What is a PO420 in a 2002 Mercury Cougar: Now if your car is 2.0L DOHC. OBD ll PO420 : Catalyst Efficiency Below Threshold (BANK 1). Hope this helps...
yes
In North America the last model year for the Mercury Cougar was 2002
A 2002 Mercury Cougar 2.5 liter plug wire diagram can be purchased from your local Mercury Cougar. It can also be found at most auto parts stores.
Yes
2002
R134a
ECM reset for 2002 merc couger
According to the 2002 Mercury Cougar Owner Guide : In the passenger compartment fuse panel : # 21 is a 40 amp fuse for the power moonroof , power windows
The positive crankcase ventilation valve on a 2002 Mercury Cougar is located on top of the engine; in the valve cover. It removes harmful fumes from the engine.
The Mercury Cougar is no longer in production. The last year it was made was in 2002, when it was an anniversary edition.
1999-2002 Mercury Cougar.
On a 2002 Mercury Cougar : No , the thread on cap on your engine coolant reservoir is the pressure cap / radiator cap