What Does P067E Mean?
The PCM has detected a low voltage condition on the cylinder 6 glow plug control circuit. This typically means the glow plug or its wiring has a short to ground, drawing excessive current through the circuit. The driver may notice difficult cold starts, rough idle when cold, and possibly white exhaust smoke in cool ambient conditions.
Common Causes
40%
Cylinder 6 glow plug shorted internally
25%
Short to ground in the harness between GPCM and cylinder 6
20%
Glow plug control module output driver shorted
10%
Water intrusion at connector causing low-resistance ground path
5%
PCM-side control circuit issue
Diagnostic Steps
1
Measure the cylinder 6 glow plug resistance; normal is 0.5-2.0 ohms. A very low reading (near 0 ohms) indicates an internal short in the plug.
2
Disconnect the glow plug and measure the harness wire from the GPCM to cylinder 6 for resistance to ground; it should read OL (open). Any low reading indicates a harness short.
3
Inspect wiring along the rear of the engine (cylinder 6 is typically the farthest back) for heat damage from the exhaust manifold or turbo proximity.
4
Activate the GPCM with the cylinder 6 plug disconnected and measure output voltage at the GPCM connector; battery voltage confirms the module is functional.
5
Use a current clamp on the cylinder 6 feed wire during activation to measure actual current draw compared to specification (typically 15-25A per glow plug).
Estimated Repair Cost
$50 - $400
Parts + labor, varies by vehicle and location
The PCM has detected a low voltage condition on the cylinder 6 glow plug control circuit. This typically means the glow plug or its wiring has a short to ground, drawing excessive current through the circuit. The driver may notice difficult cold starts, rough idle when cold, and possibly white exhau...
The most common cause of P067E (Cylinder 6 Glow Plug Control Circuit Low) is: Cylinder 6 glow plug shorted internally
Typical repair costs for P067E range from $50 to $400, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive once running. Excessive current draw from a shorted glow plug can blow the glow plug fuse or damage the GPCM over time, which could then affect all cylinders. Repair soon to prevent cascading failures to the glow plug system.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P067E 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
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