Acura P3400 Error Code: How to Fix It

Q: What causes Acura P3400 error code?

P3400 is typically caused by a faulty VCM oil pressure switch, bad VCM solenoid, low or dirty engine oil, or blocked oil passages that prevent proper cylinder deactivation operation.

Q: Can I drive with P3400 code?

Yes, you can drive with P3400 code as it mainly affects fuel economy rather than engine safety. However, the cylinder deactivation system won't function properly, reducing gas mileage.

Q: How much does it cost to fix P3400?

Repair costs range from $50-150 for an oil change and filter, $100-300 for VCM oil pressure switch replacement, or $200-500 for VCM solenoid replacement depending on labor rates.

Q: Is P3400 covered under warranty?

P3400 may be covered under powertrain warranty if the vehicle is still under coverage. Some Acura models had extended warranties specifically for VCM system issues - check with your dealer.

Abstract

The Acura P3400 error code indicates a problem with the Variable Cylinder Management (VCM) system's Bank 1 cylinder deactivation. This typically means either the VCM solenoid is faulty or there's an oil pressure issue preventing proper cylinder deactivation operation.