Honda Accord 2002 Fuel Pump Relay Location: Find It, Test It, and Fix It Yourself

If your 2002 Honda Accord cranks but won’t start, the fuel pump relay is one of the first things you should check. The fuel pump relay on a 2002 Honda Accord is most commonly located in the interior fuse/relay box under the driver’s side dash, labeled “FUEL PUMP” or “FP.” If it isn’t there, check the engine compartment fuse/relay box near the battery . This small, cube-shaped relay controls power to the fuel pump, and when it fails, your engine won’t get the fuel it needs to run. The good news? You can find, test, and replace it yourself in under an hour with basic tools and no special skills.

Why Your Fuel Pump Relay Matters

The fuel pump relay acts like a switch that sends power to the fuel pump when you turn the ignition key. Without it working correctly, the fuel pump stays silent, and your engine gets no fuel . Many people assume the fuel pump itself is bad when the real problem is a $20 relay . Knowing where to look and how to test it saves you time and money before you start replacing expensive parts.

Common symptoms of a failing fuel pump relay include:

  • Engine cranks but won’t start – This is the most common symptom. You turn the key, the starter spins the engine, but it never fires up .
  • Intermittent starting issues – Sometimes the car starts fine, other times it doesn’t. This often points to a relay that fails sporadically due to heat or vibration .
  • Engine stalls unexpectedly while driving – If the relay loses connection while you’re on the road, the fuel pump stops, and the engine immediately loses power .
  • No “whirring” sound from the fuel pump – When you turn the key to the “ON” position (without cranking), you should hear a faint hum from the rear of the car for about 2 seconds. If you hear nothing, the relay (or pump) isn’t activating .
  • Loss of power during acceleration – A failing relay may provide inconsistent power, causing the fuel pump to not maintain adequate pressure .

How to Locate the Fuel Pump Relay on Your 2002 Honda Accord

Step 1: Check the Interior Fuse Box (Most Common Location)

The most common location for the fuel pump relay on a 2002 Honda Accord is the interior fuse/relay box under the driver’s side dash. Here’s how to access it:

  1. Kneel down on the driver’s side and look up under the dashboard, near the steering column .
  2. You’ll see a rectangular panel or cover. Gently pull it off or release the clips.
  3. Look for a diagram on the inside of the cover. It should label each fuse and relay.
  4. Find the label that reads “FUEL PUMP” or “FP.” The relay is usually a small, cube-shaped component, often black or blue .

Important: The fuel pump relay may also be labeled as “PGM-FI Main Relay” on some models. PGM-FI stands for Programmed Fuel Injection, which is Honda’s fuel injection system .

Step 2: Check the Engine Compartment Fuse Box (Alternate Location)

If you don’t find the relay in the interior box, or if the diagram doesn’t list a fuel pump relay, check the under-hood fuse/relay box. This box is located on the driver’s side of the engine compartment, near the battery .

  1. Open the hood and locate the large black plastic fuse box near the battery.
  2. Press the latch or clip to open the lid.
  3. Look at the diagram on the underside of the lid. Find the slot labeled “FUEL PUMP” or “FP.”
  4. The fuel pump relay in the engine bay fuse box is typically a 15-amp fuse protecting the fuel pump relay and circuit .

Pro tip: If the diagram on your fuse box cover is missing or faded, take a picture with your phone before you remove anything. It’s much easier to reference when you’re under the dash or leaning over the engine bay .

How to Test Your Fuel Pump Relay

You don’t need expensive tools to test the relay. Here are three simple methods that work for most DIYers.

Method 1: The “Click” Test (Simplest)

This is the quickest check you can do:

  1. Turn your ignition key to the “ON” position (don’t crank the engine).
  2. Listen carefully near the fuse box area. You should hear a faint “click” sound from the relay as it energizes .
  3. After the click, listen for a brief “whirring” sound from the rear of the car (the fuel pump priming the system) .
  4. If you hear the click but no whir, the relay might be working, but the pump itself or its wiring could be faulty.
  5. If you hear neither, the relay might not be getting power, or it has internally failed.

