2002 Honda Civic Fuel Pump Relay: The Complete Guide to Location, Testing, and Replacement

The bottom line: The fuel pump relay on a 2002 Honda Civic is located under the dashboard on the driver's side, inside the under-dash fuse/relay box near the brake pedal. It is also commonly found behind the glove box on some trim levels. This relay, known as the PGM-FI Main Relay, controls power to the fuel pump. When it fails, your engine will crank but won't start. If you are experiencing a no-start condition, intermittent stalling, or hesitation during acceleration, the fuel pump relay should be one of the first components you check.

Understanding the Fuel Pump Relay in Your 2002 Civic

The fuel pump relay is a small but critical component in your Civic's electrical system. It acts as a switch that controls the power supply to the fuel pump, ensuring the pump only runs when the engine needs fuel. Think of it like a gatekeeper. The Engine Control Unit (ECU) sends a signal to the relay when it detects that the engine is cranking or running. This signal activates the relay, closing the circuit and allowing battery voltage to flow to the fuel pump. The fuel pump then starts pumping fuel from the gas tank to the engine.

Honda refers to this relay as the PGM-FI Main Relay (Programmed Fuel Injection Main Relay). It actually contains two separate relays inside one housing. The first relay powers the engine control unit and injectors when you turn the key. The second relay activates the fuel pump. This is why some mechanics call it the "main relay" rather than just the fuel pump relay.

Why not wire the fuel pump directly to the battery? A direct connection would mean the fuel pump runs constantly, even when the engine is off. This could lead to fuel leaks, increased fire risk, and a drained battery. The relay provides a safe and controlled way to power the fuel pump only when necessary.

Where to Find the Fuel Pump Relay

Primary Location: Under the Dashboard

The main fuel pump relay on most 2002 Honda Civic models is located under the driver's side dashboard. Here is how to access it:

  1. Get into position – Sit in the driver's seat and look under the dashboard, near the brake pedal area. You may need to bend down or use a flashlight.
  2. Remove the panel – There is a plastic cover or panel under the dash that needs to be removed. This is usually held in place by clips or a few screws.
  3. Locate the fuse/relay box – The under-dash fuse and relay box is mounted on the driver's side, typically near the kick panel.
  4. Find the correct relay – Inside this box, look for a relay labeled as "PGM-FI Main Relay" or "Fuel Pump Relay." The fuse box cover usually has a diagram showing the exact position.

The 2002 Civic uses two PGM-FI relays in the interior fuse/relay box:

  • PGM-FI Main Relay No. 1 – Controls the fuel injectors and is located at the top of the interior fuse/relay box.
  • PGM-FI Main Relay No. 2 (Fuel Pump Relay) – Controls the fuel pump and is located at the lower part of the interior fuse/relay box.

Alternative Location: Behind the Glove Box

Some 2002 Civic models, particularly certain trim levels, have the fuel pump relay located behind the glove box. If you cannot find it under the driver's dash, check this area:

  1. Open the glove box and support it with your knee.
  2. Remove the glove box stoppers on either side using a flat-head screwdriver.
  3. Allow the glove box to pivot downward slowly.
  4. Look through the cavity – you will see two relays side by side.
  5. PGM-FI relay No. 2 (the one on the right) acts as the fuel pump relay.

Under-Hood Location

Some sources also mention a fuel pump relay in the under-hood fuse box, which is located on the driver's side of the engine bay near the battery. This fuse box is also called the "engine compartment fuse box" or "power distribution center." [5] However, the primary fuel pump relay on the 2002 Civic is typically the interior one.

Confirming You Have the Right Relay

Before you start pulling parts, take these steps to make sure you are working with the correct relay:

  • Check the fuse box diagram – The cover of the interior fuse box has a diagram showing the location of each component. Look for labels like "PGM-FI Main," "Fuel Pump," or "FP Relay."
  • Consult your owner's manual – The manual provides the most accurate fuse box diagram for your specific trim level (DX, LX, EX, Si, or GX).
  • Look at the relay itself – The relay is a small, cube-shaped component with four or five terminals. It is usually black or dark gray.

