P0674: Cylinder 4 Glow Plug Circuit/Open
What Does P0674 Mean?
P0674 is a diagnostic trouble code indicating: Cylinder 4 Glow Plug Circuit/Open. This code relates to the computer and output circuits system. It has been reported in NHTSA complaints across 1 different vehicle models.
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"2014 VW PASSAT TDI SE 2.0L MANUAL MY VEHICLE HAS 62,583 MI. ON IT. I WAS DRIVING ON THE HIGHWAY WHEN THE DIESEL "GLOW PLUG" LIGHT BEGAN FLASHING ON THE DASHBOARD AND I LOST ALL ENGINE POWER. I WAS FORTUNATE TO BE ABLE TO REACH THE ROADSIDE SAFELY AND I WAS ABLE TO BRING THE CAR TO A HALT ON THE"
— Volkswagen Passat owner, 07/21/2017
Source: NHTSA Complaints Database
Most Reported Vehicles for P0674
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | VOLKSWAGEN PASSAT |
Frequently Asked Questions
Does this mean my car's computer is bad?
How much does an ECM replacement cost?
What To Do Next
Possible Fixes
- 🔧 Have the code scanned with a professional-grade scanner to read freeze frame data
- 🔧 If DIY repair isn't feasible, get a diagnostic from a trusted mechanic ($50-150)
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1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
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3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.