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2003 Honda Accord Problems

RepairPal has identified the most common problems with the 2003 Honda Accord based on complaints from actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.

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Known Problems

Plugged moon roof drains can cause a water leak inside the car. The water will usually leak onto the driver's or passenger's head when the car turns a corner.

The computer can misinterpret a low battery voltage and can cause a false Check Engine (MIL) light to come on. Updating the PCM can correct this issue.

The engine may develop and oil leak due to a porous engine block casting. The repair procedure is dependent on where the leak is located. Honda has released a service bulletin covering model years 1998-2003. Honda may offer assistance with repairs, determined on a case by case basis.

Occasionally, the anti-lock brake (ABS) warning light may illuminate. This could be due to a faulty rear wheel speed sensor. The sensor design has been updated and revised parts are available to correct this problem.

 

Leaking gaskets around the tail lights can allow water entry into the tail light assembly. New gaskets should fix this concern.

Issues with the air fuel sensor (oxygen sensor) can set a Check Engine Light.  A failed sensor will need to be replaced for this repair.

 

The 1997-2017 Honda Accord May have problems with the EVAP canister vent solenoid. It stops responding to commands to open and close, and the following occurs:

  • Illumination of the check engine light
  • OBD trouble code P1457 is stored
  • Engine takes longer than usual to start
  • Fuel mileage decreases noticeably
  • The valve is located on the charcoal canister, and is meant to open and close upon command. It fails due to corrosion breaking one of two internal seals, which allows air to escape the system, signaling the OBD trouble code P1457.

    Correcting the problem can be done by replacing the vent valve, or, in some cases, cleaning and resealing the vent valve has been successful. You can get an estimate for this repair here.

    A worn, missing, or loose gas cap can cause the same issues.

    Excessive oil consumption can cause a low oil level condition, which can result in illumination of the Check Engine Light.

    A faulty Electric Load Detector (ELD) can cause the head lights to dim and/or illuminate the Check Engine Light. A failed ELD will require replacement.

    If the engine is knocking or pinging when accelerating, the PCM may need updated software.

    The PCM can misinterpret misfire data and set a false Check Engine (MIL) light requiring a PCM update to repair.

    The Honda Accord may have issues with the idle air control system, causing:

    The idle air bypass system is made up of vacuum lines, an idle air control valve (IACV), the throttle body, and intake manifold, and allows enough air into the engine to idle when the throttle body is closed. The OBD trouble code P0505 refers you to this system to inspect for failures.

    The most likely cause is a dirty or failed IACV, but vacuum lines, intake manifold gasket, throttle body gasket, and IACV gasket should be inspected.

    In all cases involving the IACV, the throttle body ports should be cleaned prior to installing the IACV onto the throttle body.

     

    The 2013-2012 Honda Accord has brake caliper issues, which are known for causing vibration and grinding noises at all times.

    The brake rotor is a disk that sits between two brake pads. The brake pads are squeezed against the disk by what is called a brake caliper. When that caliper gets stuck, the brake pads are permanently pressed against the rotor causing:

  • Vibration in brake pedal
  • Vibration on steering wheel
  • Illumination of the ABS or brake warning light
  • Grinding noise from one corner of the vehicle
  • Vehicle pulls to one side of the road
  • Braking requires more pressure on the brake pedal
  • The repair for a seized brake caliper, the brake pads, brake rotor, and brake caliper must be replaced or vibration will remain after the new caliper is installed. Changing the brake fluid and flushing the brake system according to manufacturer specified intervals can help improve longevity of the brake caliper.