BMW
Very small evaporative leak detected by the leak-check pump.
P0456 fault code: what it means
P0456: Very small leak in the EVAP system.
Usual causes, most likely first
- fuel cap not tightened or worn seal
- hairline crack in an EVAP line
- leaking purge or vent valve seal
P0456 by make
Ford
Small EVAP (fuel vapour) leak detected.
Holden
Small EVAP (fuel vapour) leak detected.
Hyundai
EVAP very small leak detected.
Jeep
Very small EVAP leak detected.
Kia
EVAP very small leak detected.
Mercedes-Benz
Small EVAP (fuel vapour) leak detected.
Mini
Very small evaporative leak.
Nissan
EVAP system very small leak. Nissan bulletin points to the vent control valve O-ring.
Subaru
Very small leak in the fuel vapour (evap) system.
Suzuki
Very small EVAP leak detected.
Toyota
EVAP system small leak detected in the fuel vapour system.
Volvo
Very small EVAP leak detected.
What the repair usually costs
- CVT valve body replacement (remanufactured, in car)NZ$1,280–NZ$2,420 · A$1,200–A$2,400
- A/C compressor replace incl. drier and flush (European)NZ$1,560–NZ$3,200 · A$1,490–A$3,050
Not sure what P0456 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.