P0A47: Drive Motor B Position Sensor Circuit Low

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.

Symptoms

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

Most 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

What to check, in order

Start with the simplest. You can tick off each step.

1. Read the codes with a hybrid-compatible scanner and write down the freeze frame data
2. With the connector unplugged, check whether the signal wire is making contact with ground.
3. Make sure the battery cooling air intake is clean
4. Check the 12 V auxiliary battery, which can also trigger warnings
5. Leave any high-voltage measurements to a specialized repair shop

Good to know

• It can trigger limp mode.
• It affects emissions.

What each character of P0A47 means

• P: Powertrain: engine and transmission
• 0: Generic code: same on every make
• A: Hybrid or air and fuel
• 47: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0A47?

If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.

What causes code P0A47?

The most common causes are: 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.

Related codes

• P0A48Drive Motor B Position Sensor Circuit High
• P0A45Drive Motor B Position Sensor Circuit
• P0A46Drive Motor B Position Sensor Circuit Range/Performance
• P0A49Drive Motor B Position Sensor Circuit Intermittent
• P0A41Drive Motor A Position Sensor Circuit Low
• P0C57Drive Motor B Position Sensor Circuit A Low
• P0C61Drive Motor B Position Sensor Circuit B Low

Sources

• law.cornell.edu: 13 CCR 1968.2
• mitsubishitechinfo.com: N503241010000700USA
• static.nhtsa.gov: MC 10090607 5448
• patents.google.com: en

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.