S-10 Forum banner

Code 43 - Electronic Spark Control (ESC)

3.3K views 4 replies 5 participants last post by  SY2932  
#1 ·
Code 43

When I drive on the highway, usually during accelerating up to 100 km/h. The "Service Engine Soon":eek: light comes on. I checked the codes and it gave me a code 43.


From my Hayes Manual:

Code 43

Electronic Spark Control

The ESC retard signal has been on for too long or the system has (ESC) unit failed a function check.

The "Knock" or Detoation sensor is brand new so I'm assuming it not that. I went to the scrap yard and pulled one ot and tried that but I still get that code. Any ideas?



Also when I hold my gas pedal steady somewhere around 1500 - 2000 rpm the engine kinda surges.:wtf:

Thank you.
 
#2 ·
Did you clear the code after you put the junker one on? Stuff like that I wouldn't really trust a junk yard part anyways.
 
#3 ·
Disconect your battery for about 20 seconds to clear the code. It will keep coming on because its stored in memory. Then if it comes back on there is a maybe 3x3 in (75x75mm) flat, black box that is the ESC. The signal from the knock sensor goes to it.