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P0C73 fault code: what it means

P0C73: BYD (SAE code): motor electronics coolant pump control performance fault. Power may be limited.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

  1. electric coolant pump
  2. wiring
  3. fuse

P0C73 by make

BYD

BYD (SAE code): motor electronics coolant pump control performance fault. Power may be limited.

Usual causes: electric coolant pump; wiring; fuse

GWM

GWM hybrid/EV: motor electronics coolant pump control performance fault. Power may be limited.

Usual causes: electric coolant pump; wiring; fuse

Haval

Haval hybrid: motor electronics coolant pump control performance fault. Power may be limited.

Usual causes: electric coolant pump; wiring; fuse

Hyundai

Motor electronics coolant pump control performance fault. Power may be limited to protect the motor/inverter.

Usual causes: failed electric coolant pump; wiring; fuse

Kia

Motor electronics coolant pump control performance fault. Power may be limited to protect the motor/inverter.

Usual causes: failed electric coolant pump; wiring; fuse

LDV

LDV EV: motor electronics coolant pump control performance fault. Power may be limited.

Usual causes: electric coolant pump; wiring; fuse

Lexus

Inverter coolant pump control performance on a Lexus hybrid: the electric pump that cools the inverter is not working. Inverter overheats and power is cut.

Usual causes: failed inverter coolant pump; low inverter coolant or air lock; pump wiring or fuse fault

Mazda

SKYACTIV-D 1.5 electric water pump not working normally. Charge air cooling is reduced; power may be restricted.

Usual causes: electric water pump seized or impeller damaged; low intercooler coolant; wiring fault

MG

MG EV/PHEV: motor electronics coolant pump control performance fault. Power may be limited.

Usual causes: electric coolant pump; wiring; fuse

Toyota

Inverter (motor electronics) coolant pump control performance: the electric pump that cools the inverter is not working right. Inverter overheats and power is cut.

Usual causes: failed electric inverter coolant pump; low inverter coolant or air in the system; pump wiring or fuse fault

What the repair usually costs

Not sure what P0C73 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.