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Ok I pulled some codes (without a reader- blinky blinky) however I dont know what to do about them. Also if I did not get a code for the OX sensor does that mean I definitly dont need one?
1989 F250 XLT Lariat 460 FI
34= PFE or EVP circuit above the closed limit of 0.67 volts.
41= (KOEO did not have a check mark by it):
HEGO sensor circuit indicates system lean (right side)
No HEGO switching detected always lean (right side)