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P0172 LEXUS - System Too Rich Bank 1
Possible causes
Faulty front heated oxygen sensor
Ignition misfiring
Faulty fuel injectors
Exhaust gas leaks
Incorrect fuel pressure
Faulty Mass Air Flow (MAF) sensor https://www.autocodes.com/p0172_lexus.html
code p 0332 refers to knock sensor(KS) 2 banbk 2--low input===causes --insecure KS--poor connections ---wiring short to ground--KS incorrectly tightened---KS---ECM
You have to reset the check engine light. It will erase all the bad codes that you have fixed. To do this, you have to remove the positive battery cable for a minute or so and reconnect. It should clear the check engine light..
p0172 is--system to rich ( bank 1). an oxygen sensor on bank 1, detected a rich condition ( to little oxygen in exhaust ) v6-v8 - v10 engines, bank 1 is the side of the engine that has # 1 cylinder. causes could be a vacuum leak in a hose, a dirty or bad maf sensor, or fuel pressure or delivery problems.
Have a good look at filler pipe under, follow from fill door to tank & look for a kink in any hoses. Only other thing is it possible someone dropped something down the filler pipe?
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