EEC IV - Invalid/Erratic Service Codes
Article No. 85-12-12EEC IV - INVALID, ERRATIC SERVICE CODES
FORD 1983-85 ESCORT, EXP, MUSTANG, LTD, THUNDERBIRD, CROWN VICTORIA
LINCOLN-MERCURY 1983 LN7, 1983-85 LYNX, CAPRI, MARQUIS, GRAND MARQUIS, CONTINENTAL, LINCOLN TOWN CAR, 1984-85 MARK VII
LIGHT TRUCK 1985 RANGER, 1984-85 E/F SERIES AND BRONCO
CALIBRATIONS: All with EEC IV
WARNING: This modification is authorized only for the listed engines. Performing this modification on other engine calibrations is unauthorized and could create liability under applicable federal or local laws.
The following chart summarizes known invalid service codes and erratic quick test results. The chart also lists related TSB articles. Check this chart and read any related TSB article to determine if the code is valid.
OTHER APPLICABLE ARTICLES: 83-21-17, 84-4-24, 84-17-19, 84-23-1, 85-2-6, 85-4-25, 85-4-29, 85-5-21, 85-5-30, 85-5-31, 85-8-9, 85-8-13, 85-8-26
WARRANTY STATUS: "INFORMATION ONLY"
MODEL ENGINE QUICK TEST VEHICLE APPLICATION TSB
YEAR MODE(S) CODE(S)
EEC IV
1983/84 ALL WITH KOER ERRATIC All pass. cars and trucks so equipped 84-23-1
E-CORE COIL
1984 3.8L KOER String of codes Mustang/Capri LTD/Marquis T'Bird/Cougar 85-4-25
5.0L KOER in continuous Mustang/Capri T'Bird/Cougar Crown Vic/Grand Marquis
memory Mark VII/Continental Lincoln Town Car
1984/85 5.0L CFI KOEO Repeated All Ford/Mercury/Lincoln Products So Equipped 85-8-9
Continuous Codes
1984 5.0L CFI KOEO 22 Mustang/Capri T'Bird/Cougar Crown Vic/Grand Marquis 84-4-24
Mark VII/Continental Lincoln Town Car
1984 4.9L KOER 23 E/F Series & Bronco 84-17-19
1984 4.9L KOER 23, 41, 42 E/F Series & Bronco 83-21-17
1985 4.9L KOEO 15 E/F Series & Bronco w/ATX 85-5-30
1985 2.3L HSC KOEO 22 Tempo/Topaz 85-2-6
1985 1.6 EFI & T/C KOER 23 Escort/Lynx/EXP 85-8-13
2.3 EFI & T/C KOER 23 T'Bird/Cougar/SVO Mustang
1985 5.0L EFI KOER 25 F Series/Bronco 85-5-31
1985 2.3L EFI & T/C KOEO/KOER 26 Merkur w/MTX 85-4-29
KOEO 67
1985 2.3L EFI KOER 34 Ranger 85-8-26
TWO-SPEED ACCESSORY DRIVE
1985 5.0L KOEO 22, 24, 26 Mustang/Capri 85-5-21
KOER 22, 24, 25, (Deletion of Two-Speed Accessory Drive)
26, 38