AutoCodes – Isuzu – P0673 Isuzu

P0673 Isuzu Code - Cylinder 3 Glow Plug Circuit Fault

Quick Answer

The glow plug system is used to assist in providing the heat required to begin combustion during cold engine temperatures. Common causes include Faulty cylinder #3 glow plug, Cylinder #3 glow plug harness is open or shorted, Cylinder #3 glow plug 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: P0673 Isuzu indicates Cylinder 3 Glow Plug Circuit Fault.
Common causes: Common causes include Faulty cylinder #3 glow plug, Cylinder #3 glow plug harness is open or shorted, Cylinder #3 glow plug 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 8,053

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 May 05, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0673 Isuzu Description

The glow plug system is used to assist in providing the heat required to begin combustion during cold engine temperatures. The glow plugs are heated before and during cranking, as well as initial engine operation. The Engine Control Module (ECM) controls the glow plug ON times by monitoring coolant temperature and glow plug voltage. The California Glow Plug system has eight individual glow plug supply circuits between the controller and the glow plugs. If the feedback voltage from the controller to the ECM is not within range, the ECM sets the OBDII code.

OBDII Code P0673 Isuzu - Cylinder 3 Glow Plug Circuit Fault - AutoCodes.com — P0673 Isuzu Code - Cylinder 3 Glow Plug Circuit Fault

What does this mean?

What are the Possible Causes of the DTC P0673 Isuzu?

Faulty cylinder #3 glow plug
Cylinder #3 glow plug harness is open or shorted
Cylinder #3 glow plug circuit poor electrical connection
Faulty glow plug module

How to Fix the DTC P0673 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 P0673 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 P0673 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 P0673 Isuzu Code

1. What does the OBDII code P0673 mean for an Isuzu?

P0673 indicates a fault in the glow plug circuit for cylinder 3, meaning the glow plug is not heating up properly due to a circuit issue.

2. What are the common symptoms of code P0673 in an Isuzu?

Symptoms may include difficulty starting the engine in cold weather, rough idling, reduced fuel efficiency, or the check engine light being illuminated.

3. What causes the P0673 code to appear in an Isuzu?

Common causes include a faulty glow plug, damaged wiring, corroded electrical connections, or a malfunctioning glow plug control module.

4. Can I still drive my Isuzu with a P0673 code?

While the vehicle may still run, driving with a P0673 code can lead to hard starts in cold weather and may cause further damage to the glow plug system if not addressed.

5. How do I diagnose the P0673 code in an Isuzu?

Start by inspecting the cylinder 3 glow plug, checking for damage or wear. Then, test the wiring, connections, and glow plug control module for faults.

6. How do I fix the P0673 code on my Isuzu?

Repairs may involve replacing the faulty cylinder 3 glow plug, repairing or replacing damaged wiring, cleaning corroded connections, or replacing the glow plug control module.

7. How much does it cost to fix code P0673 on an Isuzu?

The repair cost can range from $50 to $200 for a glow plug replacement, while wiring or control module repairs may cost more depending on labor and parts.

8. Can a bad glow plug cause engine damage in my Isuzu?

A single bad glow plug usually wonâ€™t cause engine damage, but prolonged issues can lead to starting difficulties and increased stress on the engine.

9. How can I prevent the P0673 code from recurring in my Isuzu?

Regular maintenance, inspecting glow plugs for wear, and ensuring electrical connections are clean and secure can help prevent this issue.

10. Do I need special tools to replace a glow plug in my Isuzu?

Yes, you may need a glow plug socket or wrench and a multimeter to test the circuit. Always refer to the vehicle's service manual for specific instructions.