What Does P067D Mean?
The PCM has detected a high voltage condition on the glow plug control circuit for cylinder 5, indicating an open circuit or extremely high resistance. The glow plug for this cylinder is likely not heating properly. The driver may experience hard cold starts, white exhaust smoke, and rough idle during the first few minutes of cold engine operation.
Common Causes
40%
Burned out or open cylinder 5 glow plug element
25%
Open circuit in wiring harness to cylinder 5 glow plug
20%
Corroded or backed-out connector terminal at cylinder 5
10%
Glow plug control module open high-side driver for cylinder 5
5%
Poor engine ground affecting glow plug return path
Diagnostic Steps
1
Remove the electrical connector from the cylinder 5 glow plug and measure resistance across the plug terminals; OL (infinite) confirms a burned-out element.
2
Check for continuity from the GPCM output connector pin for cylinder 5 to the glow plug connector; an open indicates a broken wire or bus bar issue.
3
Inspect the glow plug bus bar connections (if applicable) for corrosion, loose nuts, or broken bus bar sections between cylinders.
4
Measure voltage at the cylinder 5 glow plug connector while commanding the GPCM on; you should see battery voltage. No voltage points to a harness or module fault.
5
Compare glow plug resistance values across all cylinders to identify if cylinder 5 is an outlier, which helps confirm plug failure versus wiring.
Estimated Repair Cost
$50 - $400
Parts + labor, varies by vehicle and location
The PCM has detected a high voltage condition on the glow plug control circuit for cylinder 5, indicating an open circuit or extremely high resistance. The glow plug for this cylinder is likely not heating properly. The driver may experience hard cold starts, white exhaust smoke, and rough idle duri...
The most common cause of P067D (Cylinder 5 Glow Plug Control Circuit High) is: Burned out or open cylinder 5 glow plug element
Typical repair costs for P067D range from $50 to $400, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The vehicle is safe to drive once warmed up. Cold weather starting will be compromised, and the affected cylinder may run rough until it reaches operating temperature. Prolonged cold misfiring can wash cylinder walls with fuel, accelerating wear and contaminating engine oil.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P067D to identify the root cause.
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Quick Info
Category
Powertrain
System
Diesel Cold Start / Glow Plug System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
