1988 Ford Festiva L PlusFACTORY OEM SERVICE PROCEDURE

ECA 8 - Code 13 (Map Sensor)

  1. Check for loose connectors, corrosion or damage at MAP sensor and ECA terminals 2E and 2A. Repair as necessary.
  2. Check for 12 volts at Black/White wire at MAP sensor connector. If 12-volt signal is not present, check for open in wire between ignition switch and MAP sensor. Repair as necessary.
  3. Check voltage at MAP sensor Light Green wire terminal. Voltage reading should be about 5 volts. If 5-volt signal is not present, check for open or short in wire between MAP sensor and ECA terminal 2A. If no problem is found, replace ECA.
  4. With engine warm and idling, check voltage at MAP sensor Brown/Black terminal. Voltage reading should be .8-1.5 volts. If voltage is not within specification, replace MAP sensor.
  5. Check continuity of wiring from MAP sensor to ECA. Repair or replace as necessary. If symptom persists after repairs are made, go to ECA 55  .
  6. Check wiring for shorts from MAP sensor Black terminal to ECA terminal 2C and from MAP sensor Black/Brown terminal to ECA terminal 2E. Repair as necessary. If no problems are found, replace ECA.
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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.