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Check engine light on 96 s-10 2.2 keeps coming on. Code is p0172. What causes it?


Answers :

This is due to rich exhaust. Try replacing 02 sensors
There are two descriptions for this code (1st) is air fuel ratio rich, malfunction. (2nd) is bank (1) system too rich. Well both codes are reporting unburned fuel in the exhaust. There isn't one answer for this problem. There are several reasons why you could have this problem.It can be caused by a clogged injector, fuel pressure regulator is leaking, defective O2 sensor/s, clogged air filter, air/fuel leaking past one or more exhaust valves. Well let me know if you have any other questions.
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