Subaru Error Code P1094: How to Fix It

Q: What causes Subaru error code P1094?

P1094 is typically caused by a faulty tumble generator valve B1, damaged wiring harness, poor electrical connections, or vacuum leaks in the tumble generator system.

Q: Can I drive with P1094 error code?

Yes, you can drive short distances, but the engine may experience reduced performance, poor fuel economy, and increased emissions. Get it repaired promptly to avoid potential engine damage.

Q: How much does it cost to fix P1094?

Repair costs range from $50-150 for vacuum lines or wiring repairs, to $200-400 for tumble generator valve replacement including labor at a repair shop.

Q: Will P1094 cause my Subaru to fail emissions testing?

Yes, P1094 will likely cause your vehicle to fail emissions testing since it affects the engine's air/fuel mixture control system. The code must be resolved before passing inspection.

Abstract

Subaru error code P1094 indicates a problem with the tumble generator B1 control circuit, specifically a low input signal. This system helps optimize air/fuel mixture in the intake manifold for better engine performance and emissions control.