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1999 Mercury Cougar oxygen sensors

Tiny
TADRVR
  • MEMBER
  • 1999 MERCURY COUGAR
  • 6 CYL
  • FWD
  • MANUAL
  • 158,000 MILES
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!
Saturday, September 18th, 2010 AT 3:05 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 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
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Sunday, September 19th, 2010 AT 11:48 PM

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