RX - 1st Gen (1999-2003) Discussion topics related to the 1999 -2003 RX300 models

New CELs

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Old 01-27-13, 06:57 AM
  #1  
BearsLexus
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Default New CELs

I just popped these 3 two days ago...
The only symptom to show up was last night- The Overdrive will not work, at least that's what it seems like... I push the button and nothing happens. 60 mph = 4000 RPM ... nothing you want to drive on for long.
The 1150 actually shut off the second time it was read in a matter of 15 minutes. I am going up to the Auto Zone and I am going to pick up a new O2 sensor for bank 1 sensor 2 as well as a Clymer/Haynes Manual and I'm gonna get read again.
Has anyone else had this combination, and if so, what might the solution have been?
I am shotgun trouble shooting, because I need to drive 40 miles on the Highway to get to work in the morning, and I don't want my car to blow up! lol and besides, it can't hurt to replace a sensor that's almost 150K old.

P1150 - Air / Fuel ratio sensor circuit range /performance
malfunction (bank 1 sensor 2)
Probable cause :
1- Fuel Pump, Injector or pressure regulator fault
2- Vacuum Leak on engine
3- Faulty AF sensor heater circuit
4- Failed AF Sensor
P0136 - Heated oxygen sensor - bank 1 sensor 2 (H02S12)
circuit malfunction
Probable cause :
1- Open or short circuit condition
2- Air / Fuel ratio concern
3- Air leak near sensor
4- Faulty H02S12 (Bank 1 Sensor 2)
P0171 - System too lean - bank 1 (Cylinder number 1 denotes bank 1)
Probable cause :
1- Lean Air / Fuel ratio Fuel injector or vacuum leak
2- MAF sensor concern
3- ECT sensor fault
4- Faulty H02S (heated oxygen sensor)
Old 01-27-13, 07:56 AM
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BearsLexus
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Default New CELs Part Deux

So I just went to the auto parts store and my CEL went out. I believe that the problem may be vacuum lines (at my buddy's suggestion from the store)so I bought 12 feet of new line and am going to change as many of my vacuum lines as possible.
My buddy thinks this may be the issue because here in northern Ohio it has been in the low teens for about a week and there have been MANY people coming in because of CELs and when read, they always point to vacuum line leaks. It is now 27 degrees outside, and my CEL has shut off.
I'll keep things posted as time goes on.
And F- paying $100 for a new sensor if I don't need one!
BearsLexus
Old 01-27-13, 08:18 AM
  #3  
hypervish
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Default

That is a possibility.

Also, if in case you do lose overdrive on the way to work. It is safe to drive like that, just make sure to warm up the car before you start driving at 4k down the highway.

BTW: Remember to only use a Denso sensor in case you do end up needing one. They are cheapest on Amazon. Generally though a P1150 doesn't lock out 4th gear.
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