Acura Error Code P0303: How to Fix It

Q: Can I drive my Acura with a P0303 code?

You should avoid driving with a P0303 code as it indicates an engine misfire that can damage the catalytic converter and cause poor fuel economy. If you must drive, do so gently and get it diagnosed immediately.

Q: How much does it cost to fix Acura P0303?

Costs vary widely depending on the cause: spark plugs ($50-150), ignition coils ($200-400), fuel injector cleaning ($150-300), or major engine work for VCM issues ($2000-5000+). Start with the least expensive diagnostics first.

Q: Is P0303 common in Acura VCM engines?

Yes, P0303 is particularly common in Acura's VCM engines (like V6 models from 2005-2017) due to oil consumption and piston ring wear. The VCM system's cylinder deactivation can cause oil fouling in the deactivated cylinders.

Q: Will P0303 cause my Acura to fail emissions?

Yes, a cylinder misfire will typically cause your vehicle to fail emissions testing. The misfire affects combustion efficiency and can damage the catalytic converter, both of which are monitored during emissions tests.

Q: How do I prevent P0303 from coming back?

Regular maintenance including timely oil changes, using quality fuel, replacing spark plugs per schedule, and addressing VCM-related issues early can help prevent P0303. Some owners opt for VCM disable modifications to prevent cylinder deactivation problems.

Abstract

The P0303 error code on your Acura indicates a misfire detected in cylinder 3, which means the engine cylinder isn't firing properly. This is especially common in Acura's VCM (Variable Cylinder Management) engines due to piston ring wear, but can also be caused by faulty spark plugs, ignition coils, or fuel injectors.