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P0451

Evaporative Emission (EVAP) Pressure Sensor — Reading Out of Range

Low — fix soonSafe to drive for now

Severity: Fix soon. Usually safe to drive for now.

What P0451 means

The sensor that measures pressure in the fuel vapor system is reporting values the computer does not expect.

Common causes

How to fix it

Check the sensor wiring and hoses, then test and replace the pressure sensor.

Can I drive with P0451?

Safe to drive. It is an emissions monitoring issue.

Related codes

P0401Exhaust Gas Recirculation (EGR) — Not Enough FlowP0402Exhaust Gas Recirculation (EGR) — Too Much FlowP0403Exhaust Gas Recirculation (EGR) — Circuit ProblemP0410Secondary Air Injection System Problem

Questions, answered

Is it safe to drive with code P0451?

Generally safe to drive, but get it checked soon. Safe to drive. It is an emissions monitoring issue.

What causes code P0451?

The most common causes are: Failed fuel tank pressure sensor; Damaged wiring or connector; Blocked EVAP hose; Failing charcoal canister. A scan tool and a visual check of the parts above is where a technician starts.

How do I fix code P0451?

Check the sensor wiring and hoses, then test and replace the pressure sensor.

Not repair advice. This page gives general information about code P0451 only. Cars differ by make, model and year — confirm the fault with a scan tool and have the repair done by a qualified technician.

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