No. 2 Check Engine Light Illuminates: Notes

2	CHECK ENGINE LIGHT ILLUMINATES
DESCRIPTION	Check engine light illuminates incorrectly. NOTE: If there is a malfunction in the engine system, the PCM stores a DTC and illuminates the check engine light.
POSSIBLE CAUSE	Emission system malfunction (DTC is stored in PCM) Short or open circuit in wiring harness between the following terminals: Instrument cluster terminal B-Active driving display terminal J Instrument cluster terminal D-Active driving display terminal L Active driving display terminal I-Front body control module (FBCM) terminal 2K Active driving display terminal K-Front body control module (FBCM) terminal 2I Front body control module (FBCM) terminal 2P-PCM terminal 2S Front body control module (FBCM) terminal 2N-PCM terminal 2T Instrument cluster malfunction
Courtesy of MAZDA MOTORS CORP.