Code result
P037D
Glow Plug Sense Circuit
High severity
What it means
The diagnostic feedback line that monitors glow plug current draw reports a general electrical fault — open, shorted, or out of plausibility. Used to verify each plug actually heats up.
Is it safe to drive?
No — stop driving
This code points to a problem that can cause damage or affect safety. Avoid driving and have the vehicle diagnosed promptly.
Most likely causes
Sense circuit failed
highOne of the most commonly reported causes for this code — check this first.
Related help
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