AutoCodes – RAM – P0673 RAM

P0673 RAM 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 RAM 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 744

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 13, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0673 RAM 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 glow plug system has 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. The Diagnostic Trouble Code (DTC) will set if the Engine Control Module has detected a fault in the cylinder #3 glow plug circuit.

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

What does this mean?

What are the Possible Causes of the DTC P0673 RAM?

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 RAM?

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 RAM 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 P0673 RAM Code

1. What are the common symptoms of OBDII code P0673 related to Cylinder 3 Glow Plug Circuit Fault?

- Common symptoms include difficult starting, misfiring, rough idling, and a decrease in engine performance.

2. What are the possible causes of OBDII code P0673 indicating a Cylinder 3 Glow Plug Circuit Fault?

- Possible causes include a faulty glow plug in cylinder 3, damaged wiring or connectors in the glow plug circuit, or a problem with the glow plug control module.

3. How can I diagnose the issue related to OBDII code P0673 for Cylinder 3 Glow Plug Circuit Fault?

- Diagnose the issue by checking the glow plug in cylinder 3 for continuity, inspecting the wiring and connectors for damage, and testing the glow plug control module for proper functionality.

4. Can I still drive my vehicle with OBDII code P0673 indicating a Cylinder 3 Glow Plug Circuit Fault?

- It is not recommended to drive your vehicle with a Cylinder 3 Glow Plug Circuit Fault as it can lead to engine performance issues and potential damage if left unresolved.

5. How can I repair OBDII code P0673 for a Cylinder 3 Glow Plug Circuit Fault?

- Repair the issue by replacing the faulty glow plug in cylinder 3, repairing any damaged wiring or connectors in the circuit, or replacing the glow plug control module if necessary.

6. Are there any safety precautions to keep in mind when working on the glow plug circuit for OBDII code P0673?

- Safety precautions include disconnecting the battery before working on the circuit, allowing the engine to cool down before touching any components, and using proper tools and equipment.

7. How important is it to address OBDII code P0673 indicating a Cylinder 3 Glow Plug Circuit Fault promptly?

- It is important to address the issue promptly to prevent further damage to the engine, improve fuel efficiency, and ensure smooth operation of the vehicle.

8. Can weather conditions affect the performance of glow plugs and trigger OBDII code P0673 for Cylinder 3 Glow Plug Circuit Fault?

- Yes, extreme cold weather can affect the performance of glow plugs, leading to issues like Cylinder 3 Glow Plug Circuit Fault triggering the OBDII code P0673.

9. Is it possible for a DIY enthusiast to repair OBDII code P0673 related to a Cylinder 3 Glow Plug Circuit Fault?

- Yes, with the right tools, knowledge, and safety precautions, a DIY enthusiast can replace a faulty glow plug, repair wiring issues, or replace the glow plug control module to resolve the fault.

10. How long does it typically take to repair OBDII code P0673 for a Cylinder 3 Glow Plug Circuit Fault?

- The repair time can vary depending on the exact issue, but replacing a glow plug or repairing wiring may take around 1-2 hours, while replacing the glow plug control module could take longer.