Exhaust System Concerns
- Test emissions.
- Check exhaust system. See CIRCUIT TEST HF in TESTS W/CODES - 2.5L article.
- Check EGR system. See CIRCUIT TEST HE in TESTS W/CODES - 2.5L article.
- Check engine compression. Check engine mechanical condition. Check intake manifold, manifold gasket, camshaft and valves.
- Perform QUICK TEST. See TESTS W/CODES - 2.5L article.
- Check PCV system.
- Check cooling system.