I agree with Soppy. I had similar issues, took it to several mechanics, and spent thousands. Arch Hoagland on this forum suggested I get an Ultra gauge, which I did and was able to isolate the problem to the bank 2 primary coil wiring harness, which was cracked and shorting out on the engine! Since you have isolated the code and replaced the knock sensor, check the wires leading to it as unplanned suggested.
__________________
2006 HR Admiral 37 PBD; Banks Torque Tubes; 1989 suzuki sidekick towed
|