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Car Forum / Lexus Cars / March 2005

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RX 300: Transmission fix led to check engine lights on

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Bhavik  Shah - 17 Feb 2005 17:39 GMT
Hi,

I have a 99 RX300, i just had my transmission fixed. The car just stop
working - and i have realized that these transmission problems are
common in RX300s. But the real problem now is that right after i picked
it up from the shop, the check engine lights came on, also the trac off
lights come on after few miles - since it was saturday the aamco shop
where i had my transmission fixed was closed and i was travelling. when
i took it to the aamco shop near my house they said it was some oxygen
sensor code. I never had the check engine lights come on at all before.
My question is how could fixing the transmission lead to check engine
lights on?

I tried to reset it by unplugging the battery, but after i plugged it
back in, the lights came on after few miles.

Please help me with whatever you can!!!
Ray O - 17 Feb 2005 19:03 GMT
> Hi,
>
[quoted text clipped - 13 lines]
>
> Please help me with whatever you can!!!

It is possible that a connection between the transmission and electronic
control unit is loose, and that would cause a check engine light to
illuminate.

If Aamco shop checked the codes in the computer and an oxygen sensor
malfunction is indicated, then it is probably a coincidence that the sensor
failed so soon after the transmission repair.

You can clear the code with an OBD II scan tool that you can borrow at some
parts stores or you can clear the code by leaving the battery disconnected
for at least a couple of minutes.  If the computer still detects a fault in
the system, then the check engine light will keep coming on until the fault
is fixed.
Signature

Ray O
correct the return address punctuation to reply

Jer - 22 Feb 2005 21:36 GMT
> > Hi,
> >
[quoted text clipped - 27 lines]
> the system, then the check engine light will keep coming on until the fault
> is fixed.
FF_spunk - 30 Mar 2005 05:12 GMT
ok sometimes removal of exhaust is required to remove or replace a
transmission the O2 sensor can be found on the exhaust system and most
vehicles have anywhere from 1-4 O2 sensors on them if any are unplugged or
wires not properly routed could be against exhaust and melted or shorted.
the fix most the time is looking at exhaust system and locate O2 sensors
make sure all are plugged in and do not look broken.broken O2 sensors are
common in transmission repair facilities since most exhaust sytems are
routed either beside or under the transmission itself.aamco is national
company although independantly owned the warranty on work is good at any
aamco.have them rack the car up and check the oxygen sensors are plugged in
and not shorted against the exhaust... if you dont get satisfaction there is
an 800 number to corporate aamco HQ customer relations .call them and set a
complaint rolling aamco corporate will see to it that your problem is
resolved<number can be found on your aamco repair order or warranty booklet>
hope that helps you some. K Mcreynolds Aamco certified master rebuilder
A.S.E. certified transmisssion tech

> > > Hi,
> > >
[quoted text clipped - 42 lines]
> fault
> > is fixed.
 
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