Code Definition
- DTC P0101: Mass Or Volume Air Flow Circuit Range/Performance Malfunction
- DTC P0102: Mass Or Volume Air Flow Circuit Low Input
- DTC P0103: Mass Or Volume Air Flow Circuit High Input
Note. Before performing any diagnostic test, refer to WARNINGS, CAUTIONS and NOTES in DIAGNOSTIC TESTS .
Note. Testing individual components does not isolate shorts or opens. Perform all voltage tests using a Digital Volt-Ohmmeter Meter (DVOM) with a minimum 10-megohm input impedance, unless stated otherwise in test procedure. Use ohmmeter to isolate wiring harness shorts or opens.
Diagnostic Aids
Engine/Transaxle Control Module (E/TCM) or Engine Control Module (ECM) continuously monitors MAF sensor output. E/TCM or ECM will set code sensor output voltage has continued to be 4.5 volts or higher for 4 seconds. Check for following possible problems
- Open between MAF sensor and ECM control relay.
- Open or short between MAF sensor and E/TCM or ECM.
- Short between MAF sensor and E/TCM or ECM harness.
- Dirty air cleaner.
- Air leak in take system.
- Contaminated, deteriorated or damaged MAF sensor.
- Poor connection at E/TCM or ECM, MAF sensor or TP sensor.
- Faulty MAF sensor or TP sensor.