got CHECK ENGINE light & VSC & TRAC this am!!! (and i'm PISSED)
#31
Lexus Champion
#34
Lexus Fanatic
iTrader: (1)
Thank you RKW. It is interesting to read about it. You need to be connected to to the Lexus sever to download and update from what I understand. I don't need to update anything but if I did I would not want to risk screwing up the ECU. Even the well know Lexus independent shop in Atlanta does not perform these as they have had problems with ECU's failing during the process.
Last edited by Lavrishevo; 08-10-15 at 06:57 PM.
#36
Racer
Thread Starter
I went shopping for you:
Passenger side -
Amazon.com: Denso 234-4630 Oxygen Sensor: Automotive
Driver's side -
Amazon.com: Denso 234-4138 Oxygen Sensor: Automotive
Passenger side -
Amazon.com: Denso 234-4630 Oxygen Sensor: Automotive
Driver's side -
Amazon.com: Denso 234-4138 Oxygen Sensor: Automotive
I also ordered an offset socket thingy for $8. Hope I can make use of it. If not, just another tool in the drawer.
Here's the link to the oxygen sensor socket...
Maybe this coming weekend I'll take a shot at doing this.
#38
Pole Position
Provide the different part numbers for each different part ...
P0031 is oxygen sensor on LS - bank one sensor one. It is mounted in the manifold before the Catalytic converter. You may call it an air/fuel ratio sensor.
P0031 is oxygen sensor on LS - bank one sensor one. It is mounted in the manifold before the Catalytic converter. You may call it an air/fuel ratio sensor.
Last edited by Tom57; 08-10-15 at 07:36 PM.
#39
Lexus Fanatic
iTrader: (1)
Air / fuel sensor seems more like a generic term. As Tom mentioned, O2 sensors combined with the the engine temp sensor regulate fuel to air ratio. Post cat or downstream O2 sensors are only there for emissions. To make sure you don't remove the cats.
Engine management systems
The stoichiometric mixture for a gasoline engine is the ideal ratio of air to fuel that burns all fuel with no excess air. For gasoline fuel, the stoichiometric air–fuel mixture is about 15:1 i.e. for every one gram of fuel, 15 grams of air are required.
Any mixture greater than ~15 to 1 is considered a lean mixture; any less than ~15 to 1 is a Rich mixture – given perfect (ideal) "test" fuel (gasoline consisting of solely n-heptane and iso-octane). In reality, most fuels consist of a combination of heptane, octane, a handful of other alkanes, plus additives including detergents, and possibly oxygenators such as MTBE (methyl tert-butyl ether) or ethanol/methanol. These compounds all alter the stoichiometric ratio, with most of the additives pushing the ratio downward (oxygenators bring extra oxygen to the combustion event in liquid form that is released at time of combustions; for MTBE-laden fuel, a stoichiometric ratio can be as low as 14.1:1). Vehicles that use an oxygen sensor or other feedback loop to control fuel to air ratio (lambda control), compensate automatically for this change in the fuel's stoichiometric rate by measuring the exhaust gas composition and controlling fuel volume. Vehicles without such controls (such as most motorcycles until recently, and cars predating the mid-1980s) may have difficulties running certain fuel blends (especially winter fuels used in some areas) and may require different jets (or otherwise have the fueling ratios altered) to compensate. Vehicles that use oxygen sensors can monitor the air–fuel ratio with an air–fuel ratio meter.
The stoichiometric mixture for a gasoline engine is the ideal ratio of air to fuel that burns all fuel with no excess air. For gasoline fuel, the stoichiometric air–fuel mixture is about 15:1 i.e. for every one gram of fuel, 15 grams of air are required.
Any mixture greater than ~15 to 1 is considered a lean mixture; any less than ~15 to 1 is a Rich mixture – given perfect (ideal) "test" fuel (gasoline consisting of solely n-heptane and iso-octane). In reality, most fuels consist of a combination of heptane, octane, a handful of other alkanes, plus additives including detergents, and possibly oxygenators such as MTBE (methyl tert-butyl ether) or ethanol/methanol. These compounds all alter the stoichiometric ratio, with most of the additives pushing the ratio downward (oxygenators bring extra oxygen to the combustion event in liquid form that is released at time of combustions; for MTBE-laden fuel, a stoichiometric ratio can be as low as 14.1:1). Vehicles that use an oxygen sensor or other feedback loop to control fuel to air ratio (lambda control), compensate automatically for this change in the fuel's stoichiometric rate by measuring the exhaust gas composition and controlling fuel volume. Vehicles without such controls (such as most motorcycles until recently, and cars predating the mid-1980s) may have difficulties running certain fuel blends (especially winter fuels used in some areas) and may require different jets (or otherwise have the fueling ratios altered) to compensate. Vehicles that use oxygen sensors can monitor the air–fuel ratio with an air–fuel ratio meter.
Last edited by Lavrishevo; 08-10-15 at 08:01 PM.
#42
Pole Position
You may call it a/f sensor, but everyone else calls it oxygen sensor.
https://www.parts.com/index.cfm?fuse...MSearchResults - called oxygen sensor
- called oxygen sensor
http://www.lexussouthatlantaparts.co...946550130.html - called "sensor, oxygen"
Terminology is technically different, but everyone knows the words are synonymous and used interchangeably. The point is, the OP needs a new bank one sensor one. You are making it sound as if the OP needs a sensor other than the one to which he was directed.
https://www.parts.com/index.cfm?fuse...MSearchResults - called oxygen sensor
- called oxygen sensor
http://www.lexussouthatlantaparts.co...946550130.html - called "sensor, oxygen"
Terminology is technically different, but everyone knows the words are synonymous and used interchangeably. The point is, the OP needs a new bank one sensor one. You are making it sound as if the OP needs a sensor other than the one to which he was directed.
#43
Lexus Champion
In the LS430 repair manual, the terms AFS (Air-Fuel ratio Sensor) and Oxygen Sensor are used interchangeably. It appears that Sensor #1 (located up-stream of the CAT) and Sensor #2 (located down-stream of the CAT) are measuring and capable to produce the same "type" of output waveform. In fact, the ECM compares the 2 waveforms to determine if the CAT is doing its job (as shown below).
#44
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You may call it a/f sensor, but everyone else calls it oxygen sensor.
https://www.parts.com/index.cfm?fuse...MSearchResults - called oxygen sensor
Amazon.com: Denso 234-4630 Oxygen Sensor: Automotive - called oxygen sensor
http://www.lexussouthatlantaparts.co...946550130.html - called "sensor, oxygen"
Terminology is technically different, but everyone knows the words are synonymous and used interchangeably. The point is, the OP needs a new bank one sensor one. You are making it sound as if the OP needs a sensor other than the one to which he was directed.
https://www.parts.com/index.cfm?fuse...MSearchResults - called oxygen sensor
Amazon.com: Denso 234-4630 Oxygen Sensor: Automotive - called oxygen sensor
http://www.lexussouthatlantaparts.co...946550130.html - called "sensor, oxygen"
Terminology is technically different, but everyone knows the words are synonymous and used interchangeably. The point is, the OP needs a new bank one sensor one. You are making it sound as if the OP needs a sensor other than the one to which he was directed.