P06B8

Symptoms

• Check Engine Light Is On
• The computer resets the adaptation parameters after turning off the ignition
• Unstable engine operation (loss of mixture adaptation, idle speed)
• Possible loss of immobilizer settings
• Lots of random error codes

Causes

• Failure of the NVRAM chip (EEPROM/Flash) in the ECU
• Memory damage due to a power surge or short circuit in the on-board network
• Exposure to moisture on the ECU board
• Long service life and exceeding memory write cycle
• Incorrect ECU flashing

How to Fix

1. Read all error codes and evaluate their totality
2. Check the voltage of the on-board network - exclude surges or unstable power supply to the ECU
3. Try a full ECU memory reset (power off for 15+ minutes)
4. Perform a backup reading of the ECU data and try to reflash it
5. Send the ECU for diagnostics and memory repair to a specialized workshop
6. If repair is impossible, replace the ECU with flashing and coding

Related codes

Error P06B8 by Vehicle Brand