Help Needed: P0174 Code on My Chevy! What's Going On?

Questions and Support
1

I’m dealing with a P0174 engine code on my Chevrolet, and I could really use some help figuring this out. I’ve done a bit of research and it seems this code indicates that the engine is running too lean on bank 2, which can lead to some major performance issues.

Symptoms I’ve Noticed:

  • Rough Idling: The engine doesn’t seem to be running smoothly, especially at low RPMs.
  • Poor Acceleration: When I try to accelerate, it feels sluggish.
  • Check Engine Light: Obviously, the check engine light has been on since the code was thrown.

Troubleshooting Steps So Far:

  • Checked for Vacuum Leaks: I’ve inspected hoses and connections but haven’t found anything obvious.
  • Cleaned the MAF Sensor: I thought it might be a dirty mass air flow sensor, so I cleaned it, but that didn’t help.
  • Replaced Fuel Filter: Just in case it was a fuel delivery issue, I replaced the filter.

Questions for the Community:

  1. Have any of you experienced this code on your Chevys? What steps did you take to resolve it?
  2. Could this be related to my fuel injectors? I’ve heard that can sometimes cause lean codes too.
  3. Is there anything else I should look into? I’m open to any suggestions you may have.

Thanks in advance for any advice or experiences you can share! Looking forward to hearing from others who’ve dealt with this engine code.

2

I’ve been dealing with a P0174 code on my Chevy, and I’ve noticed a huge drop in fuel economy. Anyone else experiencing this?

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3

Absolutely! When I had this code, my fuel efficiency tanked too. I also felt my engine was idling rough at stops.

4

Rough idling can definitely be a symptom of the P0174 error. Have you checked for vacuum leaks? They could cause your engine to run lean.

5

I’ve experienced misfires when under load; it’s frustrating! Could the lean condition cause that? What else should I look out for?

6

Yes, definitely! Lean conditions can lead to unstable combustion, causing misfires. Check the MAF sensor, too.

7

I’ve had similar issues. Reduced power on acceleration could also be a sign, right? It’s like my Chevy turned into a sloth!

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8

Haha, that’s a great way to put it! It’s so frustrating when your car feels sluggish.

9

Has anyone checked their fuel filter? A clogged filter could also cause issues related to running lean.

10

That’s a good point! I didn’t think about that. It could be a simple fix compared to others.

11

Reading through this, I realize I should probably investigate my O2 sensors as well. Could they be affecting everything else too?

12

Yes! Faulty O2 sensors can definitely cause lean running issues, which is likely what triggered your code.

13

Guys, let’s not forget to have fun with our cars! I’m thinking of wrapping mine in bubble wrap if this keeps up! :joy:

14

I started seeing the P0174 code on my Chevy last month. From what I’ve researched, it typically points to a lean mixture, which can often indicate vacuum leaks. Have you checked your hoses?

15

I had a similar issue, and it turned out to be a cracked vacuum hose. It’s worth inspecting every hose closely!

16

Vacuum leaks are a common culprit for that code. But don’t forget about the MAF and O2 sensors. They can also cause a lean condition if they’re not functioning properly.

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17

I had a faulty MAF sensor once, and that gave me a headache for weeks. New sensor fixed the issue immediately! Definitely worth checking.

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18

Good insights! I would also suggest examining the fuel delivery system. A clogged fuel filter could intermittently cause a lean mixture, too.

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19

That’s a good point! Fuel delivery issues are often overlooked. It might save some time for the OP.

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20

Anyone else had to deal with P0174 before? It can be so frustrating! It feels like a guessing game narrowing it down.