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P1473

P1473 - ROM fault

Bosch · ECU Troubleshooting

What does P1473 mean?

This error indicates a problem with the Read-Only Memory (ROM) within the ECU. The ROM stores critical operating software and data.

Common Causes

  • ROM chip failure
  • Data corruption in the ROM
  • Poor electrical connection to the ROM chip

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Ensure the ECU has a stable power supply.

  2. 2

    Check for any signs of physical damage to the ECU board.

  3. 3

    If the ROM fault persists, the ECU likely needs replacement.

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