Subaru Error Code P1491: How to Fix It

Q: Can I drive my Subaru with error code P1491?

Yes, you can typically drive with P1491 as it's a low-severity code, but you should address it promptly as it can affect fuel economy and emissions. Avoid extended high-performance driving until repaired.

Q: How much does it cost to fix Subaru P1491?

DIY repair costs $30-80 for a new PCV valve. Professional repair typically costs $150-300 including parts and labor, depending on whether wiring repairs are needed.

Q: What causes Subaru P1491 error code?

Common causes include a faulty PCV valve solenoid, damaged wiring harness, corroded electrical connections, or rarely, a problem with the engine control module.

Q: Will P1491 cause my Subaru to fail emissions testing?

Yes, P1491 can cause your vehicle to fail emissions testing since it affects the PCV system which is part of the emissions control system. The code must be resolved and cleared before testing.

Abstract

Subaru error code P1491 indicates a fault in the PCV (Positive Crankcase Ventilation) system valve circuit. This error occurs when the engine control module detects an electrical problem with the PCV valve solenoid or its wiring, which can affect engine performance and emissions.