My car is showing the engine check light on. When I checked the error code at local workshop, the error code showed up for bad accident sensors.Do I need to immediately change that? Is it harmful if I do not change it?
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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.
This could be anything. Usually when a check engine light comes on it means there is a problem detected by one of the sensors. If the light comes on and goes off it should have stored a problem code in the computer. Take it to your local Autozone and have them scan it and see if there is code showing. If there is no code showing it could be a short in the wiring to the light.
The check engine light comes ON,when there is error code stored in the car computer.
to get car scanned at diagnosis center to get error codes, At diagnosis center you will receive the error code.As per the error code it will detect the exact faulty part in the car due to which the problem is occurring.For more help :--- at www.autozone.com its absolutely free to get car scanned. Thanks. Keep updated for any more query. You can rate this solution and show your appreciation.