P0454 OBD-II Trouble Code: Evaporative Emission Control System Pressure Sensor Intermittent

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P0454 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0454 code

P0454 is a diagnostic trouble code (DTC) for "Evaporative Emission Control System Pressure Sensor Intermittent". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $69.99. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$69.99$20.00
Toyota$69.99$20.00
BMW$69.99$20.00
SCHEDULE P0454 DIAGNOSTIC Get a fair and transparent estimate upfront

Check Engine Light

P0454 code definition

When the P0454 Trouble Code appears, it indicates that there is an issue with the evaporative emission control system pressure sensor intermittent.

What the P0454 code means

If this code is present in your vehicle, it means that the evaporation control system is not working correctly. The overall EVAP system contains a number of different parts including the fuel lines, the gas cap, purge valve, charcoal canister, flow sensors, system pressure, wiring, connectors, fuel tank, fuel vapor hoses, and the vacuum lines. This means that the issue could be caused due to a number of different problems.

What causes the P0454 code?

The following are some of the most common causes for the P0454 code.

  • Faulty fuel cap
  • Improperly installed fuel cap.
  • Faulty purge control solenoid.
  • Clogged charcoal canister
  • Broken charcoal canister
  • Broken or cracked vacuum
  • Broken or cracked fuel vapor hoses
  • Faulty pressure or flow sensor.
  • A bad powertrain control module is a possible cause, but it is very rare.

What are the symptoms of the P0454 code?

There will not likely be any noticeable performance difference in the vehicle, and many drivers do not know they have a problem until the Check Engine light comes on. Even then, they won’t be able to tell what’s wrong with the vehicle. When the P0454 code appears, it is common for other trouble codes related to the evaporative emissions control system to show up as well.

How does a mechanic diagnose the P0454 code?

A mechanic will want to gather information from the onboard computer on the vehicle. The data the computer can provide them with the information they need to perform a proper diagnosis and then to complete the repairs. They will use an OBD-II scanner, which connects to the computer and gathers the data. The mechanic will also reset the codes and then test the vehicle to see if the codes come back. In some cases, especially with older vehicles that have a lot of miles on them, there could be false alarms when a code appears. The mechanic wants to make sure it is a real problem before they try to repair the vehicle.

Common mistakes when diagnosing the P0454 code

One of the common problems when diagnosing and repairing the P0454 code is replacing the evaporative emission control system when there are other issues at play. Often, dealing with a vacuum leak, or making sure that the fuel cap is on properly is all the mechanic needs to do.

How serious is the P0454 code?

Since drivers will not know there is an issue with the vehicle based on the way it performs, this is not generally a very serious problem. The biggest problem when this code appears is that the Check Engine light comes on and stays on. However, this does not mean that you should ignore this type of problem. If the mechanic finds the code, it’s always best to have them repair it as soon as possible.

What repairs can fix the P0454 code?

Once the mechanic has started to narrow down the location of the problem, they can start to make repairs. The following are some of the repairs that can be made to help fix the P0454 code:

Additional comments for consideration regarding the P0454 code

Even though you might not notice any difference in the performance of the vehicle, you never want to let a code go unattended for long. Take the time to bring the vehicle to a mechanic who can inspect it and who can determine the problem. It’s always better to fix even the minor problems as soon as you can so you don’t have even more problems to contend with in the future.

Need help with a P0454 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

trouble codes
Check Engine Light
P0454

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P0454 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.5/5

Number of Reviews

4,150

Rating Summary
3,799
173
45
26
107
3,799
173
45
26
107
Joseph

Joseph

30 years of experience
432 reviews
Joseph
30 years of experience
Great mechanic, very knowledgeable and friendly. He explains things well and will ne sure to take of the problem however he can.
2003 LEXUS ES300 - CHECK ENGINE LIGHT IS ON - DALLAS, TEXAS
Patrick

Patrick

30 years of experience
865 reviews
Patrick
30 years of experience
Friendly and on time
2004 TOYOTA RAV4 - CHECK ENGINE LIGHT IS ON - KYLE, TEXAS
Alex

Alex

19 years of experience
16 reviews
Alex
19 years of experience
Alex was on time and willing to do a good job. I appreciate his time and Expertise. Thanks Alex!
2012 VOLKSWAGEN JETTA - CHECK ENGINE LIGHT IS ON - ONTARIO, CALIFORNIA
Ben

Ben

38 years of experience
883 reviews
Ben
38 years of experience
Ben is really knowledgable about car diqgnostic. He's really professional, he knows what to do about the car, and very friendly.. i like to have him again anytime i have a problem with my car..
2002 TOYOTA CAMRY - CHECK ENGINE LIGHT IS ON INSPECTION - HUMBLE, TEXAS

More related articles

The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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.

Related questions

Q: P0420 - CATALYST B1 DETERIORATION

Hello - it is possible the 2 problems are related, but likely only over a long period of time. The P0420 code is a "low efficiency catalytic converter" for Bank2 - which include cylinder 1. And yes, that warning is...

Q: Why would I still have a check engine light after my camshaft and crankshaft sensors were replaced 2008 Kia Sedona

If you are continuing to get the same codes after these sensors were replaced then you more than likely have a worn out timing belt. When the belt is worn then the sensors will not read correctly. If you want...

Q: Misfires, Rough idle, Engine Check light, and Engine not starting

Hello there, many different faults can cause your 2002 Chevrolet S10 to have starting issues, misfires and lack of power. The first step would be to scan the truck to determine what codes are present, this will determine what route...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com