Check engine light, code PO171, GS 400 need help
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Check engine light, code PO171, GS 400 need help
My 99 GS 400 is having a problem with O2 sensors. The check engine light comes on with PO171 Bank 1 code. I changed out all the O2 sensors, But the check engine light won't go off and it's still showing the same code, PO171 bank 1. I also failed the smoke check. Any advise and suggestion is Greatly appreciate. Thank you.
#3
Some of the other things are:
Air induction system
Injector blockage
Mass air flow meter
Engine coolant temp. sensor
Fuel pressure
Gas leakage on exhaust system
Open short in heated oxygen sensor (bank 1, 2 sensor 1)
circuit
Heated oxygen sensor (bank 1, 2 sensor 1)
ECM
Did you reset your CEL or give it time to cycle itself off?
Air induction system
Injector blockage
Mass air flow meter
Engine coolant temp. sensor
Fuel pressure
Gas leakage on exhaust system
Open short in heated oxygen sensor (bank 1, 2 sensor 1)
circuit
Heated oxygen sensor (bank 1, 2 sensor 1)
ECM
Did you reset your CEL or give it time to cycle itself off?
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