P1131 error code

Tiny
WARREN1814
  • MEMBER
  • 2000 FORD E-SERIES VAN
  • 4.2L
  • V6
  • 2WD
  • AUTOMATIC
  • 160,000 MILES
Hello, its just me Warren. And I am sorry if I posted this in the wrong section of the site. I looked for it on here but I couldn't find it. Well anyway here is my question. I just ran a scan on my van and it produced the error code P1131. And I just wanted to ask this question. Should I go ahead while I have the chance to really replace my intake manifold gasket and my spark plug wires and spark plugs all at the same time. Should I go ahead and have this done and will it get rid of this P1131 error code that I am having?
Wednesday, August 25th, 2021 AT 9:22 AM

30 Replies

Tiny
JACOBANDNICKOLAS
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Hi, Warren.

I looked that code up based on the vehicle information you mentioned and the code doesn't exist for this vehicle year/model.

On Ford vehicles, a P1131 is related to an upstream heated oxygen sensor. So, I need some clarification on what is happening because a heated O2 sensor really had nothing to do with the intake or a tune-up.

Let me know so I can help.

Take care of yourself.

Joe
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Sunday, August 29th, 2021 AT 7:46 PM
Tiny
WARREN1814
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Well, hello Joe.

Well, in the past I have changed the o2 sensor a lot. And I have even replace the mass air flow sensor a lot too (I was so used to replacing that I have a extra one sitting on my desk now, lol). When I read my scanner it said something like power train and then it had the code P1131. And like you said in my van repair book it doesn't even have this code written in there unless I over looked it. So just out of frustration alone I cleared the code just to see if it would come back again. I drove it to church etc and it didn't come back on, at least not yet anyway. I was told by many that it could be the intake manifold gasket needs to be replace etc. But if you and others on here don't think I should have it replaced then I won't. I know some people now that said they would do it for $500.00. Well, here is what happened: well, as some of you know I am in a wheelchair and I have this lift on here and it has been giving me some trouble here lately so I had to park my van for a week. So my van has been sitting that long. I drove it yesterday and check engine light came on as well as the ABS light came on too. The ABS light started coming on first and then the check engine light came on and it produced that error code I was telling you about. That's all that happened basically in a nut shell.
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Monday, August 30th, 2021 AT 9:14 AM
Tiny
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Hi,

The ABS could be a wheel speed sensor, low brake fluid, or a wiring issue. If the light is on, the ABS won't work. You will have traditional non-ABS brakes.

Now, the intake is something different. If the concern is a possible vacuum leak, which is about all that can happen, there are two ways to check it before spending the money to replace it.

First, you can simply check for a leak. Here is a link that shows how it's done:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

The second thing you can do is this. You mentioned that you have a scanner. If the scanner can read live data (while the engine is running), see what the short-term fuel trims are. By nature, they will jump around a bit. In a perfect world, they would be 0%. If you find they are in the positives above + 10%, that indicated the computer is trying to add fuel to a lean mixture. The lean mixture could indicate a vacuum leak and it could be at the manifold.

I hope that helps. Let me know if you have other questions or if there is something I can do to help.

Take care,

Joe
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Monday, August 30th, 2021 AT 5:40 PM
Tiny
WARREN1814
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Well, I checked the brake fluid level and that is fine. It could be the other two things you said. I notice when I gently put on the brakes until I come to a complete stop the ABS light won't come on. But if I have to slam on the brakes come on it comes on (that's why they call it the ABS system I guess etc). Anyway I have a scanner but it's not one of those fancy kind. It only reads the codes and not live data. I need to get one of those kind too. Far as the check engine like goes I drove it yesterday and it didn't come on at all (smh). Glad it didn't come on but don't know why it came on last week. Far has finding any vacuum hoses loose or cracked all of that has been fixed. Now being in a wheelchair I have no idea that they are really fixed but the repair guy told me that they where etc, (most frustrating). Looks like I will have to get myself a scanner like that so that way I can really check and see for myself what is going on / have way know what is happening anyway. Any idea what is a good model of scanner I could buy?
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Wednesday, September 1st, 2021 AT 10:37 AM
Tiny
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Hi,

What I suggest is getting a scanner that can read OBD2 codes and the CAN. CAN stands for controller area network. Basically, all the computers/modules are tied together via a few wires. This type of scan tool can read codes regardless of the module storing them.

I'm suggesting this type because chances are you will be keeping it for years. The newer the vehicle, the bigger the CAN system. So, this will be something functional for years to come.

