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24/07/2024 1:31 pm
Topic starter
Hello
How are you?
I am following from Oman
I have 2003 lexus GX470 with 298000 miles
I have rich condition in both banks
P0172
P0175
Any thoughts ?
Maf sensor is new oem
I checked Hoses it's good
Injectors are tested okay
I have these codes p0172 and p0175 for 7 months and only long fuel trim readings are not okay it shows -10, -15,-20,-25 and -30 in different drive conditions
Short fuel trim seems like normal almost between ±5
Also in the morning when i start engine there's weird sound for while then it goes
I try to figured out but i couldn't
How can i rule out fuel pressure regulator and air intake blockage ?
Thank you for your efforts
2 Answers
1
24/07/2024 4:06 pm
Check fuel pressure with a gauge. Check upstream O2 sensor output. It's also possible you have drippy fuel injectors.
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25/07/2024 9:25 am
Topic starter
Sorry it's 192000 miles not 298000