Having problems with your 2006 Mitsubishi Galant ?
Code p0431 shows on a code checker i used at autozone, there system says this either a exhaust leak in front of the catalyctic converter or the catalyctic converter is bad
It can also be the Oxygen Sensor (O2 Sensor)
Repair Help & Product Troubleshooting for 2006 Mitsubishi Galant
Tips for a great answer:- Provide details, support with references or personal experience .
- If you need clarification, ask it in the comment box .
- It's 100% free, no registration required.