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2002 Nissan Sentra Car seems to be losing Pickup.

Tiny
SENTRAOWNER_SE-R
  • MEMBER
  • 2002 NISSAN SENTRA
  • 4 CYL
  • FWD
  • MANUAL
  • 62,000 MILES
Hello,

I recently bought a used 2002 Nissan Sentra SE-R. It's a 4 cylinder 2.5 liter engine. When I bought it the check engine light was on. I brought it to a mechanic to have it serviced, only to be told it was the O2 sensor was making the engine rev higher when idling. The mechanic said it wasn't a problem, it simple revs at 1100 rpms rather than 800 rpms.

The other day, the check engine light turned off. Also, the car just doesn't seem to have the same pick up and torque it did before the light turned off. At 2700 rpms in 5th, it struggles accellerating on hills. I never experienced this problem before. What could be the trouble?
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Saturday, September 6th, 2008 AT 4:48 PM

1 Reply

Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Hi SentraOwner_SE-R,

Thank you for the donation.

The faulty O2 sensor means too much unburnt fuel could have gotten to the catalytic converter and prolonged use would damage it.

Check if the catalytic converter is clogged. Get the O2 sensor replaced and if the idling is still high, check for vacumn leaks.

Check the fuel filter for clogging as well.
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Sunday, September 7th, 2008 AT 6:44 AM

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