P0A47Drive Motor B Position Sensor Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- 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.
- What you may notice
- MIL or hybrid service lamp
- Second motor disabled, reduced traction or power
- Fault may come and go with vibration or moisture
- Likely causes
- LikelyResolver sine, cosine or excitation line shorted to ground
- PossiblePoor pin fit or water ingress at the motor B resolver connector
- RareShorted resolver coil inside motor B
- RareFaulty resolver input stage in the motor control module
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €150 – €4,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.