While you can clear the code temporarily, it will likely return if the root cause, such as a faulty injector or wiring problem, is not addressed.

8. How much does it typically cost to repair OBDII code P0204 in a Pontiac?

The cost of repairing the P0204 code can vary depending on the exact cause of the issue, but it may involve expenses for parts, labor, and diagnostic services.

9. Are there any preventive measures to avoid OBDII code P0204 in a Pontiac?

Regularly servicing the fuel injection system, using quality fuel, and addressing any engine performance issues promptly can help prevent the occurrence of code P0204 in a Pontiac.

10. Can a DIY enthusiast fix OBDII code P0204 in a Pontiac, or should it be handled by a professional mechanic?

Depending on the individual's mechanical skills and access to tools, a DIY enthusiast may be able to diagnose and fix simple causes of the P0204 code, but complex issues may require the expertise of a professional mechanic.