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Home › Ford › 1990 › Probe LX, Automatic › Repair and Diagnosis › Engine Performance › System › Engine Controls - Tests W/Codes - 3.0L › Test H - Fuel Control › Code 86 › Codes 41 and 42

Codes 41 and 42

Intermittent HEGO circuit (SIG or GND circuit).
Contaminated HEGO sensor, lead or silicone fouled.