LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 1989 >> Bronco II RWD, Standard, M5OD-R1 >> Repair and Diagnosis >> Engine Performance >> System >> 2.9L CEC Tests W/Codes >> Quick Test >> Key On Engine Running (KOER) Codes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Key On Engine Running (KOER) Codes

KEY ON/ENGINE RUNNING (KOER) CIRCUIT TEST MENU

Code No. Go To: Circuit Test No. (Step No.)
12 D5  (1)
13 D5  (13)
18 D13  (1)
21 B5  (1)
22 B6  (7)
23 B8  (1)
24 B2  (1)
25 B7  (1)
41 C1  (10)
42 C1  (22)
72 B6  (10)
73 B8  (10)
74 B14  (7)
77 D10  (1)
98 (1)
No Codes, Codes Not Listed D14  (1)
(1) If Code 98 is displayed, go back and perform KEY ON/ENGINE OFF (KOEO) SELF-TEST and obtain a Code 11 for KEY ON/ENGINE OFF SELF-TEST portion of QUICK TEST.