P06D8

Symptoms

• Inflated sensor readings on the diagnostic scanner
• Error codes for sensors with the “Circuit High” type
• Incorrect operation of the engine control system
• Check Engine Light Is On
• Engine power limitation

Causes

• Shorting the reference voltage wire of circuit F to a higher voltage source
• Internal ECU stabilizer malfunction
• Poor grounding of the control unit
• Damage to wiring insulation
• Incorrect connection during previous repair

How to Fix

1. Measure the voltage at the ECU circuit terminal F - it should be about 5 V
2. Check to see if circuit wire F is not shorted with adjacent wires in the harness.
3. Check the ECU grounding (resistance should be less than 0.1 Ohm)
4. Inspect the ECU connectors for incorrect connections.
5. With the sensors disconnected, measure the voltage again - if it is high, the problem is in the ECU
6. Send the ECU for diagnostics or replacement if an internal fault is confirmed

Related codes

Error P06D8 by Vehicle Brand