Downstream oxygen sensors. Truck was running rough this morning. Obviously replace those. Maybe have to replace cats as well?

2017 Nissan Titan - 82000 miles.

Post the freeze frame data here.

What is your LTFT and STFT?


Unlikely both rear sensors crapped at the same time.

I don't have an OBD reader - just got the codes from the onboard diagnostic.

I'm going to pick up a OBD scanner.

What is a good OBD scanner? Lost my old one

MAF sensor failure?

I'm just kinda spitballing here, but would you think that a failure of the MAF sensor would generate a code related to the MAF sensor?

Silvy said:

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I'm just kinda spitballing here, but would you think that a failure of the MAF sensor would generate a code related to the MAF sensor?

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No, I don't think there is such a code. If both banks are coded, I look for something that impacts both banks. MAF sensor or evap leak or something of the such.

austinag1997 said:

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Silvy said:

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I'm just kinda spitballing here, but would you think that a failure of the MAF sensor would generate a code related to the MAF sensor?

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No, I don't think there is such a code. If both banks are coded, I look for something that impacts both banks. MAF sensor or evap leak or something of the such.

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Seems like you were right. I cleaned the MAF, (had disconnected the battery before), reconnected, and everything runs fine right now.

I also changed out the air filter; I got my oil changed yesterday, and I now remember that the dumbass mechanic said my air filter was dirty, and he had blown it out; thus, he likely got some debris on the MAF, causing my issue.

I had been going to this shop just for oil changes because my old mechanic used to work there and run the place, but he recently retired, and the service has obviously gone downhill. Obviously, I need to find a new mechanic.

Glad you got it running!

zooguy96 said:

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austinag1997 said:

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Silvy said:

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I'm just kinda spitballing here, but would you think that a failure of the MAF sensor would generate a code related to the MAF sensor?

---

No, I don't think there is such a code. If both banks are coded, I look for something that impacts both banks. MAF sensor or evap leak or something of the such.

---

Seems like you were right. I cleaned the MAF, (had disconnected the battery before), reconnected, and everything runs fine right now.

I also changed out the air filter; I got my oil changed yesterday, and I now remember that the dumbass mechanic said my air filter was dirty, and he had blown it out; thus, he likely got some debris on the MAF, causing my issue.

I had been going to this shop just for oil changes because my old mechanic used to work there and run the place, but he recently retired, and the service has obviously gone downhill. Obviously, I need to find a new mechanic.

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Outstanding!!!!! Always I go with the easiest and least costly fix. You landed! Congrats!

zooguy96 said:

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austinag1997 said:

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Silvy said:

---

I'm just kinda spitballing here, but would you think that a failure of the MAF sensor would generate a code related to the MAF sensor?

---

No, I don't think there is such a code. If both banks are coded, I look for something that impacts both banks. MAF sensor or evap leak or something of the such.

---

Seems like you were right. I cleaned the MAF, (had disconnected the battery before), reconnected, and everything runs fine right now.

I also changed out the air filter; I got my oil changed yesterday, and I now remember that the dumbass mechanic said my air filter was dirty, and he had blown it out; thus, he likely got some debris on the MAF, causing my issue.

I had been going to this shop just for oil changes because my old mechanic used to work there and run the place, but he recently retired, and the service has obviously gone downhill. Obviously, I need to find a new mechanic.

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I thought about what you said this morning and few things resonated. What mechanic blows out an air filter, especially in place rather than replace it?

Sounds like the root of the issue. Dumbass as you stated in your post.