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2004 Toyota Avalon Check engine code

Tiny
JJLIGAS1234
  • MEMBER
  • 2004 TOYOTA AVALON
  • 3.7L
  • V6
  • FWD
  • AUTOMATIC
  • 113,450 MILES
I check my check engine light the codes that came up where po135 and po155 I don't know where these sensors are and what sensors to buy.
Monday, May 18th, 2015 AT 6:47 PM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
It's both O2 sensors prior to converters but it may not be them.
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Tuesday, May 19th, 2015 AT 5:50 AM
Tiny
JJLIGAS1234
  • MEMBER
  • 2 POSTS
I found out its they bank 1 sensor 1 and bank 2 sensor 2. Now I'm not sure if it's the one on the exhaust manifold and the one coming off the back of the engine block.
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Wednesday, May 20th, 2015 AT 7:04 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Bank 1 is behind cylinder #1 prior to converter. Bank2 is other side behind the converter.
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Wednesday, May 20th, 2015 AT 7:17 AM

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