Low power only on steep climbs?

2011 PEUGEOT 207
360,000 MILES • 1.6L • 4 CYL • 2WD • AUTOMATIC
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CHARBELDEAD
I have a big problem with the car, but only on steep climbs. I feel like the car is going uphill against its will. It's really slow. There are no problems with the gears on coastal roads that don't have good climbs. The engine is new and everything is fine. Do you have any idea about the issue?
May 27, 2025 at 9:17 AM
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CHARBELDEAD
  • MEMBER
  • 2 POSTS
And i forgot to mention that i have a steady check engine light never turned off.
May 27, 2025 at 9:56 AM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,193 POSTS
  • ASE Certified Mechanic
Hi,

It could be a few things. For example, a partially clogged catalytic converter certainly causes a power loss. Also, a weak fuel pump can do the same. Even a plugged air filter can cause power loss.

What I recommend is to have the computer scanned to determine what trouble codes are stored. That should point you in the right direction.

If scanning doesn't help, take a look through these links that explain how to check the exhaust as well as the fuel pressure, and let us know what you find.

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Let us know your thoughts and questions.

Take care,

Joe
May 27, 2025 at 8:37 PM
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