Honda
Fuel tank pressure (FTP) sensor range/performance problem. EVAP checks unreliable.
P0451 fault code: what it means
P0451: EVAP pressure sensor range/performance.
Usual causes, most likely first
- failing tank pressure sensor
- blocked vent line
- wiring fault
P0451 by make
Mercedes-Benz
Fuel tank pressure sensor out of range. Often a loose or missing fuel cap.
Nissan
EVAP control system pressure sensor range/performance problem. Leak checks are unreliable; no drive symptom.
Subaru
EVAP system pressure sensor range/performance.
Suzuki
EVAP system pressure sensor range/performance.
What the repair usually costs
- CVT valve body replacement (remanufactured, in car)NZ$1,280–NZ$2,420 · A$1,200–A$2,400
Not sure what P0451 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.