hi

has anyone encountered check engine light turning on with their matrix before.

today the check engine light on my car light up again. this is the 4th time it happened since i got the car in oct 2003. There is no loss of power or drive. just feels like the engine is slightly rougher, but not by a lot, could be my imagination!

reason i got from service centre in the past 3 times:
1) ECU connector lose
2) O2 sensor faulty (apparantly there is 2 O2 sensor in matrix, both have been changed before)

just curious if it is happening only to me or has anyone encountered too.

i am using SPC 92 petrol, but i doubt that is the cause as the manual states that any grade above 91 is ok (i think).

just have to send in and see what they say tomorrow.

For those living in Singapore, enjoy the long weekend.

could be bad fuel quality that affects your O2 sensor ... could be your control unit ( ECU ) I had the same problem and I changed the O2 sensor and the MAP sensor two times and finally they discovered that the main reason was the ECU and they replaced it under warranty ...
by the way ... do you have your check light going ON when moving the key to ON position before starting the car then OFF again ? or should it only be ON when there is a problem ?!!