Hi,

I have the same codes on my 2001 Discovery II with 85K miles. I changed spark plugs with Bosch Platinum +4s and now waiting for wires and O2 sensors to arrive. Strange thing is that after changing spark plugs, the car started to drive and idle worse than before and its giving me flashing check engine light more often. I stopped driving until new parts will arrive and will replace them.

Is it possible that Knock Sensor problem be caused by bad spark plugs and/or wires? I wont be changing knock sensor for a while and will do only wires and front O2 sensors.

 

Those spark plugs that you used are pure crap, they require tons of spark to work properly and with old worn out plug wires you are only asking for trouble, which you found out.
Go buy the cheap copper spark plugs and throw those in your truck.
Personally I would return the +4's.
Your truck came with cheap copper spark plugs and that is what it runs best on.
Do not do anything else until your plug wires and plugs are replaced.
Then clear the codes and see what comes back.

 

Hello guys,

As i wrote above i had same error codes and changed plugs (Bosch Platinum +4), plug wires (Kinsborne 8mm) and O2 Sensors (Bosch Premium Oxygen Sensors) but its still throwing all of the same codes. Do you have any idea what can be wrong? Can misfires be because of knock sensor problem? Car comparatively drives better than before replacement, but still with SES light on, it starts flashing for several seconds during driving.

 

Quit working 2 threads with the same issue. Go read your other thread and better do the knock sensor before more issues/$ come up.