P0674 OBD-II: Cylinder 4 Glow Plug Circuit/Open

P0674 Severity

Urgent

Should you fix P0674 yourself?

Identifying an OBD code is just the start of a complete diagnostic routine. Most trouble codes are caused by a sensor reporting a value that is out of range. Just replacing a sensor may not fix underlying issues. Be sure to understand the code, the part or system in your car that the code refers to, and the risks of delaying professional repair.

Proper diagnosis will save you time and money on unnecessary repairs.

Urgent codes indicate immediate action is necessary. These are urgent and significant malfunctions that can cause severe damage to the vehicle or harm the driver and passengers.

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What causes OBD-II fault code P0674?

The Glow Plug is used on diesel engines to preheat the cylinder before the engine is started. If the engine control module (PCM) detects the glow plug for cylinder four is not operating properly, the PCM will set code P0674.

OBD II Fault Code

OBD II P0674

OBD-II Code Hard or no start in cold weather is defined as a Cylinder 4 Glow Plug Circuit/Open

Hard or no start in cold weather Symptoms

Engine may not start
Hard or no start in cold weather

Common Problems That Trigger the P0674 Code

Glow plug control module failure
Glow plug failure
Glow plug wiring harness failure

Common Repairs Needed for the P0674 Code

Glow Plug Replacement

OBD Code Resources

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OBD II Fault Code

OBD II P0674

OBD-II Code Hard or no start in cold weather is defined as a Cylinder 4 Glow Plug Circuit/Open

Hard or no start in cold weather Symptoms

Engine may not start
Hard or no start in cold weather

Common Problems That Trigger the P0674 Code

Glow plug control module failure
Glow plug failure
Glow plug wiring harness failure

Common Repairs Needed for the P0674 Code

Glow Plug Replacement

P0674 OBD-II: Cylinder 4 Glow Plug Circuit/Open

Should you fix P0674 yourself?

What causes OBD-II fault code P0674?

Need a P0674 diagnosis? Trust our experts.

OBD II Fault Code

Hard or no start in cold weather Symptoms

Common Problems That Trigger the P0674 Code

Common Repairs Needed for the P0674 Code

OBD Code Resources

Ask our experts about P0674.

Other OBD-II Codes

OBD II Fault Code

Hard or no start in cold weather Symptoms

Common Problems That Trigger the P0674 Code

Common Repairs Needed for the P0674 Code