How many o 2 sensors on a 2001 grand marquis
four two upstream and two down
The 2003 Mercury Grand Marquis came equipped with the 4. 6L V8. Oxygen (O2) sensor locations are upstream and downstream (before and after the catalytic converters).
mass air flow sensor, O2 sensors, bad fuel pump
p0141 is for the sensor behind the catalytic converter.
On the left bank of the motor, 2nd sensor to the rear.
My 1996 Grand Marquis had the same problem, if you are getting bad fuel economy, it is most likely the O2 sensor (the first one on the driver's side before the exhaust system). If you have a code for both bank one and two, then you probably need to clean or replace your mass air flow indicator.
In the exhaust pipe.
An O2 sensor unscrews just like a spark plug.
Ain't no fixing an O2 sensor. If there is a problem with it, replace it with a new one.
You should have 2 O2 Sensors, one in front of the Catalytic converter, and on after. You shuold see both by just looking under the Jeep
location of relay for heated o2 sensor 1999 jeep Cherokee sport