Hyundai Ioniq: Fuel Delivery System / Fuel Pressure Sensor (FPS). Repair procedures
1. | Turn the ignition switch OFF and disconnect the battery negative (-) cable. |
2. | Remove the rear seat cushion. (Refer to Body - "Rear Seat Assembly") |
3. | Remove the fuel pump service cover (A). 
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| When reinstalling a protective cover for a fuel pump, remove the existing butyl tape and apply a new one. |
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| Before assembling the protective cover, ensure that the temperature of the butyl is about 30°C using a hair dryer or a heat gun. |

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| When installing the protective cover for the fuel pump, pay attention to the installation direction of the grommet and the protective cover. |
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| The arrow (A) should be in the forward direction of the car. |
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| Align the bulging part of the vehicle body (B) with the hole of the protective cover. |
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| Align the bulging part of the grommet (C) with the bulging part of the protective cover. |

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4. | Disconnect the fuel pressure sensor connector (B). 
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5. | Remove the fuel pressure sensor fixing pin (A). |
6. | Remov ethe fuel pressure sensor (B) from the fuel pump. 
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1. | Install in the reverse order of removal. |
Removal
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In case of removing the high pressure fuel pump, high pressure fuel pipe, delivery pipe, and injector, there may be injury caused by leakage of the high pressure fuel...
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