U1010 fault code: what it means

U1010: PHEV ECU CAN parity/toggle-bit error: corrupted messages from the PHEV ECU. Often stored after a 12 V battery problem.

Network (communication between modules) · Minor

Usual causes, most likely first

weak 12 V battery or voltage dip
CAN wiring fault
PHEV-ECU

U1010 by make

Mitsubishi

PHEV ECU CAN parity/toggle-bit error: corrupted messages from the PHEV ECU. Often stored after a 12 V battery problem.

Usual causes: weak 12 V battery or voltage dip; CAN wiring fault; PHEV-ECU

Nissan

Control unit internal CAN fault: the module that stored it (often BCM, ABS or TCM) has an internal CAN controller problem.

Usual causes: the module storing the code (internal fault); supply voltage dropout

Not sure what U1010 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.