This article will help you to diagnose diagnostic trouble codes P0171 (System Too Lean Bank 1) and/or P0174 (System Too Lean Bank 2).
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Resources for Lexus drivers such as owner's manuals and warranty information.
Could be the wires, although my wires are fairly new AC Delco wires with about 50,000 mostly highway miles on them.
MAF Sensor values on Scanner Venture Car Forums.
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Technical Service Bulletin Group ENGINE ELECTRICAL Number 04-36-020 Subject 2001 – 2005 XG300/350 P0171, P0174 (SYSTEM TOO LEAN BANK 1/BANK 2) Date DECEMBER, 2004 Model 2001 – 2005 XG300/350 DESCRIPTION: If a 2001 XG300 or 2002 – 2005 XG350 sets codes P0171 and or P0174 (Hi-Scan Pro description is: “System too Lean Bank 1/ System too Lean Bank 2”), perform ….
Find your “engine failure” according to your vehicle OBD code.
It indicates an Evaporative Emission Control System Incorrect Purge Flow. The P0441 OBD-II code is relatively rare (at least for Toyotas). Hoping to get some advice- check engine light with a P0174 - Bank 2 running lean- when i erase the code, it will run fine until about 120 miles then it. P0171 Bank 1 too lean P0174 Bank 2 too lean P1083 Fuel control limit too lean Bank 1. I took the car to the local auto store and pulled these codes from it.
I recently my "Service Engine Soon" light is on.
If the problem persists the front oxygen (O2) sensor may need to be replaced. If there are no intake leaks, the next step is to replace the air filter and clean the air flow meter.
If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak.
Used to power the Toyota Tundra, Sequoia, Land Cruiser, and 4Runner in addition to the Lexus GX470 and LX470, this V8 is ridiculously reliable.
The Toyota and Lexus 2UZ-FE 4.7L V8 is the gold standard of reliable, mid-sized iron block V8s.
On V6/V8/V10/V12 engines, Bank 2 is the side of the engine that.
Basically this P0174 code means that the upstream oxygen sensor in bank 2 reporting a lean condition (too much oxygen in the exhaust).