Bosch · ECU Troubleshooting
This indicates a problem with the Analog-to-Digital (AD) converter circuit 1 within the ECU. This circuit is used to convert analog sensor signals into digital data.
Click steps to track your progress.
Check the sensor connected to the affected AD channel.
Ensure wiring to the sensor is free from interference or damage.
If the issue persists, the ECU's AD converter may be defective.