1993 Buick Century NEED ADVICE ON HOW TO FIX Problem or wha

Tiny
FIGGY1981
  • MEMBER
  • 1993 BUICK CENTURY
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 15,800 MILES
I have a 1993 buick century 6 cylinder. I have recently did an engine check and the number code 43 pop up. I know what the code says but I dont know what it means. The code says electronic spark timing (EST) circuit-low voltage detected or electronic spark control (ESC) - circuit problems. Can you please tell me what this means. Thank you.
Tuesday, July 14th, 2009 AT 1:33 PM

1 Reply

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Hello, any driveability issues? Was the check engine lite on? Erase the code, see if it comes back? My info shows that to be a knock sensor code. If that sensor detects a knock, it may retard the timing until the knock goes away. Now, whether the problem is the sensor--wiring circuit-- or an internal engine knock, caused by whatever?
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Tuesday, July 14th, 2009 AT 2:08 PM

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