code 43

[stephen p luce]

So I changed the a/c comp, drier, condenser, orifice tube, flushed, recharged with 32 oz freon. works perfect 40 deg air, sweet. take the truck for a road test code 43 pops on wasn't there before so I checked what I did cleaned the ECM grounds by the t-stat they are the only wires connected to the ecm that I touched, no help, found a vac line off still no help. Anybody have any ideas. had a new knock sensor about a year ago and a new dist about the same time. HELP!!

 

[Supercharged111]

What brand knock sensor did you go with? If it's parts store garbage then that's the first thing I'd look at.

 

[Schurkey]

WHAT VEHICLE???

Connect a scan tool, look at knock sensor counts (and any other sensors/outputs that seems off.)

 

[alpinecrick]

WHAT VEHICLE???

1966 JD4020.

Geeeez Shurkey, do we have to tell you everything........?

 

[stephen p luce]

update on the code 43. replaced the ESC module and that fixed it. the truck was a 90 K1500 5.7 auto. I didn't replace the knock sensor after I got it up on the lift it looked like it had been replaced recently so I swapped modules with my 89 K1500 5.7 and the ck eng light went away.