recently my check engine light started to blink but only when I turn the key to accessory, engine not running.

can someone please tell me what this means?
The check engine light is not on but when I connect a scanner I get a
pending code of PO141.

 

Does it blink when running?

 

it used to blink when running but I replaced oxygen sensors all 4 and coil on plug ignition coils

 

I bought walker oxygen sensors and they are junk. misfired when I had them installed.

 

Use NTK or Denso O2 sensors. No Bosch!

 

generally if the light is blinking while it is running it is an active code. A p0141 is an O 2 sensor code.

 

po141 code keeps coming on even when I replaced that oxygen sensor twice.
I have checked the wiring and looks good.
what else could keep this same check engine light po141 keep coming on.

 

The only way I can clear the PO141 code is to disconnect the 4 plugs on the ecu engine computer. Then it goes away for 2 days or so. then comes back.

 

replaced affected oxygen sensor twice with no result

 

How can I be sure that it is not my ecu thats bad? engine computer.