Check Engine Light On Es 300 1996 Code Po171b

kwietone · July 10, 2008

When I bought the car, the private seller told me that when the light is on, that means the engine is good ' I'm just kidding'

Seriously though, my check engine light is on.

The code from One shop is P0171 - System Too Lean Bank 1

Another shop PO171B - assuming it's the same code

Any possible clues as to what could be the cause of this problem?

Jesus · March 18, 2009

When I bought the car, the private seller told me that when the light is on, that means the engine is good ' I'm just kidding'
Seriously though, my check engine light is on.

The code from One shop is P0171 - System Too Lean Bank 1

Another shop PO171B - assuming it's the same code

Any possible clues as to what could be the cause of this problem?

I just took my car to have a check engine light diagnosed and it also came back with a P0171b code. The mechanic found that it was just a cable related to the vacum system that was unplugged under the engine cover. Once he plugged it back the check engine light disappeared and the error went away. I hope this helps.

sali47 · March 18, 2009

When I bought the car, the private seller told me that when the light is on, that means the engine is good ' I'm just kidding'
Seriously though, my check engine light is on.

The code from One shop is P0171 - System Too Lean Bank 1

Another shop PO171B - assuming it's the same code

Any possible clues as to what could be the cause of this problem?

hi there!

system too lean bank 1 sometimes means its an 02 sensor, which is highly possible in most japanese vehicles like lexus, toyota, honda, nissan, and acura.

however, you should not go by just the obd 2 code "p0171", because it gives you a general idea of where the problem exists.... especially if you're using a generic code reader.

if you're using a code reader for lexus, it may give you a more specific code.

not knowing what you used and how many miles are on it, you could take this to the dealer and have it fixed under the maintanence warranty for emissions, since this could be an emissions related issue.

good luck,

Ali