P1439 fault code: what it means

P1439: IMA motor drive module (MDM) short circuit detected. Assist is cut and the IMA light is on.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

motor drive module
IMA motor wiring
IMA battery fault

P1439 by make

Honda

IMA motor drive module (MDM) short circuit detected. Assist is cut and the IMA light is on.

Usual causes: motor drive module; IMA motor wiring; IMA battery fault

What the repair usually costs

EV battery pack replace (Tesla / Kona / Ioniq / MG / BYD, genuine)NZ$22,110–NZ$47,100 · A$21,240–A$45,230

Not sure what P1439 means on your car? Ask Credov.

Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.