Sorry, got tied up in a meeting this morning on Supportability Strategy and couldn't hit this back as quick as I wanted. If I recall, 1456-7 is an emissions code. I can't remember, but one is fuel cap and the other is EVAP. I don't even recognize the 2000 series, didn't think they went up that high, but I could be wrong. Typically, O2 sensors will just report as a failure, as either Bank 1 or Bank 2 (before and after catalytic converter). It's an easy fix, they have a wiring harness that's disconnected and a deep well socket to remove from the cat. After install, the battery should be hooked back up (should be disconnected prior to removal), allow BIT (built in test) to pass/fail, check codes again. Sometimes, it can take a day or more for a BIT to fully fail, but not always. Sometimes, a fault can resolve itself over time as well. For example, you don't close your gas cap, your check engine light goes on. You stop, get out, tighten cap and drive. Twenty minutes later the light may go off, it may not until next engine restart. That 20 minutes takes time for the system to close the loop and retest, but it may not reset until next restart. Each brand is slightly different in how their BIT/FI tests work. Anyway, I'm going off on a tangent. I could be wrong, but the harness for an O2 sensor on a Honda is a small 4-6 pin harness. Not sure how a pin could get bent unless it was installed/remove incorrectly, or if they used the wrong part. Here's where it gets tricky. While you can use a universal O2 sensor, but splice off the old connector mating harness, it's not recommended. A lot of the universal sensors, while having the appropriate tolerance, aren't exactly the OEM's spec/standard. This means you may burn too hot, not have enough air, not the right fuel mixture. Do you have a strong gas odor/smell from under the hood or near the tank? This could be indicative of faulty mix ratio (O2) or a bad EVAP system. However, O2 is more likely the culprit. They typically don't last super long and are pretty easy/cheap to replace.
How is he eating now and in what frequency? He could graze all day on food and that may be what his body needs. The thing about dietary analysis is that there isn't a "one size fits all" approach. There are generalities that are applicable to all, but implementing a system that is tailored to that individual (lifestyle and goals) is what is key. If he's hungry all the time, that could be indicative of a couple of things, but without knowing specifics it's hard to determine the corrective action to apply (appetite suppressant may be viable). Some people go about dieting by reducing their meal frequency, i.e. one or two meals a day. This has the same result as reducing caloric intake below 1000. Since the body gets infrequent feedings (intake), it is more likely to store what it does get since it knows it will only get limited intake periods. If the body gets low caloric intake, it knows it's only getting limited intake potential and must store that intake. Combine the two and it's a recipe for dietary disaster. It may work in the short term, but long term the body will not adjust properly. That's why you see so much "yo yo" in "dieting". I would encourage him to eat all day, all the time. However, encourage the correct foods. Vegetables, fruits, etc. Stay away from processed items (chips, etc). Barring any impact from that effort over time, there might be a processing imbalance that might only be addressed through medication.
Correct, anything 1000 calories and under a day is not healthy and the body will start to make fat stores to keep energy in reserve because it's not getting a regular intake or a sufficient intake to handle the output (activity).
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I'd be sleeping in a cardboard box and eating out of dumpsters.
