2000 Es300 Vsc And Engine Lights On

[tanvet]

just changed the bank 1 sensor ,error code po171,lights were off for a week or so ,now they are all back on,vsc on and off lights and engine light,what else am i looking for?

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[vetmx1]

check the codes again. see what comes up.

my2000 es300 had cel and vsc lights. i forget the codes, but turned into the charcoal canister.

something like $230 and 2 hours on the ground, but the lights are gone.

used lexus of brookfield, wi for parts.

[Lexlogic]

just changed the bank 1 sensor ,error code po171,lights were off for a week or so ,now they are all back on,vsc on and off lights and engine light,what else am i looking for?

I don't know if this would help Click here

Causes A code P0171 may mean that one or more of the following has happened:

The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.

There could be a vacuum leak downstream of the MAF sensor.

Possible SolutionsPossible solutions include:

In the vast majority of cases, simply cleaning the MAF sensor does the trick. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling

Inspect all vacuum and PCV hoses, replace if necessary

Check for a dirty fuel filter and proper fuel pressure