Service engine light keeps coming on. Shows pressure sensor is bad ?

The light is likely fine. There is a sensor on the engine that senses the oil pressure. Either the sensor has gone bad, or you have low oil pressure.
Replacing the sensor isn't difficult, but if you have low oil pressure, that can cause the whole engine to go bad, and cost you a whole lot.

Take it to a mechanic and have them measure the oil pressure. If it's ok, they can replace the sensor and you'll be fine.

you check the gas filter when you have a bad one its run to a point the gas cant go throgh its stalls pump stop gas go back and start over again pressure push the dirt again let me no pierre

If oil level in engine is at proper level, I wouild suspect oil pressure sending unit, does vehicle have an oil psi gauge on dash,,,if so what does it read. if oil psi reads well then it may be an oil level sensor. if you have access to a manual oil pressure gauge, you can remove the oil psi sensor and install manual gauge to get a true reading of what oil pressure is while running. if manual gauges shows low psi, then you may be looking at an oil pump.

DW Mylin

the oil pressure sending unit could be bad
oil filter could be bad
oil pump could be bad
main bearings could be worn

Usually when the oil light comes on, its too late to save the engine if the sensor is working properly.

Check the oil in your engine under the hood. If it has the correct amount of oil, check the wire going to the oil pressure sensor located on the side of the engine. It may be loose or the sensor may have failed sending a false reading.

If you do not have oil in the engine " no oil pressure" you may have badly hurt the engine, and the noise you are hearing is the rocker arms begging for mercy.

Good luck! write back

Have the PCM scanned, you are about due for a timing belt replacement. If it shows camshaft or crankshaft corralation error them you need to replace it very soon.

Two things, first try another tire guage, second the sensor is bad. these can cost up to $80.00.
Replace the sensor or ignore the light and keep check on the tire pressure.
Randy

If your oil gauge if you have one reads good pressure, more then likely you have a bad sensor, if you just have an oil light, take it to a repair shop where they can do an oil pressure test. Have it check, low oil pressure can cause major engine damage.

need to have the tire sensors checked sounds like you have one thats bad, if the light comes on and all tires are good then theres a bad sensor, also make sure spare is also full of air, some come with a sensor in the spare also, hope this is helpful, town fair tire can test them for you,

p0171 is lean condition bank one. you could have a vacuum leak a bad map sensor bad maf sensor clogged fuel filter low fuel pressure. start with the vacuum leak first.