P06A6

Symptoms

• Check Engine Light Is On
• Periodically unstable engine operation
• Floating idle speed
• Inconsistent sensor readings
• Periodic failures during acceleration

Causes

• Poor contact or oxidation of the connector of one of the sensors of group A
• Incipient breakdown of 5V line wire insulation
• Sensor with unstable internal resistance
• Microcrack in the track of the ECU printed circuit board
• Moisture in the connector or wiring harness

How to Fix

1. Read the error codes, pay attention to the intermittent codes of sensors of group A
2. Inspect all group A sensor connectors for oxidation, corrosion, poor contact
3. Perform a wiggle test on the wiring with the engine running - monitor the response on an oscilloscope
4. Measure the reference voltage in the dynamics with an oscilloscope
5. Eliminate bad contacts, replace damaged wiring sections
6. Reset codes and do a long test drive

Related codes

Error P06A6 by Vehicle Brand