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Home >> Acura >> 1995 >> 2.5TL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Trouble Codes >> Code P0102 - MAF Sensor Low Input
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Code P0102 - MAF Sensor Low Input

  1. Clear codes. Start engine. Retrieve codes. If Code P0102 appears, go to next step. If Code P0102 does not appear, problem is intermittent. Inspect for poor connections or loose wires at MAF sensor and ECM, then repair as necessary.
  2. Follow scan tester manufacturer's instructions to read mass airflow. If indicated airflow is zero grams per second, go to next step. If indicated airflow is greater than zero grams per second, problem is intermittent. Inspect for poor connections or loose wires at MAF sensor and ECM, then repair as necessary.
  3. Turn ignition off. Unplug MAF sensor connector. Turn ignition on. Measure voltage at Yellow/Black wire at harness connector. If battery voltage exists, go to next step. If battery voltage does not exist, repair open Yellow/Black wire between main relay and MAF.
  4. Turn ignition off. Connect MAF sensor wiring. Start engine. Measure voltage between ECM terminals D9 and D19. If voltage is not 1.1-1.6 volts, go to next step. If voltage is 1.1-1.6 volts, temporarily substitute known good ECM, then retest system.
  5. Turn ignition off. Unplug 22-pin connector "D" from ECM. Unplug MAF sensor connector. Test for continuity between White/Blue wire at MAF sensor connector and ground. If continuity does not exist, go to next step. If continuity exists, repair shorted White/Blue wire.
  6. Connect jumper between ECM harness connector terminal D19 (White/Blue wire) and ground. Test for continuity between MAF sensor connector White/Blue wire and ground. If continuity exists, replace MAF sensor. If continuity does not exist, repair White/Blue wire.
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