[SOLVED] Jeep P0674 Code: Fast Fix For Cylinder 4 Glow Plug Circuit

The OBD code P0674 for Jeep indicates a fault with the Cylinder #4 Glow Plug Circuit.

Symptoms include the Engine Light ON, lack of power, hard starting, and engine hesitation.

This issue is commonly caused by a faulty glow plug, wiring harness issues, or a defective glow plug module.

It is important to visually inspect the wiring harness and connectors for any damage and ensure proper electrical connections.

Repair Importance Level	10.0 (Out of 10)
Estimated Repair Time	Approximately 1.0 hour
Repair Difficulty Level	10.0 (Out of 10)

Symptoms of the Jeep p0674 OBD Code

The Jeep is experiencing a fault with code P0674 related to cylinder 4 glow plug circuit.

With Jeep OBD code P0674, the Engine Light will be ON.
Lack/Loss of Power may be experienced.
The engine may be harder to start.
Engine hesitation can occur.

Causes of the Jeep p0674 OBD Code

P0674 in a Jeep indicates a fault related to cylinder 4 glow plug circuit.

Do you know you can clear most fault codes—but some could mean serious danger? Don’t take chances with your safety or your family’s safety. This budget-friendly car scanner makes it easy to clear fault codes in seconds while showing you exactly what’s wrong. Plug it in, connect to your Android or iOS phone, and instantly check live data. You’ll know if it’s a minor issue you can clear or something serious that needs attention—so you can drive safely and stress-free. (Today’s Deal)

P0674 can be caused by a Faulty Cylinder #4 Glow Plug.
A Cylinder #4 Glow Plug harness that is open or shorted.
A Cylinder #4 Glow Plug circuit with poor electrical connection.
Or a Faulty Glow Plug Module.

Fixing Jeep Error Code p0674 Step By Step

Address the issue by inspecting and potentially replacing the glow plug circuit in a Jeep with code P0674.

To fix Jeep OBDII code P0674, start by reviewing the possible causes mentioned above.
Visually examine the wiring harness and connectors related to glow plug circuit 4.
Check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
Test the glow plug circuit 4 for continuity and resistance.
Replace any faulty glow plugs if necessary.
Clear the fault codes and perform a test drive to verify the repair.

Cost Of Fixing Jeep p0674 Fault Code

The repair for fault code P0674 on a Jeep involves diagnosing and replacing a glow plug circuit issue.

The cost to diagnose and fix Jeep OBD code P0674 is typically based on an estimated repair time of 1. 0 hour.

Labor rates range from $75 to $150 per hour, so the cost can vary between $75 and $150, excluding parts.

Factors like shop rates and the complexity of the repair can influence the final cost.

That fault code is a turning point. If repair costs are climbing and your current loan feels like it’s holding you back, this is the time to plan ahead. The free Car Loan Payment Tracker helps you see how quickly you can pay off what’s left—and start preparing, with confidence, for your dream car.

Details of the Jeep p0674 OBD Code

Fault code P0674 in a Jeep indicates a cylinder 4 glow plug circuit issue.

OBD code P0674 for Jeep vehicles indicates a problem with Cylinder 4 Glow Plug Circuit.

This code is triggered by the Engine Control Module (ECM) when it detects a fault in the glow plug circuit for cylinder 4. Glow plugs are used to help with cold starting diesel engines by heating the combustion chamber for easier ignition.

When this code sets, it means there is an issue with the glow plug circuit for cylinder 4 specifically.

This could be due to a faulty glow plug, wiring issue, or a problem with the glow plug control module.

Mechanic’s Tech Notes

Detailed information on diagnosing and repairing fault code P0674 in a Jeep vehicle.

To diagnose and fix OBDII code P0674 on a Jeep, start by checking the glow plug circuit for cylinder 4. Use a voltmeter to test the glow plug’s resistance and ensure it falls within specifications.

Inspect the wiring harness and connectors for any damage, corrosion, or poor connections.

Verify power and ground to the glow plug control module using a multimeter.

A scan tool can help monitor the module’s operation and communication over the network.

If no issues are found, consider replacing the glow plug for cylinder 4. Remember to clear the code after repairs are made.

FAQ

1. What does OBD code P0674 mean in a Jeep vehicle?

OBD code P0674 in a Jeep means an issue with Cylinder #4 Glow Plug circuit. Symptoms include engine light on, lack of power, and engine hesitation. Check related components for faults.

2. What are the common causes of OBD code P0674 in a Jeep?

Common causes of OBD code P0674 in a Jeep include a faulty Cylinder #4 Glow Plug, open/shorted harness, poor electrical connection, or faulty Glow Plug Module.

3. How can I diagnose and fix OBD code P0674 in my Jeep?

Diagnose and fix OBD code P0674 in your Jeep by checking Cylinder #4 Glow Plug and related wiring for faults. Repair as needed.

Wrap Up

If your Jeep is displaying OBD code p0674 and experiencing rough idling or difficulty starting, it may be caused by a faulty glow plug circuit in cylinder 4. This could be due to a defective glow plug, damaged wiring, or a poor connection at the glow plug control module.

To address Jeep OBD code p0674, check the glow plug in cylinder 4 for proper operation, inspect the wiring harness for any signs of damage or corrosion, and ensure secure connections at the glow plug control module.

Replace any faulty components as needed to resolve the issue.