P037D

DTC P037D, sometimes indicated as P037D00 is an OBD diagnostic trouble code indicating a generic fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the ignition system causing glow plug sense circuit.

The glow plug sense circuit monitors the voltage at the glow plugs. If this voltage is too low, the DTC P037D is set.
There are several possible causes for this DTC, including a faulty glow plug, a faulty glow plug relay, or a faulty glow plug sensor.
If the glow plugs are suspected to be at fault, they should be tested and replaced if necessary. If the glow plug relay is suspected to be at fault, it should be replaced. If the glow plug sensor is suspected to be at fault, it should be replaced.

• P037D: Glow Plug Sense Circuit
• P037D: Glow plug monitoring – circuit malfunction
• P037D 00: Glow plug monitoring - circuit malfunction