2001 Toyota Echo Oxygen sensor

Tiny
THESAURUS
  • MEMBER
  • 2001 TOYOTA ECHO
  • 4 CYL
  • FWD
  • MANUAL
  • 10,300 MILES
Engine starts running rough. Air filter container vibrating creating noise. Engine appears to want to stall. "Check Engine" light is illuminated on dash. Upon inspection a hose is not connected to air filter assembly. Reattach hose but problem persists. Now I also smell gas. Air filter is clean.
Where is the oxygen sensor?
Is the oxygen sensor the problem? If not the sensor, what are possible alternative problems?
How much does it cost to fix?
Maybe detached hose is supposed to be detached and is unrelated to problem.
Disconnected pos. Battery cable for 3 min. To erase code due to detached hose but problem persists.
Sunday, August 23rd, 2009 AT 4:29 PM

1 Reply

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
Oxygen sensors are in exhaust stream, there are two, one upstream (before convertor) and one after convertor (downstream).

Take car to any autoparts store and get codes read for free.

Most OBDII cars (built after 1996) require a scan tool to reset codes.

Hose is most likely part of EVAP system and should be connected. It will set a codes in PCM.
So get codes read and post codes.
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Tuesday, December 8th, 2009 AT 5:55 PM

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