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P053A

P053A - Breather heater disconnection

Bosch · ECU Troubleshooting

What does P053A mean?

The breather heater circuit has been disconnected or has an open circuit. This means the heater is not receiving power.

Common Causes

  • Loose or broken wire to the breather heater
  • Faulty breather heater element
  • Connection issue at the ECU or harness

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the wiring and connectors for the breather heater.

  2. 2

    Inspect the breather heater element for damage.

  3. 3

    Ensure the connection at the ECU or relevant harness point is secure.

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

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Source: Bosch ECU Troubleshooting
Open Manual (Page 7)Search more codes in this manual