LG Oven Error Code C-d0

The C-d0 code means the oven's control system has detected a shorted key on the keypad, meaning one or more buttons are registering as continuously pressed. The Sub PCB, which processes keypad input, triggers this fault when it cannot distinguish normal key presses from a persistent closed circuit. The issue is typically in the keypad membrane, the ribbon cable connection, or the connector on the Sub PCB.

It is not recommended to operate the oven while this error is present. A shorted key condition can prevent proper control input, potentially locking out safety functions or causing unintended behavior from the control board. Disconnect power to the oven until the fault is diagnosed and resolved.

If the repair only requires reseating the ribbon cable, there is no parts cost and only your time is involved. Replacing the keypad membrane assembly typically costs between $30 and $90 for the part depending on the model. If the Sub PCB needs to be replaced, parts can range from $80 to $200 or more, and professional labor will add to the total cost.

Yes, in many cases this is a DIY-friendly repair. Start by unplugging the oven and accessing the control panel to check whether the keypad ribbon cable is fully inserted into the Sub PCB connector. If reseating the cable does not clear the fault, the keypad membrane assembly is the next component to replace, which is a straightforward part swap on most LG oven models.

A power reset, such as unplugging the oven or tripping the circuit breaker for a few minutes, may temporarily clear the display, but the code will return if the underlying short condition in the keypad or cable is not corrected. A reset alone is not a fix and should only be used as part of diagnosing whether the fault is intermittent.