Code P1130 won’t go away after changing the sensor and clearing the code.

Got got P1130 on 2001 Tacoma and changed the sensor with the original denso part number

$142 234-9002 Air Fuel Ratio Sensor

234-9002 because it is an automatic 2.4L. The light still came on even after clearing it with a code reader. I don’t know if it’s a vacuum line causing this or an electrical issue. The photo attached is of the new sensor.

 

Try cleaning your maf sensor.

 

The P1130 is too rich of a fuel mixture, a dirty MAF misreporting airflow could be it and as suggested above, I would test it, then clean it, then test it again. Before you go down that rabbit hole what scan tool do you have? The reason I ask is that a good quality scan tool will alow you to get live data in both OBDII and manufacturer specific mode. If possible, test in generic OBDII mode and then in manufacturer specific. You want the data in g/sec (grams per second) and the rule of thumb is that at idle there should be 1 g/sec of airflow for each liter of dispalcement, this is kind of a go-no go type of test.

 

I used a O’Reilly scan tool to check the code before I got a little smart gauge tool that works as a scanner and it also clears codes. I’ve cleared the light a couple times and it keeps coming back and right now it threw the code P1133. It’s not really a detailed scan tool it just shows what code it is and clears codes.

 

This is how my MAF sensor is looking

 

Check intake for leaks 1st
Can use chlorinated brake clean, sprayed on intake while engine running. If idle jumps/rises…..there’s your leak

 

P1133:


Hmmm
This new code points to a bad ‘new’ sensor possibly (IMO doubtful)
Or
Wire(s)/harness/pigtail issues

check/inspect all wiring from O2 up….including the pigtail plug

 

Also I found out that the little gauge cluster can read MAF rate and got this info down before I clean it.

 

I’ll also check the wiring and intake

 

Do you have the freeze frame data?
To figure this one out, you need to monitor or see the voltages of the A/F sensor.

 

I do not have the freeze frame data.

 

I think the oxygensen V-12 is the voltage of the sensor at idle.

 

You need to be moving at least 38 mph, and the RPM need to be 1500 or more.
Monitor the Voltages. If they never move off of .77 then you need to have a look at the wiring.
Or a bad sensor.....but they don't typically fail in an open/short fashion. Especially on a NEW sensor.

 

Yea I was driving around and it never went over 1.00.

 

12 I'm pretty sure is the downstream sensor, 0.7v is about right for the downstream sensor reading. Not sure why your tool isn't reporting the upstream (11) reading.
The upstream (AFR) sensor should be in the 0.5-5v range with center (14.7:1) being about 3.3v which is where it should hover around except during decel (should go high) or hard acceleration (should go low).
Note that generic OBD data may display it as a standard O2 sensor voltage range of 0-1v but the voltages would be inverse of a normal O2 sensor.

 

I wasn't sure what his scan tool was reporting.
I seen Pos1 and OSS1 and I'm not familiar with those terms.
I assumed B1S1????

 

Beats me but the reading it is displaying (0.77v) is a plausible reading for the downstream sensor.

Generic OBDII Data doesn't tend to do well displaying values for AFR sensors especially on older vehicles anyway, you typically have to look at the OEM data side to see them properly.

 

Yea that was the only reading for O2 sensors so I assumed it was the upstream one because it’s under the Oxygensen POS 1 but maybe I could try getting the reading from another scan tool so see the voltage reading from the upstream one.

 

Also I got the truck like 2 weeks ago and I just realized today while cleaning the MAF that this part that’s connected to air box is missing 2 10mm nuts so there could possibly be an air leak there.

 

Certainly isn't helping anything but I doubt it's causing your code.