Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
KOEO Code-To-Test Menu - 7.5L (3-Digit Codes)
1991 Ford Cutaway 5.8 H, C6SECTION KOEO Code-To-Test Menu - 7.5L (3-Digit Codes)
KOEO SELF-TEST - CIRCUIT TEST & STEP MENU
| Code No. | Go To: Test No. (Step No.) |
|---|---|
| 112 | DA (20) |
| 113 | DA (10) |
| 114 | DA (1) |
| 116 | DA (1) |
| 117 | DA (20) |
| 118 | DA (10) |
| 121 | DH (2) |
| 122 | DH (10) |
| 123 | DH (3) |
| 126 | DF (1) |
| 327 | DN (1) |
| 328 | DN (25) |
| 334 | DN (20) |
| 337 | DN (5) |
| 511 | QB (3) |
| 513 | Replace ECA unit. |
| 539 | KM (40) |
| 542 | J (20) |
| 543 | J (30) |
| 552 | KC (8) |
| 553 | KC (8) |
| 556 | J (7) |
| 558 | DN (10) |
| 565 | KD (6) |
| 621 | TC (12) |
| 622 | TC (12) |
| 624 | TC (15) |
| 625 | TC (15) |
| 626 | TC (12) |
| 627 | TC (12) |
| 629 | TC (12) |
| 631 | TC (5) |
| 633 | TC (5) |
| 634 | TA (1) |
| 636 | TC (21) |
| 637 | TC (25) |
| 638 | TC (27) |
| 641 | TC (12) |
| 654 | TC (1) |
| 998 | TC (15) |
| No Codes/Codes Not Listed | QA (1) |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.