Powertrain, generic · Hybrid propulsion

P0A47 Drive Motor B Position Sensor Circuit Low

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modePossible

P0A47 means a resolver signal of motor B is below its allowed range, typically from a sine, cosine or excitation line shorted to ground or a shorted coil. No manufacturer documents this code publicly. Mitsubishi files low resolver signals of the 2023 Outlander PHEV rear motor under its own codes instead: P0C57 for sine and P0C61 for cosine at 0.3 V or less for 0.18 s. Kia uses the motor A twin P0A41 on the Optima Hybrid and blames shorts or pin fit in the sub-harness. CARB 1968.2 requires circuit monitoring of electric drive components, and Bosch patents show how a ground short is told apart by line offset. P0A48 is the high side, P0A45 the general circuit fault. Expect a warning lamp and reduced motor B drive.

Likely causes

Resolver sine, cosine or excitation line shorted to ground

Poor pin fit or water ingress at the motor B resolver connector

Shorted resolver coil inside motor B

Faulty resolver input stage in the motor control module

Symptoms

MIL or hybrid service lamp
Second motor disabled, reduced traction or power
Fault may come and go with vibration or moisture

Repair estimate

DifficultyShop_onlyWorkshop job

Parts and labour€150–4,000

Time1–8 h

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

Parts involved

drive motor b position sensorwiring harnesshybrid control module

References: law.cornell.edu, mitsubishitechinfo.com, static.nhtsa.gov, patents.google.com.