Extracted codes P1130 & P1135 on a 2000 Toyota Avalon XL. From my research this points to a malfunctioning O2 sensor, but no generic error codes identifying which bank. I noticed that there are error codes P1150 & P1155 which identify the same problem. I assume that I have 2 O2 sensors before the cat that these codes (P1130,P1135)refer to those 2 sensors and not the 2 O2 sensors after the cat. Can you shed any light as to which sensor?
My '96 Avalon came up with a bad O2 sensor code and it turned out to be just the gas cap. I replaced it and everything has been fine. It's worth a shot before spending the bucks for a new sensor.
My '96 Avalon came up with a bad O2 sensor code and it turned out to be just the gas cap. I replaced it and everything has been fine. It's worth a shot before spending the bucks for a new sensor.
Sorry your Avalon did not have an o2 sensor code that you corrected with a gas cap. You may have put another gas cap on it and the o2 sensor may have had an intermittent problem that is working for the time being. But you did not fix your o2 sensor by installing a new gas cap.
__________________
Master Toyota Tech
ASE Master Tech
Shop Foreman
16 years with Toyota
[quote=lax20cos;917386]Extracted codes P1130 & P1135 on a 2000 Toyota Avalon XL. From my research this points to a malfunctioning O2 sensor, but no generic error codes identifying which bank. I noticed that there are error codes P1150 & P1155 which identify the same problem. I assume that I have 2 O2 sensors before the cat that these codes (P1130,P1135)refer to those 2 sensors and not the 2 O2 sensors after the cat. Can you shed any light as to which sensor?[/quote
You will need to replace your air fuel ratio sensor (O2 SENSOR). It is bank 1 sensor 1. This is the sensor before the converter on side of the engine closest to the firewall. If you chose to do it yourself lay on the top of the engine and look down the back of it you will see the sensor. The only tool need is a 22 mm wrench. Go slow and make sure it is straight. If you try to pull it out at any sort of angle it will freeze up and not come out without a major fight.
One thing before you do this because it has 2 codes for the same sensor make sure it is plugged in first.
__________________
Master Toyota Tech
ASE Master Tech
Shop Foreman
16 years with Toyota
I will paste below an entry I put up on this FORUM a while back regarding my experience and knowledge about O2 sensor/replacement. Hope this helps as if you can diagnose and repair the problem, you will save yourself a lot of money.
-----------------------------------------------------------
had check engine light on in my 2002 Avalon XLS. Researched out codes and function of A/F O2 sensors and fixed the problem. Remember however it is for a 2002 Avalon not your year but may give you some clues.
Fuel mixture control is combination of conditions that include O2 sensing, and temperature. Your P0125 seems to say engine is not warming up enough to operate from an open loop condition to a closed loop condition. What is you temp. gauge say? Is it below normal operating temp could be a thermostat stuck open. Open loop engine runs in this mode until water temp reaches max operating temp, and O2 sensor heats up enough to operate (about 1800 degrees), etc. The car computer uses a table look up method to define mixture. So this is not very accurate, and you burn more gas and possibly screw up your cat. Converter. Closed loop it uses all of its sensor input to accurately define the mixture, so you should be getting about 29mpg.
The O2 sensor senses O2 in exhaust, plus there is a heater in it to bring it up to temp fast so engine runs in closed loop mode quicker. Your P1135 seems to say one of you A/F O2 sensor (heater) is bad. I had TWO bad sensors open heater circuits - in my car at 106,000 miles, which is about when these start to fail. P1133 and P1135 is O2 response time - but may be caused by defective heater. Either way - the A/F O2 sensor is suspect.
The error code P1155 and P1135 and resulting check engine light is due to failure of one or more A/F Sensors (Air/Fuel sensor, or sometimes called Oxygen Sensor). There are three in my 2002 Avalon. There are two parts to the sensor - a heater that heats up the sensor quickly, and the Oxygen sensing part. The error code says you have a problem with the heater. Your mileage after warm up should be normal if O2 part is working OK. If you get consistent bad mileage, I would get it fixed ASAP as an over rich mixture will shorten the life of the CAT converter.
SENSOR TYPES (at least on my 2002) Bank2 Sensor 1 - front of engine exhaust manifold
Toyota part 89467-41040 by DENSO. OEM equiv. Denso 234-9021 Heater resistance check at 68 degrees F 0.8 to 1.4 ohms Bank 1 Sensor 1 - rear engine exhaust manifold
Toyota part 89467-41030 by DENSO. OEM Equiv. DENSO 234-9021
Cost of these about $180 each - find via google search. Toyota price
about $230 each.
Heater resistance check - same as above Bank 1 Sensor 2 - under car in back of Catl. Converter, Connecter under
passenger front seat.
Toyota part 89465-07040 by DENSO. OEM Equiv. DENSO 234-4061
OEM part costs about $83. heater resistance check at 68 degrees F. 11 - 16 ohms.
You need to unplug each sensor, and test resistance reading between the two terminals in sensor plug that have the two black wires into plug. This will check if the heater in the sensor is open or shorted. Resistance readings are as shown above. You will probably find one or more that have failed. I had two out of three bad!!!! (106K miles on car)
The front sensor - easy to get to and remove. The rear one - you can fish your hands down from the top by fire wall to unscrew and disconnect. The one by the cat. Converter - remove four bolts holding passenger seat, lean it back out of your way. Pull carpet out from under the plastic on the center console, pull out as best you can, you will see the sensor connector and the wires coming through the floor board. Disconnect the connector, and push the rubber grommet out the hole - then you should be able to unscrew the sensor from under the car.
This procedure is a guide only - you are on your own. One needs to be fairly mechanical to pull this off... Good luck. Hope this helps
Check Engine Lamp
Linear Mode
