Parts for your 2009 Honda Accord-Egr valve

2009 Honda Accord EGR valve — what’s fitted, what it does, and how to look after it

Based on technical sources, the 2009 Honda Accord may or may not have a separate EGR (Exhaust Gas Recirculation) valve, depending on the engine. The Honda 2008–2012 Accord Service Manual (Helm Inc., Fuel & Emissions, EGR System) and Honda OEM parts catalogues show an electronic EGR valve fitted to V6 models (J35-series engines, e.g., J35Z2/J35Z3), while the 2.4‑litre four‑cylinder (K24Z2/K24Z3) uses i‑VTEC cam timing to achieve internal EGR and has no external EGR valve to service. The under‑bonnet emissions label on four‑cylinder cars also omits EGR hardware. For V6 models, the parts catalog lists an EGR valve assembly (commonly referenced under Emission Control group, valve family 18710‑R70‑xxx), confirming fitment.

For owners of the 2009 Accord V6, the EGR valve is a small workhorse that quietly lowers combustion temperatures by recirculating a measured bit of exhaust gas back into the intake. That helps cut NOx emissions, smooths light‑throttle cruising, and can even help fuel economy around town. It stays shut at idle and under heavy throttle, then meters flow during steady running so the engine breathes a bit of its own exhaust without any dramas.

Over the kilometres, carbon can build up on the valve and in the intake passages. Typical clues include a Check Engine light (often codes like P0401, P0404 or P0490), rough idle, pinging under load, flat spots on take‑off, or higher fuel use. As part of routine servicing on the V6, it’s smart to inspect or clean the EGR valve and passages around the 100,000–150,000 km mark, especially if most driving is short trips.

• Service tips for the V6:
  • Let the engine cool, then unplug the connector, remove the mounting bolts, and lift the valve off the intake.
  • Use a new gasket on refit, avoid dropping debris into open ports.
  • Clean light deposits with sensor‑safe throttle body cleaner, don’t soak the electronics.
  • If the pintle sticks or the position sensor is out of range, replacement is usually the better call.
  • Clear fault codes and perform an idle relearn if the service manual calls for it.

For four‑cylinder 2009 Accords, an external EGR valve isn’t used. Honda’s i‑VTEC with variable cam timing provides “internal EGR” by overlapping valve events, achieving the same emissions benefit without extra hardware to maintain.

Whether it’s a clean of the passages or a full replacement on the V6, sticking to quality parts, fresh gaskets, and the factory procedure keeps the Accord happy under the bonnet and on the road.

Does the 2009 Honda Accord 2.4 have an EGR valve?

No. The 2.4‑litre K24Z engines use cam timing (internal EGR) to reduce NOx, so there’s no separate EGR valve to replace. If a parts site lists one for the 2.4, it’s likely a catalogue mismatch—check the under‑bonnet label and engine code to confirm.

What are common signs the V6 EGR valve needs attention?

Common symptoms are a Check Engine light with EGR‑related codes (P0401, P0404, P0490), rough idle, surging at cruise, pinging, and increased fuel use. High‑kilometre cars that do short trips tend to coke up sooner, so a clean or replacement can restore smooth running.

Should the V6 EGR valve be cleaned or replaced?

If the valve moves freely and the position sensor reads correctly, a careful clean of the valve and intake passages often does the trick. If it’s sticking, electrically faulty, or keeps throwing codes after a clean, replacement with a new gasket is the most reliable fix.