Code 86: Notes
WARNING: This page is about a different car, the 1990 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
Excessive lean fuel mixture condition corrected (made richer) by adaptive fuel strategy.
If an over-rich fuel condition is suspected or experienced, check ignition system. Burn off fuel deposits on HEGO by operating the vehicle at sustained high (legal) speeds followed by a few hard acceleration runs. This will allow the HEGO contamination to be burned off. Check the following areas: