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Low power

Tiny
CINO01
  • MEMBER
  • 2000 TOYOTA AVALON
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 190,000 MILES
Loses power going up hill and slow take off
Monday, March 20th, 2017 AT 12:53 PM

3 Replies

Tiny
STEVE W.
  • MECHANIC
  • 13,465 POSTS
When was the last time the fuel filter was changed? Is the check engine light on? This sounds like it could be poor fuel flow due to a clogged filter or possibly a bad /plugged convertor or exhaust system. Would need to be tested for that with a pressure gauge in the O2 sensor port.
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Monday, March 20th, 2017 AT 6:08 PM
Tiny
CINO01
  • MEMBER
  • 2 POSTS
Yes the check engine light is on and no I haven't changed the fuel filter yet. I get a 420 read out the tester.
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Tuesday, March 21st, 2017 AT 5:48 AM
Tiny
STEVE W.
  • MECHANIC
  • 13,465 POSTS
P0420 = Catalyst System Efficiency Below Threshold (Bank 1)
Could be a partially plugged system or a bad O2 after the cat. Would need further testing to determine the root cause.
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Tuesday, March 21st, 2017 AT 8:40 AM

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