'99 Avalon with MIL and Trac Light On

[edge10]

I have a '99 Avalon with both the MIL and Trac Off light on. The MIL came on first with codes P0125 and P1133 pending. After some research I believe this was caused by a bad A/F sensor on B1/S1. I have not replaced the sensor yet. I checked the codes a second time before the Trac Off light ON and the additional codes were P1133, P1135, P1135 Pending. After about 200 - 300 miles the Trac Off light came on. This happened during/after a two times spinning the tires from a stop in the rain. I justed scanned for codes and found no additional codes compared to the second time.

[cexsiman]

I do not know what you mean by "MIL" but if you are talking about your CEL check engine light, the same thing has happened to me about 10 times now. and only in combination with one another. It only started after i put different wheels on my car (stock RSX wheels, and i know its blasphemy and i did get them to fit correctly)

they will both reset if you drive slower and dont push the car for ~200 miles. i dont know why, it just happens.

and i dont know yet how to fix it, except for resetting the trouble codes.

[toyomoho]

All of these codes are related to the sensor.

The TRAC system will turn off if the CEL comes on to minimize engine load.

Fix the issue with the trouble codes and the TRAC system will turn on again.

[new echo owner]

'MIL' is actually what Toyota usually use, Malfunction Indicator Light.

Check what toyomoho said.

N.E.O.