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.
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HOMESERVICE MANUALSMERCURY1991TRACER BASE, 4D SEDAN, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - TESTS W/CODES - 1.9LKOER CODE-TO-TEST MENU - 1.9L
1991 Mercury Tracer Base, 4D Sedan, Automatic
KOER Code-To-Test Menu - 1.9L
1991 Mercury Tracer Base, 4D Sedan, AutomaticSECTION KOER Code-To-Test Menu - 1.9L
KOER SELF-TEST - CIRCUIT TEST & STEP MENU
| Code No. | Go To: Test No. (Step No.) |
|---|---|
| 12 | KE (1) |
| 13 | KE (15) |
| 18 | PC (1) |
| 21 | DA (1) |
| 23 | DH (1) |
| 24 | DA (1) |
| 26 | DC (1) |
| 31 | DL (21) |
| 32 | DL (20) |
| 33 | DL (30) |
| 34 | DL (25) |
| 35 | DL (25) |
| 41 | H (1) |
| 42 | H (1) |
| 56 | DC (20) |
| 72 | DF (10) |
| 73 | DH (20) |
| 74 | FD (1) |
| 77 | M (1) |
| 98 | Go to KOEO SELF-TEST |
| 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.