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P0122

P0122 - Accelerator sensor 1 error (voltage low)

Bosch · ECU Troubleshooting

What does P0122 mean?

The voltage signal from the first accelerator position sensor is too low. This could be due to a faulty sensor or a problem with the wiring.

Common Causes

  • Faulty accelerator position sensor 1
  • Wiring short to ground or open circuit
  • Poor connection

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the accelerator position sensor 1 and its connections.

  2. 2

    Inspect the wiring for shorts to ground or open circuits.

  3. 3

    Measure the sensor output voltage.

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 sensorP0123P0123 - Accelerator sensor 1 error (voltage high)
Source: Bosch ECU Troubleshooting
Open Manual (Page 3)Search more codes in this manual