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 DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - TESTS W/CODES - 1.9LCONTINUOUS CODE-TO-TEST MENU - 1.9L
1991 Mercury Tracer Base, 4D Sedan, Automatic
Continuous Code-To-Test Menu - 1.9L
1991 Mercury Tracer Base, 4D Sedan, AutomaticSECTION Continuous Code-To-Test Menu - 1.9L
CONTINUOUS MEMORY - CIRCUIT TEST & STEP
| Code No. | Go To: Test No. (Step No.) | ||
|---|---|---|---|
| 14 | NC (1) | ||
| 15 | QB (1) | ||
| 18 | NC (3) | ||
| 19 | DR (1) | ||
| 22 | DF (90) | ||
| 29 | DP (1) | ||
| 31 | DL (90) | ||
| 32 | DL (94) | ||
| 33 | DL (97) | ||
| 34 | DL (93) | ||
| 35 | DL (90) | ||
| 41 | H (1) | ||
| 45 | (1) ** | ||
| 46 | (1) ** | ||
| 51 | DA (90) | ||
| 53 | DH (90) | ||
| 54 | DA (90) | ||
| 56 | DC (20) | ||
| 61 | DA (90) | ||
| 63 | DH (94) | ||
| 64 | DA (90) | ||
| 66 | DC (10) | ||
| 67 | TA (1) | ||
| 87 | J (95) | ||
| 95 | J (90) | ||
| 96 | J (93) | ||
| No Codes/Codes Not Listed | QA (1) | ||
|
|||
"CHECK ENGINE"/"SERVICE ENGINE SOON" MIL ACTIVATING CODES
| Abbreviation | Component | Continuous Memory Code |
|---|---|---|
| ECT | Engine Coolant Temperature Sensor | 51, 61 |
| ACT | Air Charge Temperature Sensor | 54, 64 |
| BP | Barometric Pressure Sensor | 22 |
| MAP | Mainfold Absolute Pressure Sensor | 22 |
| VAF | Vane Air Flow Sensor | 56, 66 |
| MAF | Mass Air Flow Sensor | 56, 66 |
| EGO, HEGO | Exhaust Gas O2 Sensor | 41, 42, 91 |
| PFE | Preassure Feedback EGR Sensor | 31, 35 |
| EVP | EGR Valve Position Sensor | 31, 35 |
| TP | Throttle Position Sensor/Switch | 53, 63 |
| ITS | Idle Tracking Switch | 71 |
| IDM (DPDIS) | Ignition Diagnostic Monitor | 18, 28, 48, 88 |
| IDM (DIS) | Ignition Diagnostic Monitor | 45, 46, 48 |
| VAT | Vane Air Temperature Sensor | 58, 68 |
| If D.C. motor does not follow dashpot profile | 13 | |
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.