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Is my 2015 Patriot (2.0l Latitude) worth repairing or should I junk it?

669 views 12 replies 4 participants last post by  TterevelFYtnom  
#1 ·
Edit - If this isn't the right area to post this, please let me know where to post so I can post there and delete here, thank you.

I have a 15 Patriot latitude 2.0l and it's basically a paperweight as it keeps throwing "high volume air detected" even after replacing the throttle body 18 months ago, the throttle control actuator (gas pedal) a month ago, and the IAP/MAP sensor a week or so ago. As it's not a constant issue, I drove it for over 4 hours the other day without it throwing a code, I don't see how it could be a vacuum hose or manifold seal issue, it's been suggested it could be "the brain." What is that part called, and what is a ballpark price for what it costs to replace that? Finally, is there a way, other than going to a shop, to verify that? I am literally broke, living on less than $40 a day income 5 of 7 days a week, and never more than $70 a day, due to a disability and loss of an IT job, so I can't afford the price for some shop to just tell me what's wrong, and of course, AutoZone can't tell me from their tester.

Thank you all in advance for any and all help. It's paid off, don't have a way to get a "new" car any time soon, but I also can't afford massively expensive repairs, so if it would be better to just sell it off to someone for what I can get, that may be needed, it's just not what I want to do.
 
#2 ·
...it's been suggested it could be "the brain."
What is that part called, and what is a ballpark price for what it costs to replace that?
The PCM? Maybe $200-ish depending on where you buy it:


Maybe try carefully spraying carb cleaner around the edges of the manifold where it mates to the head while idling to see if the idle changes.
 
#3 ·
I will show this to my Dad, who knows way more than I do about cars, so we can try it, and how hard is changing the PCM? Is it something I could do as he guides me since he's getting on in years and I don't want him over exerting himself.

Edit - Also if you have a diagram (or better, video) showing how to change the PCM I'd appreciate it as Google either shows a different model Jeep or a different part.
 
#6 ·
An intake manifold gasket and maybe a new pcv valve is certainly a cheaper try than an ecm. Mine showed signs of leaking at 140k miles when I removed it to clean the flapper valves.
 
#8 · (Edited)
Could you guys share your current fuel consumption numbers on the Patriot? Have you noticed any changes in MPG after the 'system too lean' warning popped up?

t would be great if you could check and post your STFT (short-term fuel trim) and LTFT (long-term fuel trim) values.

If the intake manifold is crack-free, vacuum leaks could be coming from:

  • A damaged PCV valve hose
  • Brake booster vacuum line
  • Evap canister purge valve hose
  • Faulty intake manifold gasket
Also don't forget to inspect the exhaust manifold for cracks - they can trick the upstream O2 sensor into reading false lean conditions.

Also, make sure the intake air temperature (IAT) sensor is working correctly across the entire temperature range. In my case, this sensor showed accurate readings up to 95°F, but then it just stuck at that value and stopped responding.