Replacing Fuel Pressure Sensor In Range Rover Evoque

The fuel pressure sensor in a Range Rover Evoque is responsible for monitoring the pressure in the fuel rail and reporting the reading to the engine control module. If the sensor fails, it needs to be replaced. The cost of replacing a fuel pressure sensor varies depending on the year of the car and the location of the repair, but it typically ranges from $199 to $985. The process of replacing the fuel pressure sensor involves bleeding the fuel pressure, disconnecting the battery, removing the old sensor, installing the new sensor, reconnecting the battery, and road testing the vehicle. It is recommended to have a certified mechanic perform the replacement to ensure it is done correctly and safely.

Average cost of replacement

The average cost for a Land Rover Range Rover Evoque Fuel Pressure Sensor Replacement is between $199 and $266, with parts costing between $143 and $171 and labor between $56 and $95. However, one source states that the average cost is $366.

Prices may vary depending on your location and the year of your Range Rover Evoque. For example, the shop/dealer price for a 2013 Land Rover Range Rover Evoque is $560.04 - $829.70, while for a 2017 model, it is $679.61 - $954.20.

The fuel pressure regulator, which is part of the fuel pump assembly, can also be replaced. The average cost of this replacement is $1241, with parts costing $877 and labor $364.

Symptoms of a faulty sensor

The fuel pressure sensor in a Range Rover Evoque is responsible for monitoring the pressure in the fuel rail and reporting the reading to the engine control module. If the sensor is faulty, the engine control module will not be able to adjust the air to fuel mixture ratio, leading to several issues. Here are some common symptoms of a faulty fuel pressure sensor:

• Check Engine Light: The most common symptom of a faulty fuel pressure sensor is the illumination of the "Check Engine" light on the dashboard. This indicates that the engine control module has detected a problem with the fuel system.
• Poor Fuel Economy: A faulty sensor can lead to increased fuel consumption, resulting in poor fuel economy. The engine will compensate for the faulty sensor, but fuel will be wasted.
• Difficulty Starting the Engine: In some cases, a faulty fuel pressure sensor can cause difficulty in starting the engine. The engine may have trouble starting or experience hard starting.
• Engine Misfire and Poor Performance: A failing fuel pressure sensor can lead to engine misfires, reduced engine performance, and hesitation when accelerating.
• Black Smoke from Exhaust: If the sensor is faulty, it can cause an imbalance in the air-fuel mixture, leading to incomplete combustion and black smoke coming from the exhaust.
• Failed Emissions Test: Due to the improper air-fuel mixture, the vehicle may not pass an emissions test.
• Erratic Engine Behaviour: The engine may run erratically, with sudden changes in speed or RPM.

How fuel pressure sensors work

A fuel rail pressure sensor is responsible for regulating fuel pressure in the fuel rail. The fuel rail is the main pipeline that supplies fuel to each cylinder via high-pressure fuel injectors. It is a critical piece of the fuel system, and the fuel rail pressure sensor controls its activity. The cylinders in an engine require the right amount of fuel at the right time and at optimum pressure. This is governed by the fuel rail pressure sensor, which works alongside the ECU (Engine Control Unit), relaying the correct amount of fuel during the intake stroke.

The fuel rail pressure sensor constantly monitors the fuel pressure in the fuel rail and sends this data to the ECU, which changes fuel pressure and injection timing as required. This improves performance and efficiency while also reducing emissions and the amount of unburnt fuel. The body of the pressure sensor comprises a semiconductor and an integrated electric circuit. When fuel passes through the sensor, it applies a mechanical strain on the semiconductor. According to the piezoresistive effect, this results in a change in the material's electrical resistivity. The change in electrical resistivity is converted to a digital signal by the integrated circuit and relayed to the ECU.

The fuel temperature sensor is a type of electric resistor (called a thermistor) that is sensitive to heat. Changes in the temperature around the sensor cause changes in its electrical resistance. This difference is calculated by the ECU, and the information is used to adjust the air-to-fuel mixture ratio in differing temperature conditions.

If the sensor fails, it can affect fuel delivery, causing issues with the air-fuel ratio and improper combustion. Symptoms of a faulty sensor include a drop in performance, rough idling or running, difficulty starting the car, and a check engine light.

When to get a professional

When the fuel pressure sensor in your Range Rover Evoque goes bad, you will likely see the "Check Engine" light on. This is the most common symptom of a faulty fuel pressure sensor. Other signs include poor fuel economy, hard starting of the engine, engine misfire, and poor performance. If you notice any of these issues, it is recommended to get a diagnostic test done at a repair shop.

While some people with intermediate to advanced DIY skills may be able to tackle the job of replacing the fuel pressure sensor, it is important to note that it requires a diagnostic scan and experience with a multimeter to avoid replacing a sensor that is not faulty. If the fuel tank needs to be removed from the vehicle, it is best to leave the repair to a qualified technician at a trusted repair shop.

Additionally, if you notice any issues with your fuel system, such as a smell of gas in the engine compartment, black smoke coming out of the exhaust, a failed emissions test, or poor mileage, it is important to schedule an inspection with a mechanic. A malfunctioning fuel pressure regulator can lead to a flooded engine, which can be a fire hazard.

In summary, while some aspects of diagnosing and replacing a fuel pressure sensor can be done by experienced DIYers, it is generally recommended to seek the help of a professional, especially if the fuel tank needs to be removed or if there are signs of a malfunctioning fuel pressure regulator.

Location of the fuel pressure sensor

The fuel pressure sensor in a Range Rover Evoque is usually mounted on the fuel pump inside the fuel tank. In some cases, such as in vehicles with diesel engines, the sensor may be located inside the injector pump or fuel filter housing.

To replace the fuel pressure sensor, a technician will first relieve the residual pressure in the fuel system by disabling the fuel pump and cranking the ignition. They will then disconnect the battery and remove the fuel pump assembly from the fuel tank. This often involves removing the back seat and an access cover in the floor of the vehicle. Once the fuel pump assembly is accessible, the technician will unplug the wiring harness connectors, detach the fuel lines, and remove the retaining ring holding the assembly in place. The fuel pressure sensor can then be unplugged and detached from the assembly, and a new sensor can be installed in its place.

It is important to note that replacing the fuel pressure sensor requires dealing with the fuel system, so the electrical system of the vehicle should be disabled to prevent accidental arcing of wires during the repair, which could ignite the open fuel system.

Frequently asked questions