Rx300 Code P1135
06-29-11, 11:58 PM
#31
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Join Date: Oct 2007
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Denso any good ?
Please let us know if this solves your problem. What vehicle is this for and what is the code you are attempting to fix? Looking forward to getting more info on those Denso's.
I have a P1135 on an '02 RX300 and the sensor near the firewall is reading infinite Ohms (open circuit) on the heater leads. This is bugging me. A P1135 is supposed to mean >8Amps but an open circuit should be 0Amps. Shouldn't this have a different code?
I have a P1135 on an '02 RX300 and the sensor near the firewall is reading infinite Ohms (open circuit) on the heater leads. This is bugging me. A P1135 is supposed to mean >8Amps but an open circuit should be 0Amps. Shouldn't this have a different code?
09-29-18, 03:23 PM
#35
Driver School Candidate
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All,
The Engine and VCS lights came on and I started researching about it through this and other Lexus posting (which helped me learn a LOT) and I did the following.
1.- Took my car to a local Autozone to get a computer readout. The DTC code shown was P1135 A/F Sensor Heater Circuit (Bank 1 Sensor 1) - FREE of charge!!!
2.- I looked-up part numbers and prices for this sensor, including my Lexus dealer.
Toyota part number: 89467-48011 $228 (Lexus dealer)
Denso part number: 234-9009 $163 (cheapest I found)
Walker part number: 250-54001 $200
3.- Learned (the hard way) the Bank 1, Sensor 1 is the one towards the rear of the engine connected to the exhaust manifold. You can only get to it from under the car. (Very painfull)
4.- Since it looked like I was going to "spit-off" $300 - $400 because of a lousy sensor, I decided to take a calculated chance and looked at my local junk yard for an engine with the right sensor still on it. To locate an engine with the correct sensors you can go to www.densoproducts.com and do a search for 234-9009. You will get a list of all the Lexus/Toyota models that take the same oxigen sensor, I got 18 total. In my case I found a '99 RX 300 engine with both sensors on. PRICE $50.00!!!
5.- Disconect the negative terminal of your battery
6.- Lift the car so you can get under (I used ramps, front end) and disconnect the wire to the sensor (8" from the sensor)
7.- Using a O2 sensor socket replace the sensor and re-connect the wire.
8.- Re-connect your battery
9.- Start your car and the Engine and VSC lights disappear!!!
As I mentioned above I'm chancing the durability of the sensor since I'm putting a used one, but if it fails again, $50 more bucks and I'm still ahead...
Just wanted to tell my long story as some of you may learn from my experience.
The Engine and VCS lights came on and I started researching about it through this and other Lexus posting (which helped me learn a LOT) and I did the following.
1.- Took my car to a local Autozone to get a computer readout. The DTC code shown was P1135 A/F Sensor Heater Circuit (Bank 1 Sensor 1) - FREE of charge!!!
2.- I looked-up part numbers and prices for this sensor, including my Lexus dealer.
Toyota part number: 89467-48011 $228 (Lexus dealer)
Denso part number: 234-9009 $163 (cheapest I found)
Walker part number: 250-54001 $200
3.- Learned (the hard way) the Bank 1, Sensor 1 is the one towards the rear of the engine connected to the exhaust manifold. You can only get to it from under the car. (Very painfull)
4.- Since it looked like I was going to "spit-off" $300 - $400 because of a lousy sensor, I decided to take a calculated chance and looked at my local junk yard for an engine with the right sensor still on it. To locate an engine with the correct sensors you can go to www.densoproducts.com and do a search for 234-9009. You will get a list of all the Lexus/Toyota models that take the same oxigen sensor, I got 18 total. In my case I found a '99 RX 300 engine with both sensors on. PRICE $50.00!!!
5.- Disconect the negative terminal of your battery
6.- Lift the car so you can get under (I used ramps, front end) and disconnect the wire to the sensor (8" from the sensor)
7.- Using a O2 sensor socket replace the sensor and re-connect the wire.
8.- Re-connect your battery
9.- Start your car and the Engine and VSC lights disappear!!!
As I mentioned above I'm chancing the durability of the sensor since I'm putting a used one, but if it fails again, $50 more bucks and I'm still ahead...
