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New User Engine Error Codes.

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Old Jun 21, 2018 | 04:31 PM
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Exclamation New User Engine Error Codes.

Hello all
I'm new to Club Lexus and car maintenance, in general, I've currently only managed to change the bulbs in the headlights and changed a tire but that's as far as I go in terms of car knowledge. My car is a Lexus RX300 from 1999 with 112k miles on it.
The primary reason I am writing this post is that I hope to do the repairs if possible myself. Last time I had an error it was a CO2 sensor and it cost over 800$ from the dealership to do the repairs so i would like to avoid the dealership if possible. That being said should I be worried about driving the vehicle at all? It is my only vehicle which I use to drive from work, school, and home.
The currently reported errors are 11 consisting of
P0171
P0125
P1135
In terms of a service manual or the like, I don't have any as the original was lost in a house fire several years ago. I would like to attempt to fix these myself if a video or something along those lines is available.
Sorry if this in the wrong location or missing information any advice and information are welcome.
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Old Jun 21, 2018 | 05:04 PM
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You have 11 codes or just the ones you posted?
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Old Jun 21, 2018 | 05:13 PM
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Welcome to Club Lexus.

Please read the sticky threads and specially the one titled Having problems, start here.

To do any DIY, you would need the understand safety and acquire tools. Usually this build up discourages folks from undertaking DIY. Other thing would be to work with a friend who can show + teach you stuff. Internet videos some times over simplify things or gloss over details.

Please clear all codes and then fix the first (or first few) on the onset of an error code.

Salim
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Old Jun 21, 2018 | 05:23 PM
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Originally Posted by carguy07
You have 11 codes or just the ones you posted?
It reported 11 errors which were a various mix of the 3 codes just repeated
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Old Jun 21, 2018 | 06:39 PM
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Originally Posted by will309pro
It reported 11 errors which were a various mix of the 3 codes just repeated
Don't know what that means. As advised, clear the codes and see what pops first.
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Old Jun 21, 2018 | 08:39 PM
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Originally Posted by maxSteel
Don't know what that means. As advised, clear the codes and see what pops first.
In order of reporting these are the errors, I revisited my local auto parts store sorry it took so long.

P1135
P0171
P0125
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Old Jun 22, 2018 | 03:53 AM
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Bank 1 Sensor 1 (the one close to the firewall in the exhaust manifold) https://www.clublexus.com/forums/rx-...el-sensor.html
Buy a Denso part from a reputable seller. Denso part number is 234-9009
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Old Jun 22, 2018 | 01:17 PM
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Originally Posted by carguy07
Bank 1 Sensor 1 (the one close to the firewall in the exhaust manifold) https://www.clublexus.com/forums/rx-...el-sensor.html
Buy a Denso part from a reputable seller. Denso part number is 234-9009
Alright I've ordered the new sensor on Amazon should be here within a few days.
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Old Jun 22, 2018 | 09:35 PM
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Originally Posted by will309pro
Alright I've ordered the new sensor on Amazon should be here within a few days.
Given that ive ordered a new sensor should fixing this fix the other two errors or it is down to a process of replacing and compare results?
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Old Jun 23, 2018 | 05:27 AM
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The other codes will very likely go away after replacing the air fuel sensor. They are usually "companion" codes.
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