Symptoms of a Failing Fuel Pump Relay

Knowing the warning signs can save you from being stranded. Here are the most common symptoms:

1. No start condition – The engine cranks over but never fires up. This is the most obvious symptom.

2. Intermittent stalling – The engine starts and runs fine, then suddenly dies without warning. This can be dangerous if it happens while driving.

3. No fuel pump priming sound – When you turn the key to the "ON" position, you should hear a brief buzzing sound from the fuel pump. If you do not hear this, the relay could be the problem.

4. Engine hesitation during acceleration – The car feels sluggish or hesitant when you press the gas pedal, as if it is not getting enough fuel.

5. Engine surging – The RPMs fluctuate erratically even when you are holding the accelerator steady.

6. Clicking sound from the relay – Sometimes, you might hear a clicking sound coming from the relay when you turn the ignition key. This indicates the relay is attempting to engage but failing.

It is important to note that these symptoms can also be caused by other issues, such as a bad fuel pump, a clogged fuel filter, or a faulty crankshaft position sensor. However, the fuel pump relay is a relatively inexpensive and easy component to check first.

How to Test the Fuel Pump Relay

Visual Inspection

Start by inspecting the relay for any visible signs of damage. Check for corrosion or damage on the relay terminals. Corroded or damaged relay terminals can disrupt the electrical connection, leading to fuel pump failure. Look for any cracks, melting, or burning marks on the relay housing.

Swapping Method

One of the easiest ways to test the relay is to swap it with a similar relay in the fuse box. If the fuel pump engages after swapping relays, the original relay is likely faulty and needs replacement. Make sure the relay you swap with has the same part number and terminal configuration.

Multimeter Testing

You can test the relay using a multimeter to check for continuity across the terminals. Here is a basic approach:

  1. Remove the relay from its socket.
  2. Set your multimeter to the resistance (ohms) setting.
  3. Check for continuity between the coil terminals. You should see a specific resistance value (typically between 50-120 ohms).
  4. Apply 12V power to the coil terminals using jumper wires. You should hear a click, and the switch terminals should show continuity.
  5. If the relay does not click or shows no continuity, it is likely faulty.

How to Replace the Fuel Pump Relay

Replacing the fuel pump relay on a 2002 Honda Civic is a straightforward DIY job. Here are the steps:

Tools You Will Need

  • Flat-head screwdriver
  • Replacement PGM-FI main relay No. 2 (fuel pump relay)

Replacement Steps

If the relay is behind the glove box:

  1. Open the glove box and support it with your knee.
  2. Find the glove box stoppers on either side and pry them toward the glove box with a flat-head screwdriver to remove them.
  3. Allow the glove box to pivot downward slowly and hang by its lower hinges.
  4. Look through the cavity and find the two relays side by side.
  5. Grab relay No. 2 (the one on the right) and pull it outward with a slight wiggling motion to remove it.
  6. Line up the prongs on the new relay with the slots in its receptacle and press it into place.
  7. Lift the glove box until the holes for the stoppers are inside the cavity.
  8. Insert the glove box stoppers into their holes and press them until they snap into place.

If the relay is under the driver's dash:

  1. Remove the plastic cover panel under the dashboard.
  2. Locate the under-dash fuse/relay box.
  3. Identify the PGM-FI main relay No. 2 (fuel pump relay).
  4. Pull the relay straight out of its socket.
  5. Insert the new relay and press it firmly into place.
  6. Reinstall the cover panel.

Important Safety Precautions

Before working on any electrical components, always disconnect the negative terminal of your car's battery. This will prevent accidental shorts and potential damage to the electrical system. Always work with the ignition off to avoid short circuits, and use insulated tools to prevent accidental grounding.

