1999 Mercury Cougar oxygen sensors

1999 MERCURY COUGAR
158,000 MILES • 6 CYL • FWD • MANUAL
Avatar
TADRVR
  • MEMBER
  • 1 POST
how many oxygen sensors does the 6 cylinder have?

is there a sensor on each exhaust manifold, 1 on the exhaust pipe before the catalytic converter, & 1 after the converter?

Thank you!
Sep 18, 2010 at 3:05 PM
Advertisement
Avatar
RASMATAZ
  • CAR REPAIR CONTRIBUTOR
  • 75,992 POSTS
Heated Oxygen Sensor (HO2S) (Front No. 11) (2.5L)On right side of engine, in exhaust manifold.

Heated Oxygen Sensor (HO2S) (Front No. 21) (2.5L)On left side of engine, in exhaust manifold.

Heated Oxygen Sensor (HO2S) (Rear No. 12) (2.5L)On right side of engine, in exhaust, behind converter.

Heated Oxygen Sensor (HO2S) (Rear No. 22) (2.5L)On left side of engine, in exhaust, behind converter.

https://www.2carpros.com/kpages/auto_repair_manuals_alldata.htm
Sep 19, 2010 at 11:48 PM
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.