This is pretty interesting....
A historical code means it's something that happened in the past but isn't currently happening. The system will still throw a CEL if the "something" is important enough that it needs attention.
Note that modern cars have *several* computers, each of which have their own diagnostics. It's quite common to have a bunch of codes thrown by various systems and be completely OK. My favorite is when the manufacturer is too lazy to do proper coding based on options and just uses the same setup for all variants of a vehicle. The lower-optioned ones then tend to throw codes complaining that options or systems aren't present...... Doesn't throw a CEL, but shows up if you use the appropriate
scanner. Worked on a friend's cheap-o Corolla a few months back and had to wade through several pages of bullshit to get to anything real.
Now, back to yours, what is happening here looks like a signal interference problem.
P0238 is saying the signal from the MAP sensor - I expect the one on the manifold after the throttle body - went high (5V in this case) which it should never do. Damn near every sensor has a range from 0V to 5V to report whatever it's sensing and the extremes generally don't happen. Once that happens the ECU doesn't know WTF is going on in the manifold and will panic. It would go into limp mode. Once the sensor starts registering correctly the ECU said "GREAT!" and got back to work. It was logged and flagged because that would prevent the ECU from running the engine correctly.
The next two are cam position sensors. The ECU is saying it wasn't able to correctly interpret the signals from the sensors. It's "Pending" because the ECU briefly had a problem, but quickly started working correctly again. This is its way of keeping track, so if it has another brief problem it'll throw in the towel. Pending codes will get erased if the ECU goes a ""sufficient"" amount of time/distance without hitting that same error again.
What's got my attention is the combination here. Cam sensors generate a waveform that the ECU has to capture and interpret. This is highly sensitive to interference. Too much noise in the wire and the ECU won't capture the signal. Frankly, the fact that it ever works is a f*cking miracle given the quality of the cabling, routing, the underhood environment, and the amount of processing allocated for DSP work. The MAP sensor doesn't need that much processing - just sampling at some frequency (probably slow, like 100hz or something). But one or more of those samples came back 5V.
Sure looks to me like a wiring or interference problem. Really, really closely check ALL of the harness under the hood - remove the trim panel around the brake master cylinder too - for any signs of rodent damage. Torn tape? Chewed wires? Something rubbing and exposing copper?
Make sure all the connectors are fully seated on the MAP and cam sensors. Hell, pull them off and make sure the contacts are OK.
If physically it's OK, then it gets way more interesting.
On other cars I've seen seriously weird shit happen when coils start to fail. It's real fun on DBW systems where the ECU decides that some EMF noise means it's lost control of the throttle blade. The spark energy starts to internally short or other internal damage causing the coil to spew a ton of EMF noise. The ECU will get all kinds of confused and basically pick whatever it thinks is most likely. Sometimes it's slightly more logical and, e.g., you can see that all these wires just so happen to be routed right on top of the #6 coil. Or there can be something more physical, like there's an arc down the side of the plug, or maybe the plug is cracked or tip broken or whatever. Again, causing a spew of EMF.
This type of junk is always intermittent and dealers really hate chasing down intermittent problems.
I haven't seen much at all about coil problems and coils aren't readily available, so that seems unlikely. And with an unmodded car the stock plugs should be just fine (Assuming it doesn't have 100k miles on it already).
You can throw parts at it - plugs first, then coils - but it's less than 50% chance that'll work out for you.
Regular access to a high quality
scanner and finding a manner to reliably recreate the condition will help greatly. I would expect there's some specific scenario - certain amount of boost, certain speed, certain throttle - where something goes BZZT and you get your CEL. Could even require some certain bump or vibration to get the wires in the right place or to pull apart a poor connection.
Or a rodent chewed some wires.
For me, I was lucky. The rat only chewed through the JB4 o2 sensor wire before curling up and dying on top of the engine. Smelled horrible for days though. Car had been parked for less than a week!
Anyway, do a thorough examination of the wiring harness, then I'd strongly recommend pulling all the plugs for a physical inspection. If those turn up empty then you're in for an adventure.
Going to the dealer with the shoe polish on the window is downright hilarious. "Hey, dude raced his car and threw a random CEL that's cleared. What now?" "Tell him to go away"
For real fun, this could have been completely random and never happen again.
Core thing to take away is the ECU saw a handful of one time signal processing errors. If I was the dealer I'd just clear 'em and say nothing even happened. Maybe it's nothing.
