2004 Toyota Avalon Check engine code

2004 TOYOTA AVALON
113,450 MILES • 3.7L • V6 • FWD • AUTOMATIC
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JJLIGAS1234
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  • 2 POSTS
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.
May 18, 2015 at 6:47 PM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
it's both O2 sensors prior to converters but it may not be them.
May 19, 2015 at 5:50 AM
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JJLIGAS1234
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  • 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.
May 20, 2015 at 7:04 AM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
bank 1 is behind cylinder #1 prior to converter. bank2 is other side behind the converter.
May 20, 2015 at 7:17 AM
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