The Lemon IndexThe fuel tank pressure reading doesn't make sense.
Drive on, get it checked. You can usually keep driving. Have the code read at your next service or within a few weeks.
Failed tank pressure sensor. Then: wiring fault.
Owners named P0451 in 12 complaints to the U.S. government, most often on the Chevrolet Silverado.
Cars owners report it on
Complaints that name P0451, by model. Raw counts, not a failure rate: popular models get more complaints.
The details
What P0451 means
The fuel tank pressure reading doesn't make sense.
Can I drive with P0451?
Drive on, get it checked. You can usually keep driving. Have the code read at your next service or within a few weeks.
42% of the owner complaints that name P0451 also say the car stalls or shuts off. A complaint can describe more than one problem, so this doesn't prove the code caused it.
Common causes of P0451
- Failed tank pressure sensor
- Wiring fault
A shop should confirm the cause with a scan and tests before replacing parts.
What owners describe
- Stalls or shuts off: 42% of complaints
- Loses power or goes into limp mode: 25% of complaints
- Shakes, runs rough or misfires: 25% of complaints
- Warning lights and electrical faults: 25% of complaints
Share of complaints naming the code whose text also mentions each problem.
Related codes
P0452 P0455 P0456 P0457 P0449 P0448 P0446 P0445
Quick answers
What does P0451 mean?
Evaporative Emission System Pressure Sensor/Switch Range/Performance. The fuel tank pressure reading doesn't make sense.
Can I drive with P0451?
Drive on, get it checked. You can usually keep driving. Have the code read at your next service or within a few weeks.
What causes P0451?
Failed tank pressure sensor; Wiring fault.
Counts: NHTSA owner complaints whose text names P0451. A complaint is an owner's report, not a diagnosis. Meanings: the standard SAE J2012 definitions in our own words; manufacturer codes only where verified for that make. General information, not repair advice for your car.