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P1DAD fault code: what it means

P1DAD: Input shaft / output shaft direction correlation on the 9-speed (948TE) Cherokee. Rough shifts possible; FCA TCM reflash and quick learn.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

  1. TCM software
  2. speed sensor signal
  3. internal gearbox fault

P1DAD by make

Jeep

Input shaft / output shaft direction correlation on the 9-speed (948TE) Cherokee. Rough shifts possible; FCA TCM reflash and quick learn.

Usual causes: TCM software; speed sensor signal; internal gearbox fault

Not sure what P1DAD means on your car? Ask Credov.

Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.