How to fix the p0031 on a lexus IS260, 2006 - IS 250 Lexus Cars & Trucks

P0031 Heated oxygen sensor HO2S 1 bank 1 heater control circuit low...

The main problem looks like P0306 which is a missfire on #6 cylinder. P0300 means random misfire so you may have another cylinder misfiring. How old are the plugs?
P0031, P0430 and P2238 all are related to the O2 sensors on bank 1. Which is probably caused by the misfiring of the spark plugs.
I would have the spark plugs changed first. Erase all the codes and then see what happens.

Old question that must have been resurrected by spam, but I fixed the dreadful written English tossed in some CAPS and a few SPACES! It looks pretty now.

All questions need full 'year make model', rather than 'year make, engine size'.

Anyway, there is this thing called Google. It knows everything. Here is your first code. Just copy and paste the others in and press enter.

https://www.google.com/search?q=2002+Dodge+5.2.+What+are+the+codes+P0031

What Does P0031 Mean?

The P0031 code is a result of the bank 1 HO2S1 (pre catalytic converter heated oxygen sensor) heating element having low voltage. Heated O2 sensors have a seperate heater inside the sensor to get them to operating temperature quickly.Oct 1, 2018

OBD2 Codes - P0031 - Meaning, Causes, Symptoms, & Fixes

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O2 sensor heater circuit , check fuse .
P0031 Lexus Oxygen Sensor Heater Control Circuit Low Bank 1 Sensor 1

Hi heated oxygen sensor/ 02 sensor ,bank 1. probable cause wiring short to earth ,02 sensor or ECM.

here's a link sweet melissa, P0031 Oxygen Sensor Heater Control Circuit Low Bank 1 Sensor 1

How many air fuel ratio sensor and oxygen sensors does a 2003 Lexus ES300 have and can I have a diagram of each sensor and where each sensor goes thank you

Yes the O2 sensor preheater problem will turn on the VSC light, see the complaint often, why? don't know
.P0031 TOYOTA - Oxygen Sensor Heater Control Circuit Low Bank 1 Sensor 1
In most cases the O2 being replaced cures the code but here is the full story.
Possible causes- Air-Fuel Ratio (A/F) Sensor Bank 1 Sensor 1 circuit open shorted to ground
- Air-Fuel Ratio (A/F) Sensor Bank 1 Sensor 1 circuit poor electrical connection
- Faulty Air-Fuel Ratio (A/F) Sensor Bank 1 Sensor 1 circuit
- Air-Fuel Ratio (A/F) Sensor Bank 1 Sensor 1 circuit fuse
- Faulty Engine Control Module (ECM)

P0031 - most likely pointing to a failed O2 sensor (bank 1 sensor 1 is located before the catalytic converter)

P0421 - failed catalytic converter or a failed O2 sensor

P1512 - intake manifold shutter valve is stuck - may be caused by the O2 sensor, but may not

I recommend replacing your O2 sensor first and see what happens

how to solve the problem of p0031