Symptoms of a Bad Fuel Tank Pressure Sensor

Symptoms of a Bad Fuel Tank Pressure Sensor

Well in the article we will discuss the symptoms of a bad fuel tank pressure sensor. Understanding these warning signals can help you see possible issues before they become serious and take the necessary action to solve them, saving future damage and expensive repairs. A crucial part of a vehicle’s evaporative emissions control system is the fuel tank pressure sensor. It keeps track of pressure variations in the fuel tank to make sure the system runs effectively and complies with pollution standards. The gasoline tank pressure sensor, however, can have problems over time, just like any other sensor, resulting in a variety of symptoms that might impact the performance and fuel efficiency of the car.

Symptoms of a Bad Fuel Tank Pressure Sensor

so let’s begin!


Symptoms of a bad fuel tank pressure sensor

Below shows the possible symptoms of a bad fuel pressure sensor;

Difficulty Starting the Engine

Engine starting issues may result from a damaged fuel tank pressure sensor. Long cranking durations or many tries to start the engine are both possible. This can be annoying and point to difficulty with the sensor’s capacity to deliver precise pressure measurements.

Check Engine Light

The check engine light on your car’s dashboard turning on is one of the most obvious signs of a faulty fuel tank pressure sensor. The sensor is intended to detect changes in the pressure in the gasoline tank, and when it malfunctions or fails, it activates the check engine light to warn you of a potential problem.

Erratic or Inconsistent Fuel Gauge Readings

The fuel gauge on your dashboard depends on the gasoline tank pressure sensor to deliver reliable data. Fuel level measurements may be irregular or inconsistent when the sensor is broken. Unexpected changes in the fuel gauge needle might give you a false impression of how much petrol is still in your tank.

Poor Fuel Efficiency

Reduced fuel efficiency can result from a malfunctioning fuel tank pressure sensor, which can interfere with the fuel system’s performance. Your car can seem to be using more gasoline than normal, necessitating regular refills. Over time, this condition may significantly affect your bank account.

Failed Emissions Tests

The evaporative emissions management system, which aids in managing and reducing hazardous gasoline vapors, is not complete without the fuel tank pressure sensor. Your car may fail emissions tests as a consequence of higher emissions brought on by a damaged sensor. Legal repercussions may result from this, and repairs could be necessary to meet the necessary emissions levels.

Stalling or Hesitation

Inconsistent stalling or hesitancy when driving might be brought on by a faulty fuel tank pressure sensor. You could suffer a lack of power, stuttering, or even a complete engine stall. In order to avoid any potential road safety risks, these symptoms can be quite concerning and need rapid care.

It is advised to have your car evaluated by a trained technician if you experience any of these symptoms. They are able to correctly evaluate the problem and decide whether the fuel tank pressure sensor is to blame. Appropriate functioning can be restored, fuel efficiency can be increased, and emissions laws may be met with prompt repairs or sensor replacements.

Keep in mind that by being aware of the signs of a faulty gasoline tank pressure sensor, you’ll be better equipped to take preventative action and deal with the problem quickly. You may preserve your vehicle’s effectiveness, efficiency, and eco-friendliness by doing this.

Preventive Measures for Maintaining a Healthy Fuel Tank Pressure Sensor:

It’s crucial to take preventive action to guarantee the effective operation of your gasoline tank pressure sensor and ward off any problems. Here are some steps you may take to keep a sensor in good shape:

Use High-Quality Fuel

Utilizing top-notch gasoline can aid in preventing the buildup of impurities and debris that could impair the sensor’s effectiveness. Choose trustworthy gasoline suppliers instead of fueling up at gas stations with dubious fuel.

Regular Fuel System Maintenance

Observe the fuel system maintenance plan advised by the manufacturer. This entails regular inspections, the replacement of the fuel filter, and the cleaning of the fuel system. In order to get reliable readings from the sensor, proper maintenance keeps blockages at bay and makes sure the fuel is pure.

