AutoCodes – Isuzu – P1205 Isuzu

P1205 Isuzu Code - Injector Circuit Open / Shorted Cylinder #5

Quick Answer

P1205 Isuzu indicates Injector Circuit Open / Shorted Cylinder #5. Common causes include Faulty Fuel Injector #5, Fuel Injector #5 harness is open or shorted, Fuel Injector #5 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
P1205 Isuzu indicates Injector Circuit Open / Shorted Cylinder #5.
Common causes
Common causes include Faulty Fuel Injector #5, Fuel Injector #5 harness is open or shorted, Fuel Injector #5 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 3,153
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 12, 2019
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Code P1205 Isuzu Description

OBDII Code P1205 Isuzu - Injector Circuit Open / Shorted Cylinder #5 - AutoCodes.com
P1205 Isuzu Code - Injector Circuit Open / Shorted Cylinder #5

What are the Possible Causes of the DTC P1205 Isuzu?

  • Faulty Fuel Injector #5
  • Fuel Injector #5 harness is open or shorted
  • Fuel Injector #5 circuit poor electrical connection

How to Fix the DTC P1205 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 P1205 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.

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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 P1205 Isuzu Code

1. What does the OBDII code P1205 mean for an Isuzu?

P1205 indicates an issue with the injector circuit for cylinder #5, such as an open or shorted circuit.

2. What are the common symptoms of P1205 on an Isuzu vehicle?

Symptoms may include rough idling, misfires, poor acceleration, reduced fuel efficiency, and the Check Engine Light turning on.

3. What causes the P1205 code to appear on an Isuzu?

Common causes include a faulty fuel injector, damaged wiring or connectors, a malfunctioning engine control module (ECM), or poor electrical connections.

4. How can I diagnose the P1205 code on my Isuzu?

Inspect the wiring and connectors for cylinder #5, test the injector with a multimeter, and check for continuity or shorts in the circuit.

5. Can a bad ECU cause the P1205 code on an Isuzu?

Yes, a malfunctioning engine control unit (ECU) can fail to properly control the injector circuit, triggering the P1205 code.

6. Is it safe to drive my Isuzu with the P1205 code?

Driving with this code is not recommended as it can lead to engine misfires, reduced performance, and potential damage to the engine over time.

7. How do I fix the P1205 code on my Isuzu?

Repairs may involve replacing the cylinder #5 fuel injector, repairing or replacing damaged wiring, or reprogramming or replacing the ECU if necessary.

8. Can a clogged fuel injector cause the P1205 code on an Isuzu?

No, P1205 specifically relates to an open or short in the injector circuit, not a clogged injector. However, cleaning the injector can help eliminate other potential issues.

9. How much does it cost to fix the P1205 code on an Isuzu?

Repair costs can vary, typically ranging from $150 to $400, depending on whether the issue is with the injector, wiring, or ECU.

10. Can I reset the P1205 code on my Isuzu without fixing it?

Clearing the code without addressing the root cause may temporarily turn off the Check Engine Light, but the issue will likely return and could worsen.

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