A 232 fuel code (the ONLY thing you need to be concerned with) in turbo cars is almost always a vacuum leak and it's usually a bad elbow hose at the vacuum nipple on the intake manifold just behind the PS pump (front of engine, intake man) or at its other end where it connects to a hose "T" near a sensor on the turbos fresh air intake tube. The same rubber vacuum elbow is used and in time oil disolves the rubber. It'll be obvious by just looking at it and replacing it is not always easy but can be done with the aid of a long needlenose pliers. A "plan B" if that's too hard is to replace the whole section with one long vacuum hose (of good quality) and just bypass the original plastic line buried in conduit under the intake manifold (it doesn't connect to anything else between those two elbows btw).

At 70K, I hope you've changed or are planning to change your T-belt?