Lexus RX 300 2000

parrott · #1 (**permalink**) 06-10-2006, 11:43 AM

I would like to say Hi to everyone as I just joined. My Lexus has been pretty much flawless up to now. 115,000 miles. I now have the check engine light on. Autozone did a check with the scan tool.
P1130
P0125
P1133
P1135
It says on the printout what it is but not what to replace.
I'm pretty mechanically inclined. Are there any parts I can buy and replace to fix these?

nhparrot · #2 (**permalink**) 06-10-2006, 12:47 PM

P0125 Insufficient Coolant Temp. for Closed Loop Fuel Control
Open or short in A/F sensor (bank 1, 2 sensor 1) circuit
A/F sensor (bank 1, 2 sensor 1)
Air induction system
Fuel pressure
Injector
Gas leakage on exhaust system
ECM

P1130 A/F Sensor Circuit Range/Performance Malfunction (Bank 1 Sensor 1)
Open or short in A/F sensor circuit
A/F sensor
Air induction system
Fuel pressure
Injector
ECM

P1133 A/F Sensor Circuit Response Malfunction (Bank 1 Sensor 1)
Open or short in A/F sensor circuit
A/F sensor
Air induction system
Fuel pressure
Injector
ECM

P1135 A/F Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
Open or short in heater circuit of A/F sensor
A/F sensor heater
ECM

Eddie · #3 (**permalink**) 06-10-2006, 01:58 PM

Replace bank 1 sensor 1 (rear head,sensor before cat) AF sensor. The coolant temp sensor circuit is tied into the AF sensor circuit too.

parrott · #4 (**permalink**) 06-11-2006, 09:39 PM

Thanks. I will get one tomorrow and change it out. My car also will not idle some time. Under 1000 rpms it just shuts off. I can keep it over 1000 and drive but when I let off the gas it shuts right off. After I drive it down the road a ways it will run fine. After I replace the sensor do I go back to Autozone to have anothe scan done?

Eddie · #5 (**permalink**) 06-11-2006, 10:20 PM

Quote:

Originally Posted by parrott

Thanks. I will get one tomorrow and change it out. My car also will not idle some time. Under 1000 rpms it just shuts off. I can keep it over 1000 and drive but when I let off the gas it shuts right off. After I drive it down the road a ways it will run fine. After I replace the sensor do I go back to Autozone to have anothe scan done?

Sounds like the idle air control motor is going bad. You won't get codes with a bad IAC though. After replacing the AF sensor see if the idling problem still happens...I don't want someone replacing more parts unless it's necessary.

cipiripi · #6 (**permalink**) 06-24-2006, 07:39 PM

I am having same problem on my car, exactly same codes. Would you please let us know did this sensor fix your problem. I would really appreaciate it and all other owners too.
Thanks and have a great day!

TBURK · #7 (**permalink**) 09-17-2006, 05:03 PM

PARROTT,

Is your problem resolved?

Thank you,
Tom

Quote:

Originally Posted by cipiripi

I am having same problem on my car, exactly same codes. Would you please let us know did this sensor fix your problem. I would really appreaciate it and all other owners too.
Thanks and have a great day!

dougiewest · #8 (**permalink**) 09-28-2008, 02:59 PM

Hi I have a 2003 rx 300 I took the car for a oil change and filled up the tank with 83 gas in stead of 93 gas 2 days later im driving the car and the vsc light come on and the check engine light comes on I read the code and getting bank 1 sensor 1 and heater circuit malfunction bank 1 sensor 1 could this be friom the bad gas? the car runs fine and since then i filled it up with the right gas more thasn 3 tanks light is still on and is the sensor for bank 1 sensor 1 the first sensor before the cat by the header?