OBD-II code · Powertrain (generic)

P0C1D Electric/Auxiliary Transmission Fluid Pump Control Module Internal Temperature Sensor Circuit Range/Performance

The internal temperature sensor signal is outside the calibrated range. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.

Is it safe to drive with P0C1D?

The car may go into limp mode (reduced power). Get it diagnosed before a long trip.

Common causes

  • Most likelySensor characteristic drifted
  • PossibleThermal lag in module package
  • Less likelySensor element aged beyond calibration window

Symptoms

  • Check engine or transmission warning light on
  • Harsh, delayed, or missing shifts
  • Possible limp mode (locked in one gear)
  • Slipping or shuddering during gear changes

Repair at a glance

Difficulty
Hard
DIY friendly
Best left to a mechanic
Typical labour
2–8 h
Emissions test
Usually unaffected
Parts involved
Aux Trans Pump Control Module

Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.