'99 Avalon with both the MIL and Trac Off light On

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Old 06 Nov 2008, 09:18 pm   #1 (permalink)
edge
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Default '99 Avalon with both the MIL and Trac Off light On

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. I was not driving the car at the time, but from what I can tell
it happened during/after a two times spinning the tires from a stop in
the rain. I just scanned for codes and found no additional codes
compared to the second scan above.
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Old 06 Nov 2008, 11:09 pm   #2 (permalink)
johngdole@hotmail.com
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Default Re: '99 Avalon with both the MIL and Trac Off light On

P0125 means insufficient coolant temperature for closed-loop control.
So you have to check if the thermostat is stuck open before changing
out the oxygen sensor. If the temperature is too low, I wouldn't be
surprised that the sensor is slow to switch (P1135).


On Nov 6, 7:18*pm, edge <thedge...@yahoo.com> wrote:
> 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. * *



The wheels spinned is probably the only reason. Try resetting the Trac
system following the manual, if that's even needed.

After about 200 - 300 miles the Trac Off light came
> on. * I was not driving the car at the time, but from what I can tell
> it happened during/after a two times spinning the tires from a stop in
> the rain. * I just scanned for codes and found no additional codes
> compared to the second scan above.


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