P06A8

Symptoms

• Check Engine Light Is On
• Unstable engine operation when the load changes
• Periodic deviations in sensor readings
• Intermittent dips when accelerating
• Sometimes - errors in related systems (automatic transmission, ABS)

Causes

• Poor contact in the sensor connector belonging to group C
• Incipient breakdown of reference voltage wire insulation
• Unstable sensor with variable internal resistance
• Moisture getting into the harness or connector
• Instability of the reference voltage regulator in the ECU

How to Fix

1. Read all error codes and identify group C sensors using the diagram
2. Inspect the Group C sensor connectors for oxidation and poor contacts.
3. With the engine running, perform a wiggle test on the Group C harness while observing the scanner data.
4. Measure the reference voltage with an oscilloscope under load
5. Replace the sensor or restore the wiring if a faulty element is identified
6. Reset codes, test drive in various modes

Related codes

Error P06A8 by Vehicle Brand