Possible Causes
WARNING: This page is about a different car, the 2003 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
DTC is set when:
- For DTC P0100, an open or short in mass air flow meter circuit for more than 3 seconds at an engine speed 4,000 RPM or less.
- For DTC P0102, an open in mass air flow meter circuit for more than 3 seconds at an engine speed 4,000 RPM or less.
- For DTC P0103, a short in mass air flow meter circuit (+B circuit) for more than 3 seconds at an engine speed 4,000 RPM or less.
- MAF meter circuit is open or shorted.
- Defective MAF meter.
- Defective ECM.