P064D
PPowertrainECU Internal O2 Sensor Processor Performance (Bank 1)
What does this code mean?
Severity : MediumP064D means the engine control module has detected a performance problem with its internal oxygen sensor processing circuit for bank 1. This circuit interprets the sensor signal, often from a wideband sensor. The fault can lie in the ECU itself, but also in the sensor or its wiring.
Symptoms
- Check engine light on.
- Increased fuel consumption.
- Uneven idle or acceleration.
- Possible emissions test failure.
Possible causes
- Faulty bank 1 upstream oxygen sensor.
- Damaged or shorted sensor wiring or connector.
- Poor power supply or ground to the ECU.
- Internal engine control module fault.
- ECU software update required, depending on the manufacturer.
Diagnosis and repair
- Check for other codes, especially oxygen sensor codes.
- Inspect the bank 1 sensor wiring and connector.
- Verify the ECU power and ground circuits.
- Test or replace the sensor if its signal is implausible.
- If the fault persists, have the ECU diagnosed, updated or replaced.
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Code
P064D
Category
Powertrain
Prefix
P
Standard
OBD-II / SAE J2012