just got sons 89 grand prix runnin after sitting for a couple years--. 2.8 v6 auto. runs great except for 43 code---knock sensor. replaced with new one--still there. replaced wire from sensor to a11 terminal on pcm---same code. disconnected neg batt terminal for hour---still there. WTF!!! CANT GET THRU JERSEY INSPECTION WITH A CODE LIT! any ideas or suggestions on getting rid of this code---before I drop good bucks on a new PCM---is greatly appreciated!! thanks!!
89 grand prix 2.8 liter code 43
- Thread starter busydad
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- 2.8 code 43 grand prix knock sensor
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this is what i found for 43
Possible causes:
1. Open or shorted knock sensor
2. Loose knock sensor
3. Excessive mechanical noise within engine
4. Improper or incorrectly installed MEM-CAL in the ECM or defective ECM
5. Intermittent open in the EST line to the ignition module
So to get through inspection
1. Have you tried a tankful of 93 octane gas?
2. No other noise sources?
3. Ignition control module
http://www.napaonline.com/Catalog/C...nition-Control-Module/_/R-ECHTP404_0362733259
Possible causes:
1. Open or shorted knock sensor
2. Loose knock sensor
3. Excessive mechanical noise within engine
4. Improper or incorrectly installed MEM-CAL in the ECM or defective ECM
5. Intermittent open in the EST line to the ignition module
So to get through inspection
1. Have you tried a tankful of 93 octane gas?
2. No other noise sources?
3. Ignition control module
http://www.napaonline.com/Catalog/C...nition-Control-Module/_/R-ECHTP404_0362733259