Have you been experiencing rough idling or difficulty starting your car?
These could be signs of a bad fuel tank pressure sensor.
The fuel tank pressure sensor is critical to monitoring fuel vapor and managing emissions. When it fails, replacement is often the only fix.
Let’s explore the fuel tank pressure sensor replacement cost in detail and the critical warning signs to watch out for so you can avoid costly repairs.
This Article Contains:
- How Much Does a Fuel Tank Pressure Sensor Replacement Cost?
- Is it Worth Replacing the Fuel Tank Pressure Sensor?
- Signs You Need a Fuel Tank Pressure Sensor Replacement
- How Long Does a Fuel Tank Pressure Sensor Last?
- Can You Drive with a Faulty Fuel Tank Pressure Sensor?
- Can You Replace a Faulty Fuel Tank Pressure Sensor Yourself?
- What’s the Difference Between a Fuel Tank Pressure Sensor and a Fuel Rail Pressure Sensor?
How Much Does a Fuel Tank Pressure Sensor Replacement Cost?
The cost of replacing a bad fuel pressure sensor can vary depending on several factors. Let’s examine what you can expect to pay.
A. Range
The average cost for a fuel pressure sensor replacement is between $265 and $380. This includes:
- Parts: $125 to $200
- Labor: $140 to $180
B. Factors Affecting Cost
A variety of factors can influence your average cost. Here’s a closer look at them:
- Vehicle make and model: Higher-end vehicles, such as BMWs or Mercedes Benz, often have more expensive parts, which can increase the overall cost of replacement.
- Location of the sensor: Depending on the vehicle, the fuel tank pressure (FTP) sensor can be found in different places. It’s generally located on top or inside of the fuel tank but can also be in one of several locations:
- Along the EVAP line
- Near the fuel filler neck
- Attached to the charcoal canister
Of these locations, the charcoal canister tends to be the most difficult to access, which can increase labor costs.
- Part quality: Original Equipment Manufacturer (OEM) parts are often more pricey than aftermarket alternatives but are made specifically for your vehicle.
- Diagnostic fees: If the issue requires testing, the auto repair shop may charge an extra diagnostic fee, typically around $50 to $100. This helps pinpoint the exact car problem and check if other related parts function correctly.
- Additional repairs: If the mechanic finds other damaged components, repairing or replacing them will increase your overall cost. For example, fuel pump repairs can cost up to $1,300, while fuel line repairs range from $220 to $530.
Is it Worth Replacing the Fuel Tank Pressure Sensor?
Yes, it’s definitely worth replacing a faulty fuel tank pressure sensor, as it’s crucial to ensuring your vehicle’s EVAP system runs smoothly.
Ignoring it can lead to issues like stalling, rough idling, and more. A faulty sensor can also cause problems with components like the fuel injectors and exhaust manifold as well as result in severe engine damage.
If you notice any signs of a faulty fuel tank pressure sensor, it’s best to book a car repair with a reputable auto repair shop.
Signs You Need a Fuel Tank Pressure Sensor Replacement
Watch out for these telltale symptoms that your fuel tank pressure sensor might be failing:
- Illuminated check engine light: Your check engine light activating is often one of the first signs of a failing fuel tank pressure sensor. This happens when the sensor sends incorrect pressure readings to the electronic control module (ECM). Depending on your vehicle, this can trigger diagnostic trouble codes like P0452, P0453, or P0454.
- Rough idling: The ECM uses the fuel tank pressure sensor to regulate the air-fuel mixture and ignition timing. A malfunctioning sensor can send incorrect signals, leading to improper combustion and often resulting in rough idling.
- Difficulty starting or frequent stalling: If the sensor provides incorrect data, the combustion chamber may receive a lean air-fuel mixture, making it harder for the engine to ignite gasoline properly. Your vehicle may also stall more frequently.
- Poor acceleration: A bad FTP sensor can cause poor acceleration by disrupting the air-fuel mixture in the combustion chamber. This not only reduces fuel efficiency but can also impact acceleration, causing hesitation or a sluggish response when pressing the accelerator. Left unchecked, it can damage critical components, like the catalytic converter or fuel injectors, leading to more expensive repairs.
- Emission issues: The FTP sensor is a vital part of the EVAP system, so if it malfunctions, it can fail to detect vapor leaks. The vehicle will likely fail an emissions test since the EVAP system captures and controls fuel vapors.
How Long Does a Fuel Tank Pressure Sensor Last?
The fuel tank pressure sensor has no specific lifespan and can often last the vehicle’s lifetime.
However, it can fail prematurely due to several factors, including:
- Damage caused by physical impact or corrosion
- Electrical issues
- Excessive engine vibrations
- Overfilling the fuel tank
- Environmental conditions
Can You Drive with a Faulty Fuel Tank Pressure Sensor?
While you can technically drive with a bad FTP sensor, it’s not recommended. A malfunctioning sensor can disrupt the emissions control system and create engine performance issues.
To keep your car running smoothly, it’s best to have it checked by a qualified mechanic.
Can You Replace a Faulty Fuel Tank Pressure Sensor Yourself?
Ideally, you shouldn’t. Replacing a fuel tank pressure sensor is best left to a professional due to its complexity and potential fire hazards.
The sensor is often located in or on top of the fuel tank, making it difficult to access. Replacing it requires dealing with the fuel system, which may involve draining the fuel tank, removing the fuel pump assembly, and disconnecting the fuel lines. These tasks generally require specialized tools, such as a fuel tank support jack and a fuel line disconnect tool.
What’s the Difference Between a Fuel Tank Pressure Sensor and a Fuel Rail Pressure Sensor?
The fuel tank pressure sensor monitors the pressure inside the fuel tank or EVAP system. It sends data to the ECM, which adjusts the air-fuel mixture accordingly, helping to control fuel emissions.
On the other hand, the fuel rail pressure sensor sits on the fuel rail, a long metal tube that supplies fuel to the injectors. It measures the pressure in the rail to ensure it’s within the right range for smooth engine performance, proper fuel injection, and efficient combustion.
Get Hassle-Free FTP Sensor Replacement with AutoNation Mobile Service
A faulty fuel tank pressure sensor can lead to various issues that impact your vehicle’s performance and result in expensive car repairs.
Not sure if your fuel tank pressure sensor needs replacing?
Let AutoNation Mobile Service help!
We offer transparent, upfront pricing and an easy online booking system. Our expert mechanics will come to you, diagnose the issue, and replace the faulty sensor right from your driveway.
What’s more?
All our repairs come with a 12-month, 12,000-mile warranty, so whether you’re dealing with a bad starter motor, torque converter, or ignition switch — we’ve got you covered.