What it means
The NOx sensor processor for Bank 1 Sensor 1 is not performing as expected. This code does not by itself identify whether the sensor, its wiring, or a control module is at fault.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
How it works
Bank 1 Sensor 1 is the upstream NOx sensor assigned to bank 1, and its processor evaluates the sensor's NOx readings. P06EA sets when that processor's performance does not meet the expected criteria; the code alone does not establish whether the sensor, wiring, or module is responsible.
Common causes
Most likely first.
- NOx sensor or processor fault
- Wiring or connector fault
- Control-module fault
Symptoms
- Check-engine light on
- Possible NOx warning
How to diagnose it
- Record freeze-frame data and scan the engine and aftertreatment modules for related NOx sensor, heater, power, or communication faults.
- Use the vehicle's bank and sensor layout to confirm the location of Bank 1 Sensor 1, then inspect its connector and harness for heat damage, corrosion, loose pins, or exhaust contact.
- Check the Bank 1 Sensor 1 live data and processor status under the conditions shown in freeze-frame, comparing them with the manufacturer's diagnostic information.
- Test the sensor's power, ground, and communication circuits at its connector according to the wiring diagram and manufacturer's specification.
- If the circuits are sound, evaluate the Bank 1 Sensor 1 NOx sensor and processor using the manufacturer's test procedure before replacing it.
- Consider a control-module fault only after the sensor and its wiring pass the specified checks.
Common fixes
- Secure or repair damaged Bank 1 Sensor 1 wiring away from hot exhaust components.
- Clean or repair corroded, loose, or heat-damaged sensor connector terminals.
- Repair a verified power, ground, or communication-circuit fault for Bank 1 Sensor 1.
- Replace the Bank 1 Sensor 1 NOx sensor and processor if its specified tests confirm failure.
- Repair or replace a control module only if the manufacturer’s diagnostic procedure confirms it is faulty.
Can I keep driving?
If the vehicle drives normally, a short trip for diagnosis is generally reasonable, but the fault can prevent correct NOx monitoring and may affect emissions compliance. Heed any NOx warning or change in engine operation and avoid delaying repair.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.