Code No. P0A51: Current sensor error (MCU)
DIAGNOSIS CODE SET CONDITIONS
If the MCU detects an overcurrent of the motor coil, it will set the diagnosis code No. P1A23.
PROBABLE CAUSES
- Malfunction of the MCU (current sensor)
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STEP 1. Diagnosis code recheck
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Check again if the diagnosis code is set to the MCU.
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(1)Erase the stored diagnosis code.
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(2)Set the electric motor switch from the LOCK (OFF) position to the ON position.
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(3)Set the electric motor switch to the LOCK (OFF) position, and start the electric motor unit.
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(5)Check if the diagnosis code is set.
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Q.
Is the diagnosis code set?
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 Replace the MCU. (Refer to  .) Then go to Step 2.
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 Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)
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STEP 2. Diagnosis code recheck
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Check again if the diagnosis code is set to the MCU.
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(1)Erase the stored diagnosis code.
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(2)Set the electric motor switch from the LOCK (OFF) position to the ON position.
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(3)Set the electric motor switch to the LOCK (OFF) position, and start the electric motor unit.
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(5)Check if the diagnosis code is set.
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Q.
Is the diagnosis code set?
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Return to Step 1.
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The diagnosis is complete.
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