1997 Volkswagen Jetta Q&A

1997 Volkswagen Jetta Question: What do a red engine light and CAT light mean if both appear at same time?

What do a red engine light and CAT light mean if both appear at same time? This appeared yesterday after i had driven for over two hours about town. I was returning home after parking the car for about 3 hours when i noticed the lights on the dashboard. What does it mean? Could it be a fault with the charging system? -
Answer 1
have codes read and post so we can adv -