Q: OBD code P0501, speedometer dead, hesitation shifting.

asked by on October 09, 2016

Recently during a two drive the speedo became erratic even though the RPM remained constant while on the highway. The engine check light was already on due to the up stream O2 sensor needed to be replaced. Next day zero reading on the speedo and hesitation with shift points. Sperdo occasionally showed a reading then fails back to zero.

My car has 180500 miles.
My car has an automatic transmission.

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