I’m hoping for your input and opinion about this
CAR: Explorer 2013 V6 standard
P0430 P0420 which is the catalytic converters are below efficiency threshold. Both sensors readings are about 0.74 constant when car is idling at full stop.
Higher than average fuel consumption for my driving conditions and style. Getting 15-16 mpg.
Car rarely feels like about to stall when come to a stop and it did a couple of times.
Other than that, the car is normal and there is no misfire in the engine
Things I did to help with the fuel consumption:
Used a fuel system cleaner from bg.
Changed engine air filter.
Changed spark plugs.
Form what I gathered searching and looking for possible causes are 2 possible issues for the codes and the higher than average fuel consumption:
1. A vacuum leak.
2. Fuel system pressure.
My questions are:
1. Will a vacuum leak trigger the CEL and specific code or not in my car?
If yes, it means that I don’t have a vacuum leak and I should look somewhere else.
If no, is it possible that the vacuum leak could trigger P0430 and P0420 codes.
2. Let’s assume I have a problem in the fuel system, higher or lower than normal pressure. Will that always trigger a code?
P.S: Watching YouTube videos and reading articles online trying to diagnose a car issue could make you go banana sometimes.
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