P0A47 Code - Drive Motor 'B' Position Sensor Circuit Low
Quick Answer
A resolver is a sensor that is used to detect the position of the magnetic poles the rotor of a motor generator. Common causes include Faulty Inverter with converter assembly, Faulty Hybrid vehicle generator assembly, Faulty Hybrid vehicle motor assembly. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0A47 indicates Drive Motor 'B' Position Sensor Circuit Low.
- Common causes
- Common causes include Faulty Inverter with converter assembly, Faulty Hybrid vehicle generator assembly, Faulty Hybrid vehicle motor assembly.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0A47 Description
Each resolver contains a stator that has an excitation coil and 2 detection coils (S, C). The gap between the stator and rotor changes as the rotor turns because the rotor is oval shaped. An alternating current with a predetermined frequency flows through the excitation coil, and detection coils S and C output alternating currents in accordance with the sensor rotor position.
The inverter with converter assembly (MG ECU) detects the absolute position of the rotor according to the phases of detection coils S and C and the heights of their waveforms. Furthermore, the CPU calculates the amount of change in the position within a predetermined length of time, in order to use the resolver as a speed sensor.
The MG ECU monitors signals output from the motor resolver and detects malfunctions.
What are the Possible Causes of the DTC P0A47?
- Faulty Inverter with converter assembly
- Faulty Hybrid vehicle generator assembly
- Faulty Hybrid vehicle motor assembly
- Wire harness or connector
How to Fix the DTC P0A47?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0A47 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0A47 Code
1. What are common symptoms of OBDII code P0A47 (Drive Motor 'B' Position Sensor Circuit Low)?
- Common symptoms include reduced engine performance, decreased fuel efficiency, and the illumination of the check engine light.
2. What can cause the OBDII code P0A47 to trigger?
- The code P0A47 is triggered when the drive motor 'B' position sensor circuit reports a low voltage signal to the vehicle's onboard computer.
3. How serious is the OBDII code P0A47 (Drive Motor 'B' Position Sensor Circuit Low)?
- While the vehicle may still be operational, it is recommended to address this issue promptly to prevent further damage to the drive motor and related components.
4. How can I diagnose the cause of OBDII code P0A47?
- Diagnosing the issue may involve checking the drive motor 'B' position sensor wiring for damage, testing the sensor itself, and verifying proper voltage levels in the circuit.
5. What are some possible DIY repair tips for OBDII code P0A47?
- DIY repair tips may include checking and repairing damaged wiring, cleaning sensor connections, and resetting the fault code to see if it reoccurs.
6. Can driving with OBDII code P0A47 cause long-term damage to my vehicle?
- Continuing to drive with this code may potentially cause further damage to the drive motor and related components, leading to more costly repairs down the line.
7. Is it safe to ignore the OBDII code P0A47 (Drive Motor 'B' Position Sensor Circuit Low)?
- Ignoring this code can lead to worsened engine performance, reduced fuel efficiency, and potential long-term damage to the drive motor, so it is not recommended to ignore it.
8. How much does it typically cost to repair OBDII code P0A47?
- The cost of repairing this code can vary depending on the extent of the issue, but it may involve anywhere from a simple sensor replacement to more extensive wiring repairs.
9. Can a faulty drive motor 'B' position sensor cause other issues in the vehicle?
- Yes, a faulty sensor can impact the overall performance of the drive motor, leading to issues such as poor acceleration, decreased power output, and abnormal engine operation.
10. Is it necessary to visit a mechanic for OBDII code P0A47 repair, or can I fix it myself?
- While some DIY enthusiasts may be able to address this issue themselves, it is recommended to consult a qualified mechanic, especially if you are not familiar with automotive electrical systems.
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