Starting and power problem, code p0240

2012 HYUNDAI ACCENT
130,000 MILES • 4 CYL • 2WD • AUTOMATIC
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BRIANPAULF
  • MEMBER
  • 4 POSTS
The other day when I started my car there was a dramatic loss of power. No matter what I did i could not get the RPM's over 3,000 and the car above 10 MPH. I turned it off and it barely started again. I was able to limp about 5 miles home. When I got home, I tried to start the car and it would turn over, but would not catch. The next day I started the car with no problem and it drove with no problem. When I stopped to get gas it would not turn back on. It did start with a jump though. Now whenever I turn the car off, it will not start unless I jump it. If I let the car sit for approximately 30 minutes though it starts right back up. The only code is p0240. This code has been on for about a month. I have absolutely no idea what could be causing this problem. The low power issue when driving has not recurred.
Jan 4, 2021 at 7:31 AM
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STRAILER
  • ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
It sounds like you may have two problems, but if we fix one the other may go away so lets load test the battery. this guide can help:

https://www.2carpros.com/articles/car-battery-load-test

If it fails use this guide:

https://www.2carpros.com/articles/how-to-replace-a-car-battery

P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance

This could be because of the battery though. Let us know what happens and please upload pictures or videos of the problem.
Jan 6, 2021 at 9:20 AM
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