I have a 1991 Seville I recently purchased, very clean exterior, interior not to bad, 148k miles. Sadly last oild change (Last recored Oil change) was almost 10k miles ago, the air filter had holes an ripped portions an was plain filthy. Following codes where present:
E046
E052
E098
E123 an or E125 (Sounds silly but cleared codes before recording last code properly)
Oops
If anyone has some input please leave a reply or comment!