2003 LC. My CEL light came on today during a short drive. Scanned and it’s showing P0031, Heater Control Circuit Low. I haven’t reset it yet to see if it comes back.
I searched the forums and saw a couple of posts that stated replacing the faulty sensor fixed the issue for most, but...
Thanks!
I searched the forums and saw a couple of posts that stated replacing the faulty sensor fixed the issue for most, but...
- How do I determine which sensor is bad? The error code wasn’t specific.
- My truck occasionally has the exhaust “tick-tick-tick” so I know it has a leak somewhere in the manifold. The ticking noise isn’t that bad at all though, and it’s not always audible. Could a failing sensor mean the leak is getting worse? We don’t smell any exhaust fumes while driving around.
- Somewhat related to this post... I think I might try this in the next few months:
Note: This video goes over repairing exhaust manifold leaks/small cracks using Extreme Heat High Temp J-B Weld. That's what I am referring to trying in the next few months. The Youtuber stated he did it about 8 years ago to his truck and hasn't had issues. My exhaust system does not have any huge holes in it.
Thanks!
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