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.
1990 Ford Tempo BaseFACTORY OEM SERVICE PROCEDURE
Malfunction Indicator Application: Notes
COMPONENT-TO-CONTINUOUS MEMORY CODE APPLICATION
| Abbreviation | Continuous Memory Code |
|---|---|
| ECT - Engine Coolant Temp Sensor | 51, 61 |
| ACT - Air Charge Temp Sensor | 54, 64 |
| BP - Barometric Pressure Sensor | 22 |
| MAP - Manifold 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 - Pressure Feedback EGR | 31, 35 |
| EVP - EGR Valve Position Sensor | 31, 35 |
| TP - Throttle Position Sensor | 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 | 58, 68 |
| If D.C. motor does not follow dashpot profile | 13 |
Factory Service Tools
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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.
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