P064E: Internal Control Module O2 Sensor Processor Performance Bank 2
The P064E code indicates that the Engine Control Module (ECM) has detected a performance issue with the internal processor responsible for monitoring the oxygen sensor on Bank 2. This is typically caused by a faulty ECM, a software glitch, or a wiring problem affecting the O2 sensor circuit. The code suggests the ECM's internal self-check has failed, which can lead to incorrect air-fuel mixture adjustments and reduced engine efficiency.
01. Most Common Causes
- Faulty Engine Control Module (ECM)
- ECM software corruption or need for update
- Damaged wiring or connectors to Bank 2 O2 sensor
- Short circuit or open circuit in O2 sensor circuit
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Poor fuel economy
- Rough idle or hesitation
- Failed emissions test
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional codes.
Step 2: Inspect wiring and connectors for Bank 2 O2 sensor for damage or corrosion.
Step 3: Check for technical service bulletins (TSBs) related to ECM software updates.
Step 4: If no wiring issues found, test the ECM or replace it after verifying power and ground.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as the ECM may not properly control the air-fuel mixture, potentially causing engine damage or poor performance.
How much does it cost to fix?▼
Diagnosis typically costs $50-$150. If the ECM needs replacement, it can range from $500 to $1,500 including labor.