OBD-II reference

All 9.533 generic OBD-II codes, explained in detail.

Causes, inspection steps and sources — a comprehensive DIY archive. Created and maintained with love for the detail. Good luck and have fun!

Powertrain generic / SAE

P0A01

Motor Electronics Coolant Temperature Sensor Range/Performance

The motor electronics coolant temperature sensor reading is implausible relative to other thermal models or coolant flow estimates.

SystemPowertrain
Typegeneric / SAE
GroupP0
Range / numberA / 01

Possible causes

  • Sensor drift high
  • Low coolant flow medium
  • Sensor element aged beyond calibration window low

Inspection / repair

  • Difficulty: shop only
  • DIY: shop recommended
  • Estimated cost: 300–1500 €
  • Estimated time: 1.5–5 h
  • Component: motor electronics coolant temperature sensor
  • Component: electric coolant pump
  • MIL / check engine light

Sources

References

How to read OBD-II codes

The first letter names the vehicle system, the second digit distinguishes generic from manufacturer-specific, the remaining digits group fault area and number.

PPowertrain: engine, transmission, emissions
BBody: chassis trim, comfort, interior
CChassis: suspension, brakes, steering
UNetwork: CAN, control modules, communication