I looked on Amazon, and they aren't too expensive at all. Here is one I found that offers a lot of options. There are cheaper ones too. I don't own this one, but for the price, it appears to do a lot.

https://www.amazon.com/Bosch-OBD-1100-Scan-Tool/dp/B082JQSN3R/ref=sr_1_41?dchild=1&keywords=auto+scan+tool+can&qid=1630550648&sr=8-41

Let me know your thoughts or if you have other questions.

Take care,

Joe
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Wednesday, September 1st, 2021 AT 7:46 PM
Tiny
JACOBANDNICKOLAS
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Hi:
What I suggest is getting a scanner that can read OBD2 codes and the CAN. CAN stands for controller area network. Basically, all the computers/modules are tied together via a few wires. This type of scan tool can read codes regardless of the module storing them.

I'm suggesting this type because chances are you will be keeping it for years. The newer the vehicle, the bigger the CAN system. So, this will be something functional for years to come.

I looked on Amazon, and they aren't too expensive at all. Here is one I found that offers a lot of options. There are cheaper ones too. I don't own this one, but for the price, it appears to do a lot.

https://www.amazon.com/Bosch-OBD-1100-Scan-Tool/dp/B082JQSN3R/ref=sr_1_41?dchild=1&keywords=auto+scan+tool+can&qid=1630550648&sr=8-41

Let me know your thoughts or if you have other questions.

Take care,

Joe
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Wednesday, September 1st, 2021 AT 7:46 PM
Tiny
WARREN1814
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Oh, thank you so much. And I can just afford that one too. I will have to order that ASAP. That should help a lot and yes, I plan on keeping it for a very long time. In fact my check engine light just came back on again today too.
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Thursday, September 2nd, 2021 AT 12:11 PM
Tiny
JACOBANDNICKOLAS
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Hi Warren,

You are very welcome. Let me know what you find and what I can do to help.

Take care,

Joe
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Thursday, September 2nd, 2021 AT 6:52 PM
Tiny
WARREN1814
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Okay, I sure will let you know what I find out. Soon I will have the scanner on order so hopefully it shouldn't take too long to get here. In the mean time the check engine light went back off on its on again. I plan on doing a scan when the light is off and on and see what it tells me once I get the scanner. Anyway, thank you for helping me once again.
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Sunday, September 5th, 2021 AT 11:29 AM
Tiny
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Happy to help. I hope you have a good Labor Day.

Joe
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Sunday, September 5th, 2021 AT 6:38 PM
Tiny
WARREN1814
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Sorry guys for such a late reply. My wheelchair frame broke so I had to get that fix. I had this guy that said he didn't know how to weld aluminum, but he could find someone that could, and he would get back to me when I would hear from his friend. But no response. So, I had to find someone who knows how to weld aluminum (tig welder). So finally, I find one and got that fixed. Far as getting my scanner goes I haven't had the chance to order that yet because of that etc. And the P1131 code has gone off and come back on since I last checked in with you guys. But anyway, that's where things stand at the moment. :-( And again sorry for such a late reply. Hope you guys had a great Labor Day weekend.
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Tuesday, October 12th, 2021 AT 12:27 PM
Tiny
JACOBANDNICKOLAS
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Hi,

Good to hear from you. I hope everything is okay now. As far as the issue, I found info on the code in a different manual. The only concern is it jumps all over the place as far as diagnostics based on if other codes are found.

If you look below, I attached an example of what I'm referring to. Look at the end of the check and note it says go to a different test based on different variables.

Are you expecting to get a scanner soon?

Let me know.

Joe

See pics below.
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Tuesday, October 12th, 2021 AT 5:12 PM
Tiny
WARREN1814
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Hi,

Wow! I have never seen anything like that before. I had no idea that kind of test could be performed on a vehicle. The page in the middle that you are providing is very helpful but I don't know of anybody smart of enough to perform that test on my van, lol. And I can't reach it to perform it myself etc. Also too since the last time I wrote you guys the check engine light went back off again. Something isn't right. But I sure need to find out what. And far as the scanner goes. I plan on ordering it as soon as possible / hopefully before something else pops up. I will let you know as soon as it arrives. Surely this scanner will pen point something. Also, if someone doesn't mind could someone please tell me how many o2 sensors does a 2000 Ford e150 v6 4.2l van suppose to have. A friend of mind says it has 4 but I thought it only has 2.
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Friday, October 15th, 2021 AT 10:31 PM
Tiny
JACOBANDNICKOLAS
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Hi,

It should have four. I attached two pics below. The first is a pic of the exhaust system. I highlighted four places to check.

