Q: Code P0451

asked by on

Is it safe to drive with code p0451

My car has 104000 miles.
My car has an automatic transmission.

P0451 will set if the PCM (powertrain control module) detects an incorrect, erratic, or otherwise improper voltage signal from the evaporative emission control system pressure sensor. The underlying cause is usually due to a defect in, or damage to, the gas tank, a problem with the fuel tank sending unit, a faulty fuel tank pressure sensor, an open or shorted fuel tank pressure sensor circuit, a faulty canister vent valve (uncommon), or a faulty PCM (very rare). Inasmuch as there are usually no discernible or outward symptoms, other than the Check Engine Light illuminating, some vehicle owners assume that a P0451 code is not a serious issue and that it doesn’t need to be resolved until the vehicle is due for an OBD-II emissions test. However, the vehicle malfunction reflected in the code can result in significantly lower fuel efficiency, and it can trigger other problems as well. Thus, it’s important to resolve it before it costs you more time and money later on. To have the issue identified and resolved, the recommended service is a check engine light diagnostic. If you request that service, a certified Mechanic, dispatched by YourMechanic will come right to your location, will get this resolved for you promptly. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Got 1 cup of water in gas, used 3 ans dry gas, 2 days later car is knocking, my perminent damage is?

I doubt there is permanent damage, but you need to get the water out of there or there will be. The best way to get the water out is with the fuel pump. The water will settle in the bottom...

Q: I need to know where the fuel cut off switch is at

An auto fuel cutoff switch is a safety feature that is only supposed to activate in a collision. If you merely ran out of gas, or ran low on gas, the status of this switch is probably irrelevant. Nevertheless, if...

Q: I accidentally drained the transmission fluid on my car

It's not at all likely that you damaged the transmission as long as it wasn't started. Technically, you can put the CVT fluid back in, but it needs to be done from the same hole it was drained from. This...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.