jgkolt
Premium
join:2004-02-21
Lakewood, OH
clubs: | reply to 3SGTE
Re: [Help] 1999 Lexus ES300 "vsc activity light" and "vsc off" l
What do you mean I did myself a disservice? What would I have done better. Odbc code was P0171
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3SGTE
ST215W
Premium,MVM
join:2000-11-23
there
clubs:
| If you installed a conventional O2 sensor where the A/F sensor goes (they are the same basic size and shape), then you did yourself a disservice.
In addition, the most common cause of P0171 on those is an airflow meter. It is often associated with lack of power and pinging.
What are the current DTCs?
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jgkolt
Premium
join:2004-02-21
Lakewood, OH
clubs: | The error code is P0171 which says bank 1 reports too lean. That's the only error codes the scanner at autozone came up with.
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3SGTE
ST215W
Premium,MVM
join:2000-11-23
there
clubs: | Where did you get the replacement part that you installed?
If possible, please tel me the part number, I would like to check if it is correct. |
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jgkolt
Premium
join:2004-02-21
Lakewood, OH
clubs:
edit:
July 14th, @07:17PM
| I purchased the replacement part from autozone and it was the bosch 15217 oxygen sensor. I replaced the back o2 sensor (back of engine before cat) but not the front one side o2 sensor (also before the cat). Maybe I need to replace the front one. I dont hear any suction as if it was a vacuum leak. I am not sure how to check the vsc codes as you mention. The only codes i have is when autozone hooked up the odb2 scanner to the car and it only read "the PCM has determined that during testing the fuel system for bank 1 was too lean." P0171. Is there 2 different types of codes i should check?
»www.obd-codes.com/p0171
It is nice to know the vsc disables if there is an engine malfunction. Since I didn't see any codes for vsc i hope it is just this one error code problem talking about it running lean.
I don't mind working on cars but I am no expert so bear with me.
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3SGTE
ST215W
Premium,MVM
join:2000-11-23
there
clubs:
| It appears that Bosch specifies that as a wideband type sensor.
Theoretically, it should work.
They are a step more precise than conventional o2 sensors, so hopefully the vehicle can handle the non-OE part.
You need to find either of the connectors shown in the previous post and connect the indicated terminals. Then count the flashes of the VSC light.
DLC1 is located under the hood.
DLC2 is located above your ankles (above the pedals).
As for the lean condition, I am afraid the next step isn't that easy.
You need to check some of the live data values in the engine control computer while the engine is running. (Short and long term fuel trim values) If they are both high (say over 20%), (bank one and bank two), then it is something common to both banks that is the cause. It is a fairly good bet that your airflow meter is inaccurately measuring the amount of incoming air.
The easiest method of confirming this is to swap in a known good part and re-roadtest the car. The difference is usually readily apparent via increased power and changed data list values. There are additional tests that can be performed, but a known good part and recheck is by far the quickest and most definite method of confirmation.
Some report success using a spray cleaner to clean the airflow meter, some do not. Replacement may be necessary if that is the problem.
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