Question about Mercury Cars & Trucks
Under hood, driver side, lower engine area, mounted on side of oil pan.
Posted on Apr 19, 2017
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Posted on Jan 02, 2017
the oil pressure switch is on pssenger side, lower engine area,beside oil filter, mounted in engine block. The pressure relief valve is in the oil pump, in which case, you have to drop the oil pan,and take off the oil pump.
Posted on Jan 31, 2009
I just got done replacing the O2 sensors in my 99 Cougar due to throwing a P0135 malfunction code. There's 3. Facing the engine there's one in the front coming off of the front header, which is easy to get to. Another more tricky one if between the engine and the fire wall on the rear header pipe. The third is under the vehicle behind the transmission pan on top of the exhaust. In order to replace the O2 sensor near the fire wall you will need to remove the 4 retaining bolts for the ECM module and move it out of the way. Additionally you will need to remove the 2 retaining nuts for a wiring harness that is seated below the ECM module. Pay close attention to the connectors because the front and under vehicle O2 sensors have round connectors the one near the firewall has a squared connector. I was able to replace all 3 by myself in approximately 35 minutes. If your throwing a O2 heater malfunction code it is most likely going to be the sensor near the firewall. make sure that you know someone with a code reader so the code can be cleared. If you're do for an emmissions inspection be sure to put at least 40 miles on the new O2 sensor with different types of driving (e.g. highway, coasting, decellerated turns and rapid acceleration). Gotta love project cars for your kids!!
Posted on Apr 04, 2009
SOURCE: where is the oxygen sensor
There will be 4 sensors in this system. One in each exhaust manifold on each side of the engine. Locate the catalytic converter under the car and you will see one just before the "cat" nearest the engine and one just after the "cat". What does the code say that was retrieved. This will help you identify which sensor needs to be replaced. Bank one sensor one is the side with the number one cylinder. Bank one sensor 2 is the one just before the "cat". Bank 2 sensor 1 is in the exhaust manifold on the opposite side of number 1. Bank 2 sensor 2 is after the "cat". I hope this helps. The size needed to replace the sensor is either 7/8" or 22mm. Either one will work. Soak liberally with a good rust penetrant at least an hour before.
Posted on Jul 03, 2011
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