Understanding the Wiring Diagram

The fuel pump relay circuit in the 2002 Honda Civic is relatively straightforward. The relay has five pins: two for power input, two for power output, and one for ground. A 12V supply from the battery or ignition switch feeds the relay. The ECU sends a control signal to activate the relay when the ignition is turned on. When activated, the relay allows current to flow from the power source to the fuel pump.

The official Honda service manual for the 2002-2003 Civic provides specific troubleshooting steps for the fuel pump circuit. If you suspect a problem with the fuel pump, you can check that the fuel pump actually runs. When it is on, you will hear some noise if you listen to the fuel fill port with the fuel fill cap removed. The fuel pump should run for 2 seconds when the ignition switch is first turned on.

Cost Considerations

When it comes to replacing the fuel pump relay, the part itself is relatively inexpensive. The cost of a new OEM relay can range from $20 to $50, while aftermarket options are often cheaper. However, if you are also dealing with a failed fuel pump, the costs can add up. For the 2002 Civic, the fuel pump is located inside the gas tank. You can access the top of it by removing the rear seat bottom cushion and then taking off a small metal service cover found underneath.

Fuel pump replacement prices can vary significantly:

  • New OEM (Dealer): $450 - $900 (part only)
  • New Aftermarket: $75 - $450 (part only)
  • Shop Labor: $210 - $310

Why You Should Choose KEMSO Fuel Pumps for Your 2002 Honda Civic

When it comes time to replace the fuel pump on your 2002 Honda Civic, do not waste your time with a cheap no-name pump or a factory replacement that will fail again. Invest in a quality aftermarket pump that comes with a lifetime warranty. This is the only way to ensure that your vehicle stays on the road for years to come.

KEMSO brand fuel pumps are designed as high-performance OEM replacement units, meaning they match or exceed the specifications of your original factory pump. Whether you drive a Honda Civic, a Ford F-250, or any other vehicle on American roads, KEMSO has a fuel pump that fits your exact needs. Every pump is built to deliver the precise flow rate and pressure required by your engine, ensuring smooth performance and reliable fuel delivery under all driving conditions.

What truly sets KEMSO apart is the lifetime warranty that comes with every fuel pump. This warranty reflects KEMSO's confidence in their product quality and provides you with long-term protection. If your KEMSO fuel pump ever fails, you can get a replacement at no additional cost. This kind of guarantee is rare in the aftermarket parts industry and gives you complete peace of mind.

KEMSO is committed to the American market, with operations based in Houston, Texas. Their products are designed for real-world driving conditions across the United States, from city streets to highway commutes to off-road adventures. By choosing KEMSO, you are investing in a fuel pump that will keep your engine running reliably for years to come.

For the best selection of fuel pumps for your 2002 Honda Civic, visit KEMSO Racing at https://www.kemsoracing.com/. Their online store makes it easy to find the right pump for your vehicle, and their customer support team can help with any questions about compatibility or installation. The lifetime warranty gives you the confidence that your new fuel pump will keep your Honda Civic running strong for years to come.

Final Thoughts

The fuel pump relay is a critical component on your 2002 Honda Civic. When it fails, the vehicle becomes unreliable and unsafe to drive. The good news is that diagnosis and replacement are straightforward and affordable. The key to success is proper diagnosis, careful preparation, and attention to detail during installation. Take your time, follow the steps outlined in this guide, and do not cut corners on safety procedures.

Remember that the fuel pump relay is the heart of your engine's fuel delivery system. A properly functioning relay ensures your fuel pump receives the correct power for optimal fuel delivery. Neglecting a failing relay can lead to more expensive problems, including being stranded on the side of the road.

The 2002 Honda Civic is known for its durability and reliability, and a properly maintained fuel system is essential to realizing that potential. For the best combination of quality, performance, and value, choose KEMSO fuel pumps for your Civic. With their lifetime warranty and OEM-grade construction, KEMSO pumps provide the reliability you need to keep your vehicle on the road for years to come.

Visit https://www.kemsoracing.com/ to explore their full line of fuel pumps and take advantage of their industry-leading warranty.


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