OK car has been having idle surge issues. Neighbor had a scan tool so we ran it and came up with alot of codes:

13 Cannot control RPM during ER Self-Test low RPM check.
15 EEC permanent Read Only Memory (ROM) test failed.
21 ECT out of self test range 0.3 to 3.7 volts.
31 PFE or EVP circuit below minimum voltage of 0.24 volts.
41 No HEGO switching detected always lean (right side).
66 TOT sensor output was less than Self-Test minimum value of 0.15 volts.
91 HEGO sensor circuit indicates system lean (left side).

LOL

Where should I even start?

 

Joel 5.0