AutoCodes – Isuzu – P1204 Isuzu

P1204 Isuzu Code - Injector Circuit Open / Shorted Cylinder #4

Quick Answer

P1204 Isuzu indicates Injector Circuit Open / Shorted Cylinder #4. 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: P1204 Isuzu indicates Injector Circuit Open / Shorted Cylinder #4.
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 3,731

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 Jul 11, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1204 Isuzu Description

OBDII Code P1204 Isuzu - Injector Circuit Open / Shorted Cylinder #4 - AutoCodes.com — P1204 Isuzu Code - Injector Circuit Open / Shorted Cylinder #4

What does this mean?

What are the Possible Causes of the DTC P1204 Isuzu?

Faulty Fuel Injector #4
Fuel Injector #4 harness is open or shorted
Fuel Injector #4 circuit poor electrical connection

How to Fix the DTC P1204 Isuzu?

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 P1204 Isuzu 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 P1204 Isuzu code?

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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.

Frequently Asked Questions about P1204 Isuzu Code

1. What are common symptoms of OBDII code P1204 on an Isuzu related to the injector circuit of cylinder #4?

- Common symptoms may include engine misfires, rough idling, decreased fuel efficiency, and potential stalling.

2. What are the possible causes of OBDII code P1204 on an Isuzu indicating an open or shorted injector circuit for cylinder #4?

- Causes can include a faulty injector, damaged wiring or connectors, a blown fuse, or issues with the Engine Control Module (ECM).

3. How can I diagnose the injector circuit issue indicated by OBDII code P1204 on my Isuzu?

- Diagnose by checking the wiring and connectors for damage, testing the injector resistance, and using a scan tool to monitor injector operation.

4. Can driving with OBDII code P1204 on an Isuzu cause further damage to the vehicle?

- Continuing to drive with this code may lead to poor engine performance, increased emissions, and potential damage to the catalytic converter over time.

5. How can I repair the injector circuit open or shorted issue associated with OBDII code P1204 on my Isuzu?

- Repair options include replacing the faulty injector, repairing damaged wiring or connectors, checking and replacing fuses if necessary, and resetting the ECM.

6. Is it safe to continue driving my Isuzu with the P1204 code if the vehicle seems to be running fine?

- It is not recommended to drive with this code present, as it can lead to more serious issues and may affect the overall performance of the vehicle.

7. Are there any DIY tips for troubleshooting the injector circuit problem indicated by OBDII code P1204 on an Isuzu?

- DIY tips include visually inspecting the injector and its connections, checking for loose or damaged wires, and using a multimeter to test for continuity.

8. How much does it typically cost to repair the injector circuit issue causing OBDII code P1204 on an Isuzu?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $500 or more, including parts and labor.

9. Can a clogged fuel injector cause OBDII code P1204 on an Isuzu?

- While a clogged injector may not directly trigger this specific code, it can lead to similar symptoms and affect the performance of the affected cylinder.

10. Will resetting the OBDII system clear the P1204 code on my Isuzu, or is a repair necessary?

- Resetting the system may temporarily clear the code, but if the underlying issue causing the injector circuit problem is not addressed, the code is likely to return.