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P1031

P1031 - Shutoff 1 due to ECU internal abnormality

Bosch · ECU Troubleshooting

What does P1031 mean?

The ECU has detected an internal problem and has shut down operation 1 as a safety measure. This prevents potential damage or malfunction.

Common Causes

  • Internal ECU hardware failure
  • Software error within the ECU

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn the system off and then on again.

  2. 2

    Check for any related error messages or indicators.

  3. 3

    If the shutdown persists, the ECU requires professional inspection.

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

ECU internal faultECU internal fault - Electronic Control Unit internal errorP0008P0008 - No signal on both crankshaft and camshaft speed sensorP0122P0122 - Accelerator sensor 1 error (voltage low)
Source: Bosch ECU Troubleshooting
Open Manual (Page 7)Search more codes in this manual