P31E7 fault code: what it means

P31E7: Leaf: READY restart is blocked after a stored HV fault (usually P0AA6). Fix the main fault, not this code.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

HV isolation fault (see P0AA6)
electric A/C compressor fault (wrong oil or refrigerant overcharge)

P31E7 by make

Nissan

Leaf: READY restart is blocked after a stored HV fault (usually P0AA6). Fix the main fault, not this code.

Usual causes: HV isolation fault (see P0AA6); electric A/C compressor fault (wrong oil or refrigerant overcharge)

What the repair usually costs

A/C compressor replace incl. drier and flush (Japanese / Korean car / SUV)NZ$990–NZ$1,990 · A$960–A$1,930
A/C compressor replace incl. drier and flush (European)NZ$1,560–NZ$3,200 · A$1,490–A$3,050
EV battery pack replace (Tesla / Kona / Ioniq / MG / BYD, genuine)NZ$22,110–NZ$47,100 · A$21,240–A$45,230
EV electric A/C compressor replaceNZ$1,640–NZ$6,080 · A$1,620–A$5,920

Not sure what P31E7 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.