I don't have an answer but I have exactly the same problem!!
That would depend on what year of Ford Explorer and which engine you have ( my 1995 Ford Explorer with the 4.0 liter OHV , V6 engine has ( 2 oxygen sensors )
Depends on the year of the vehicle, but if it's slightly modern - absolutely. A disconnected or faulty speed sensor will not allow it shift out of 1st or 2nd gear. The cars computer has to know how fast it's traveling to determine shift points I think. I'm not familiar with your particular car, but there could be other sensors that have an effect on shifting as well.
there are 4 o2 sensors
there are sensors all over the engine, transmission, chassis, etc.
two
On a 1995 Ford Explorer : There are ( 2 ) oxygen sensors ( I believe there is one sensor in the outlet of each exhaust manifold )
There are sensors inside the trans, outside the trans, and on the engine that will all affect shifting.
My Chilton repair manual - engine wiring schematic shows ( 2 ) heated oxygen sensors for the 1993 Ford Explorer
A 1994 Explorer has 2 oxygen sensors, they are either screwed into the exhaust manifolds at their outlets or into the ehaust pipes near the engine.
When an E230 won't shift beyond first gear and reverse, it may indicate a problem with the transmission fluid, such as low levels or contamination, which can affect shifting performance. Additionally, issues with the transmission control module, faulty sensors, or mechanical problems within the transmission itself could also be to blame. It's advisable to have a professional diagnose the issue to determine the specific cause and necessary repairs.
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