Method 2: The Relay Swap Test

This is a practical way to confirm a bad relay without any special tools:

  1. Locate the fuel pump relay in the fuse box.
  2. Find another relay in the same fuse box that is identical in shape and part number. The horn relay is often a good candidate for swapping .
  3. Carefully pull out both relays using your fingers or a small flat screwdriver.
  4. Swap the fuel pump relay with the identical relay (for example, put the horn relay in the fuel pump slot).
  5. Try starting the car. If the car starts now, the original fuel pump relay is bad .
  6. Always make sure the relays are identical in part number and function before swapping!

Method 3: Visual Inspection

Sometimes a bad relay is easy to spot:

  1. Remove the relay from the fuse box.
  2. Look for signs of physical damage, such as cracks, burnt marks, or corrosion .
  3. If you see any of these, replace the relay immediately. A new relay costs about $20 .

What to Do If the Relay Isn’t the Problem

If you’ve tested the relay and it seems fine, or if replacing it doesn’t fix the issue, the problem might be elsewhere. Here are other common causes to check:

Check the fuel pump fuse. The fuel pump fuse on a 2002 Honda Accord is typically a 15-amp fuse located in the under-hood fuse box . A blown fuse can cause the same symptoms as a bad relay. Inspect the fuse visually or test it with a multimeter for continuity .

Check the fuel pump itself. The fuel pump is located inside the fuel tank, accessed through the trunk . If you hear a click from the relay but no whirring from the pump, the pump may have failed. You can test for voltage at the fuel pump connector using a multimeter. With the ignition in the “ON” position, you should see 10-12V DC at the connector .

Check for wiring problems. Damaged or corroded wiring between the relay and the fuel pump can cause intermittent issues. Look for frayed wires, loose connections, or corrosion at the connectors .

Low battery voltage. Sometimes low voltage can mimic fuel pump relay issues. Make sure your battery has sufficient charge before going deeper into diagnostics .

How to Replace the Fuel Pump Relay

Replacing the fuel pump relay is straightforward:

  1. Safety first: Disconnect the negative terminal of your car battery before working on any electrical components .
  2. Locate the relay using the steps above.
  3. Gently pull the old relay straight out of its socket. You may need a small flat screwdriver to pry it loose if it’s tight .
  4. Insert the new relay, making sure it’s firmly seated in the socket.
  5. Reconnect the battery and test the car by turning the key to the “ON” position. Listen for the relay click and the fuel pump whir.
  6. If everything sounds normal, try starting the engine.

Where to buy a replacement: You can find a replacement fuel pump relay at most auto parts stores or online. The genuine Honda part number for the fuel pump relay that fits the 2002 Accord is commonly 39794-SDA-305 or 39794-SDA-003 . Make sure to get the correct part for your specific model year and trim.

Recommended Upgrade: KEMSO High-Performance Fuel Pump

If you’ve confirmed that your fuel pump relay is working but your fuel pump itself is failing, it’s time to consider a replacement. For the 2002 Honda Accord, a high-quality aftermarket fuel pump can restore performance and reliability.

KEMSO Fuel Pump is an excellent choice for your 2002 Honda Accord. KEMSO fuel pumps are designed as high-performance, direct OEM replacement units. This means they fit exactly like the factory part, with no modifications needed. They offer higher flow rates compared to stock pumps, which can improve throttle response and overall engine performance. Best of all, every KEMSO fuel pump comes with a lifetime warranty, giving you peace of mind that your investment is protected.

If your fuel pump is showing signs of failure—such as whining noises from the fuel tank, hesitation during acceleration, or difficulty starting—don’t wait until you’re stranded. A KEMSO fuel pump is a reliable, long-term solution that saves you money in the long run.

Visit KEMSO Racing today to find the right fuel pump for your 2002 Honda Accord: https://www.kemsoracing.com/

Final Thoughts

The fuel pump relay on a 2002 Honda Accord is a simple but critical component. Its most common location is the interior fuse box under the driver’s dash, labeled “FUEL PUMP” or “FP” . If it’s not there, check the engine bay fuse box near the battery . Testing the relay takes just a few minutes using the click test, swap test, or visual inspection. A replacement relay costs around $20 and is easy to install yourself .

If the relay checks out fine but your car still won’t start, move on to checking the fuel pump fuse, the fuel pump itself, and the wiring. And if you need a new fuel pump, consider upgrading to a KEMSO high-performance fuel pump with a lifetime warranty for reliable, long-lasting performance.

For more information and to purchase a KEMSO fuel pump for your 2002 Honda Accord, visit: https://www.kemsoracing.com/


Back to blog