If they are there, then look at pic 2. It identifies the sensors positioning. I placed a B1 and B2 on the page. That stands for bank 1 and bank 2.

Now, there are two sensors for each bank. They are identified as

HO2 11 and HO2 12 and HO2 21 and HO2 22. The first number identifies the bank (engine side), and the second number is which sensor, the first or second from the engine.

To determine which one needs to be replaced, you need to know if it is bank 1 or 2 (handwritten) and then if it is sensor 1 or 2. For example, bank 1 sensor 1 would be the one I circled in blue.

I hope this helps. Let me know if you have other questions.

Take care,

Joe

See pics below.
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Saturday, October 16th, 2021 AT 6:30 PM
Tiny
WARREN1814
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Hello there. First I must say I love how you did your diagram. It was easy to follow. But I do have a question. In picture 2. The one you drew the blue circle around. Say for example if I was sitting in my van behind the steering wheel facing the front of my van the sensor labeled HO2S-11 would be on the passenger side of the van, correct? If so I have always thought that the driver's side of the van is where bank 1 was located. Also, by the way someone hooked a very low budget scanner to my van and the error code they come up with was the same p1131, but it also said it was upstream 02 sensor Bank 1. And if that is located in the where I think that is located in the photo I am going to try and upload on here. That sensor looks as though it has never been changed ever! But the one in your diagram that says HO2S-21 has been replace. I will up load the photo. In the picture where you see my hand is lol the little red arrow points to the o2 sensor (on the passenger side of the van if you are sitting in it). That looks like it has never been changed ever. HO2S-22 and HO2-12 I can't see them at all of course etc. And in the picture that doesn't include my hand in it. You can see that one has been replaced. Because it looks new and everything etc.
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Thursday, October 21st, 2021 AT 12:33 AM
Tiny
JACOBANDNICKOLAS
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Hi,

Yes, the passenger's side of the vehicle is where bank 1 is located. Bank 1 contains cylinder 1. If you look below, there is a pic that shows cylinder locations. I placed a B1 and B2 to identify banks.

As far as the "upstream" sensor, that is correct. Sensor 1 is always upstream from the catalytic converter. Downstream will be after the converter.

If the pic with your hand in it is the left side of the engine, and I think it is, that is bank 1 sensor 1 that you say looks new. If it is, we need to get our hands on a live data scanner so we can determine if the sensor is good.

Let me know,

Joe
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Thursday, October 21st, 2021 AT 7:02 PM
Tiny
WARREN1814
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Hello there. well, no, the picture with my hand in it shows that it hasn't been touched. It's very old, it looks as though that thing has been there since the van was made, lol. Anyway, i am glad you brought up the scanner thing. Some said they may help me get a scanner and i was wanting to ask is this one right here a step up from the one you picked? https://tinyurl.com/3nj9f6y3 just asking is because i have never bought a scanner before etc. I want to get the best model i can for under $200.00 etc
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Friday, October 22nd, 2021 AT 8:59 AM
Tiny
JACOBANDNICKOLAS
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Hi,

That looks like it would do a lot for you. However, I don't see anything that indicates it can read the CAN. Since this is a tool you will have for a long time, the newer the vehicle, the more you need the CAN diagnostic option. If I haven't mentioned it before, CAN stands for controller area network. This is a network made up of a few wires that attach all the modules/computers together. This type of scan tool should be able to retrieve codes from any module on the vehicle. I only mention this because as mentioned, you'll have it for a long time. As you get newer vehicles, the more likely this option will be needed or appreciated. LOL

Let me know if you have questions or if there is something I can do to help.

Take care of yourself,

Joe
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Friday, October 22nd, 2021 AT 8:39 PM
Tiny
WARREN1814
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Well as I said I have never order one of these before so. Lol It's fine by me getting the scanner you talked about. Spending less money is okay with me. Lol Well I will let you know when and if it arrives.
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Sunday, October 24th, 2021 AT 1:39 PM
Tiny
JACOBANDNICKOLAS
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Hi,

I look forward to hearing from you. Also, in my mind, you will be happy to have one that can read the CAN-bus. If not today, in a few years from now. It certainly isn't going away. LOL

Take care.

Joe
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Sunday, October 24th, 2021 AT 6:09 PM

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