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10 DIAGNOSTICS
Figure 10.6
DFI Code 13:
Oxygen Sensor Not
Ready
FPO
On-board diagnosis also Code 70 represents a decision point in the diagnostic procedure. At this
examines the status of point, the mechanic has several choices, including:
several switches. Perform switch tests.
Display engine data.
Perform output cycling tests.
344 UNDERSTANDING AUTOMOTIVE ELECTRONICS
