Chevrolet S10 4.3 vortec v6 4x4 crew cab 2001

Question

Po446 service engine soon code how do I fix this?

Answer 1

Hi there,

This code is caused by a leak in the evap system. The most common issue would be a faulty vent control solenoid, or missing or loose fuel cap. If these are good then the best method for diagnosing the issue is a smoke test.