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Re: ck eng light
You need an oxygen sensor socket - it's a socket with a cut down the side that allows you to remove the sensor without damaging the wires. You'd do yourself a favor by spraying the sensor down with PB Blaster or another penetrating oil to help it unseize from the piping (exposure to the elements, plus heat from the exhaust, causes them to seize pretty solidly to the piping). Then unplug the harness from the sensor, remove it, thread in the new sensor, plug it in, and you're done.
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the upper 02 sensor is for air fuel mix while the secondary 02 sensor is for the operation and status of the catalitic converter are you sure the catalitic converter is not plugged. Could be if you have had a loss of power
The O2 sensor is most likely the issue. Also, try cleaning the Throttle Body Injector with cauberator cleaner or tbi injector. Build up within the TBI may be causing a gas deficiency which causes it to run lean. If that doesn't help, try running a higher octane fuel, about 93 octane minimum. This will causes ANY debree in the injectors to be cleared.
SAE J2012 Revised DEC2007 lists Diagnostic Test Code (DTC)P0133 as "O2 Sensor Circuit Slow Response Bank 1 Sensor 1"
This code basically means that the upstream oxygen sensor on bank one of your engine is not responding as quickly as it should to changes in oxygen leavels in the exhaust.
The usual causes of this is an oxygen sensor that is just plain worn out (if it has a lot of miles on it) or an oxygen sensor that is contaminated by engine oil or antifreeze leaks causing these fluids to be burned in the exhaust (like bad piston rings, defective PCV valve, blown head gasket, etc.).
In any case, the oxygen sensor needs to be replaced. However it should be noted that if it is caused by contamination like that described above, replacing it will only result in a new oxygen sensor doing the same thing if the cause of the contamination is not repaired.
the ck eng light is displayed because ther is an issue with a computer controlled component such as eng sensors or egr system.it will have to be scanned to see what part is failing then repaird as needed.it will also have to have the codes that are stored cleared with a scan tool.before test drive to see if repairs are done proper.