Powertrain, generic · Hybrid propulsion

P0A43 Drive Motor A Position Sensor Circuit Intermittent

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0A43 is set when the motor A resolver signal drops out or jumps only briefly, so that neither a steady low, high nor a lasting loss is confirmed. Stellantis uses it on the Pacifica Hybrid: NHTSA files show P0A43-00 stored in the hybrid control processor next to P0A3F and P0A45, and a 2026 parts review tells dealers to check active bulletins and flash the hybrid control processor before ordering a new power inverter module. No public set threshold exists. GM's Bolt bulletin shows how a slightly spread connector terminal causes such short dropouts. P0A3F, P0A41 and P0A42 cover permanent faults. Expect a warning that may vanish after a restart, sometimes with a short loss of drive.

Likely causes

Loose or spread terminal in the resolver connector, losing contact under vibration
Hybrid control or inverter software needing an update (Stellantis)
Chafed resolver wiring making intermittent contact
Intermittent fault in the power inverter module

Symptoms

  • Hybrid system warning or MIL that comes and goes
  • Brief loss of propulsion, normal again after restart
  • Code stored as history without current symptoms

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–4,000
Time1–8 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

drive motor a position sensorwiring harnesshybrid control module

Related codes

P0A3FP0A40P0A41P0A42P0A49P0A78

References: static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov.