What does the code p01 40 mean and here you need to know that your car's oxygen sensor measures the amount of harmful emissions coming out of the exhaust system before the catalyst and the second one after it which tells the ECM how effective the catalysts are currently if you have a code 0140 it says that right now and the ECM does not receive any signals from the oxygen sensor and for you this should not mean that the catalyst is not working or that you cannot fix the lambda probe, this means that it simply cannot receive a signal from this sensor because of this your car cannot understand how your the car is working correctly because of this you receive such a code so that you check the code for the correct operation of your engine and more about something about the symptoms of error p01 40 of my next videos and do not forget to subscribe so that all videos are available to you without restrictions
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