Ford Historic (OBD I) Diagnostics

Read KOEO Codes

The Read KOEO Codes function activates the KOEO and Continuous Memory self-tests which retrieve KOEO and continuous memory diagnostic trouble codes (DTCs) from the PCM.

KOEO DTCs are transmitted through the PCM data link when a trouble condition is active. KOEO codes remain until the trouble condition becomes inactive – usually when the fault is repaired.

Continuous Memory DTCs are stored in the vehicle’s memory at the time of occurrence during continuous self-test monitoring. They remain there until the problem does not reoccur within 40 warm-up cycles, Fast KOEO codes have been read, or the Erase Codes function has been run. Continuous memory codes follow the KOEO codes in the datastream.

The DTCs are transmitted in two formats; both transmit the same information:

Slow Codes are regular service codes that allow the user to identify the faults with an analog voltmeter or the check engine light. Slow Codes are transmitted within 3 minutes.

Fast Codes are transmitted within seconds and must be read with a diagnostic tool. Retrieving Fast Codes erases continuous memory codes, Slow Codes does not. Fast Codes do not apply to MECS vehicles.

From the Diagnostic Codes Menu:

1.Select Read KOEO Codes. •Use UP or DOWN arrow key until Read KOEO Codes is highlighted.

•Press ENTER.

2.Select Fast Codes or Slow Codes.

•Use UP or DOWN arrow key until selection is highlighted.

•Press ENTER.

6

Diagnostic Codes Menu

Read KOEO Codes

Read KOER Codes

Erase Codes

IVSC Speed Ctrl 

Review Data

Print Data

Code Lookup

Select Code Type

￿Fast Codes Slow Codes

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Actron CP9190 Read Koeo Codes, Select Fast Codes or Slow Codes, Use UP or Down arrow key until selection is highlighted