Just wanted to tell my long story as some of you may learn from my experience.
10-10-20, 10:36 AM
#36
I have a 2002 RX 300. The Check Engine light came on along with Trac Off and VSC . Did a diagnostic check and had a P1135 code.
Because of the code I put in a new O2 sensor, the one between the firewall and engine. After the new sensor it still generated the same code. I checked the vacuum line behind the air filter and it is on properly. Gas cap is tight. Does anyone have any ideas on what the problem is?
Thanks
Because of the code I put in a new O2 sensor, the one between the firewall and engine. After the new sensor it still generated the same code. I checked the vacuum line behind the air filter and it is on properly. Gas cap is tight. Does anyone have any ideas on what the problem is?
Thanks
10-10-20, 08:46 PM
#37
Moderator
I also have a 2002 RX300 and "Check Engine Lights" came ON. My Scanner indicated Code P1135 A/F Bank 1 Sensor 1 Malfunction. Researched the location of the Sensor and found that it is between the firewall and the back of the Engine just after the manifold. I ordered that part and hope it will clear my Bad Code P1135. I will check the Resistance of the new Sensor and make sure it falls between 0.8 and 1.4 Ohms. Otherwise, I will need new sensor to clear the code. If any has an idea whet the best part manufacturer is,to advise. I read DENSO makes good sensors and compatible with Lexus RX300. Thanks in advance for any help and clarity. Best Wishes, and Good Health! EJ. Dossary, EE
Lexus/Toyota does not make the sensors and Denso is the vendor. The problem with buying from unknown sellers is that you may not be getting a genuine-new part. If the price spread is small, I go with the Lexus/Toyota. I am even ok with a larger price difference when the expected life of part is 10+ yrs.
Salim
10-11-20, 02:03 PM
#38
Just check prices from local and on line Lexus retailers. like https://www.ebay.com/usr/belllexusnorthscottsdale.
Lexus/Toyota does not make the sensors and Denso is the vendor. The problem with buying from unknown sellers is that you may not be getting a genuine-new part. If the price spread is small, I go with the Lexus/Toyota. I am even ok with a larger price difference when the expected life of part is 10+ yrs.
Salim
Lexus/Toyota does not make the sensors and Denso is the vendor. The problem with buying from unknown sellers is that you may not be getting a genuine-new part. If the price spread is small, I go with the Lexus/Toyota. I am even ok with a larger price difference when the expected life of part is 10+ yrs.
Salim
You probably wondering why I addressed you as a friend. I had a dear close friend in my birth Country. We were soccer mates playing for many years. Thank for your faithful responses. I ordered two A/F Ratio O2 sensors for both Bank1 and Bank2 Sensor !. One sensor I purchased, the Seller posted compatibility with 2002 RX300. The other sensor is a DENSO part # 234-9021. I am planning on replacing both Bank 1 a nd Bank 2 Sensors. What I read is the DENSO work on Toyota Models such as Avalon, Camry, Sienna, and others on You Tube and no mention of RX300. In either case of the Sensor I bought from eBay one will work for my 2002 RX300. The Cost of a non-DENSO is $52 with tax. The DENSO one is $42 with Tax both new shipped from California and made in China..
I will post my findings on which sensor worked on my car.
Again, Best Wishes and Good Health to you and your Family !!
Sincerely Yours, EJ Dossary, EE
11-04-20, 11:10 AM
#39
I bought two Air/Fuel O2 sensors for my 2002 RX300 from two different Sellers on eBay. One is 234-9021 DENSO and the other is listed compatible with my RX300. My Error Code was P1135 indicating that Bank1 Sensor 1 malfunction. Taken failed Sensor proved that it was open resistance at the two Black leads. Checking the new ones indicated 1.7 Ohms which told me they might work. However, examining the connectors on the two sensors showed the DENSO on has a different connector which I ruled our not to use. The other Sensor was 100% compatible connector and wiring. Replaced the B1 S1 with the good sensor solved my problem and P1135 code is no longer displays. Happy to report this result to my member friends. Best Wishes and Health, EJ Dossary, EE
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