Can anyone diagnose this issue.
2004 civic ex with over 300,000 miles
For last 5 months or so, I have to keep full tank of gas. If the tank is half, the car starts stalling, and the first sign of it is when I am taking a sharp right turn on highway exit. It’s like the engine dies for a second or two and comes back when the right turn is over. If I keep driving and the tanks get lower, it will happen even without the right turn. I just fill up the tank and the problem is fixed.
Check engine light is on sometimes (but not always) with these codes P0171B and P0497, but I am not sure it’s related.
There is sometime also a short delay in starting the car, irrelevant if the tank is full, (a second or two of extra cranking) but that might be a different issue too.