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P1484

P1484 - Recognition error of engine speed

Bosch · ECU Troubleshooting

What does P1484 mean?

The system is unable to correctly recognize or process the engine speed signal. This can affect engine control and performance.

Common Causes

  • Faulty crankshaft or camshaft sensor
  • Wiring issue with speed sensors
  • ECU processing error

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the crankshaft and camshaft speed sensors and their wiring.

  2. 2

    Ensure the sensors are clean and properly seated.

  3. 3

    If the problem continues, the ECU may have an issue processing the signal.

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