GM P1404 Error Code: How to Fix It

Q: What causes GM P1404 error code?

P1404 is typically caused by carbon buildup preventing the EGR valve from closing properly, a faulty EGR position sensor, vacuum leaks in EGR system lines, or electrical connection problems at the EGR valve.

Q: Can I drive with P1404 error code?

You can drive short distances with P1404, but the vehicle may experience rough idling, poor fuel economy, and will likely fail emissions testing. Address the issue promptly to prevent potential engine damage from improper air-fuel mixture.

Q: How much does it cost to fix P1404?

DIY repair costs $20-50 for cleaning supplies and new gaskets. Professional repair ranges from $150-400 depending on whether cleaning solves the issue or if EGR valve replacement is needed ($200-350 for the part plus labor).

Q: Will P1404 cause my car to fail inspection?

Yes, P1404 will cause your vehicle to fail emissions inspection in most states. The error code indicates the emissions control system is not functioning properly, which is an automatic inspection failure.

Abstract

The GM P1404 error code indicates an EGR (Exhaust Gas Recirculation) closed pintle position fault, meaning the EGR valve is not closing properly or the position sensor is malfunctioning. This can cause rough idling, poor fuel economy, and failed emissions tests.