Codes po131 and Po140

2003 MERCEDES BENZ E320
112,000 MILES • 3.2L • 6 CYL • 2WD • AUTOMATIC
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HENRY KATRIS
  • MEMBER
  • 1 POST
Got reading: po131 bank 1 sensor 1 , and. Po140 bank 1 sensor 2. Please tell what side bank 1. And where are fuse relay located? Thanks, Henry.
Jan 12, 2020 at 10:56 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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JACOBANDNICKOLAS
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 110,190 POSTS
Hi,

Bank 1 will contain the number 1 cylinder. In this case, it is the right side. See pic 1.

Pic 2 (fuse/relay box) engine compartment left side.

Pic 3 (fuse box) interior of vehicle / driver's side.

Pic 4 (fuse box) trunk.

Let me know if this is what you needed.

Take care,
Joe
Jan 12, 2020 at 8:46 PM
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