Avoid Overfilling the Fuel Tank

If the gasoline tank is overfilled, fuel may leak into the evaporative emissions system, potentially harming the sensor and other parts. To reduce needless pressure on the sensor, abide by the fuel tank’s capacity recommendations and refrain from overfilling.

Promptly Address Check Engine Light

Get your car examined by a trained professional as soon as possible if the check engine light comes on in your dashboard. Ignoring the warning light or delaying repairs might result in more harm, including possibly problematic fuel tank pressure sensors.

Keep the Fuel Cap Sealed Properly

After refilling, make sure the fuel cap is properly closed. The pressure in the gasoline tank may fluctuate due to a loose or broken fuel cap, which might alter the sensor’s results. To maintain a proper seal, replace a gasoline cap that is broken or worn out.

Avoid Rough Driving Conditions

The general health of your vehicle’s sensors, particularly the gasoline tank pressure sensor, might be impacted by excessive vibration and severe driving conditions. Avoid severe driving techniques like sudden braking and acceleration to save unneeded stress on the sensor and other parts.

Regular System Inspections

As part of your normal car maintenance, check the fuel system. Maintain a regular inspection for any indicators of degradation, such as fuel leaks or broken parts. Prompt action can stop additional damage and guarantee the gasoline tank pressure sensor is operating properly.

By adhering to these precautions, you may lessen the risk of sensor failure or malfunction while maintaining a healthy fuel tank pressure sensor. Maintaining the health of your fuel system and sensor requires routine maintenance, careful fuelling techniques, and rapid problem-solving.


In conclusion, recognizing the symptoms of a bad fuel tank pressure sensor is vital for maintaining the proper functioning of the vehicle’s evaporative emissions system. This tutorial has highlighted common signs that can point to fuel tank pressure sensor issues, such as warning lights, poor fuel economy, or difficulty starting the engine. For proper emission control, fuel economy, and overall vehicle performance, it’s important to recognize and treat these symptoms right away. To maintain your vehicle’s operation and environmental compliance, the fuel tank pressure sensor needs to be inspected and maintained on a regular basis.

Related Article


What happens when the fuel tank pressure sensor goes bad?

A damaged gasoline tank pressure sensor gradually reduces fuel economy, makes it difficult to start the car and/or causes it to stall, and finally prevents the car from starting.

What does a fuel tank pressure sensor do?

The gasoline tank pressure sensor, which is a component of the fuel pump system, is installed either within or on top of the tank. It monitors fuel system pressure to find evaporative leaks, including a malfunctioning or loose gas cap, as part of the evaporative emissions system (often referred to as “EVAP”).

How do you check a fuel tank pressure sensor?

Turn the key while the engine is off and plug in the sensor. Then, using a fully working scan tool, verify the FTP sensor voltage to ensure that it is reading correctly at atmospheric pressure. If a scan tool is not available, back probe the signal wire and read the sensor output voltage using a multimeter.

Will a car run with a bad fuel pressure sensor?

A damaged fuel rail sensor might give the computer an incorrect signal, which could make it difficult for the engine to start. The engine may start a few cranks later than usual, or in more extreme circumstances, it may not start at all.

What happens when a pressure sensor fails?

Depending on the kind of system, considerable damage to the equipment and surroundings may result if a pressure sensor malfunctions, which might bring down the entire control system and render the equipment or system useless.

What sensors affect the fuel pump?

For instance, the CKP sensor signal is essential because it instructs the ECM to turn on the fuel pump and injectors. Some engines won’t function in a default mode with the camshaft position (CMP) sensor unplugged, hence it might be regarded as a crucial sensor. The CMP sensor times the fuel injectors through the ECM.

That’s all for this article where we discussed the symptoms of a Bad Fuel Tank Pressure Sensor and its preventive measures. Hope it was helpful. if so, kindly share. Thanks fir reading.