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Home >> Chevrolet >> 1993 >> Beretta L4-138 2.3L DOHC QUAD 4 >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Sensors and Switches - Computers and Control Systems >> Knock Sensor >> Technical Service Bulletins >> Engine Controls - Revised OBD System Check, DTC 43 (KS) >> Update Description

Update Description


This bulletin updates Section 6E3 of the 1993 1993 "L" body with the 2.3L (VIN A) Engine. The updated pages reprosent engineering changes in the Knock Sensor (KS) System. Included with these pages are enhanced diagnostic charts. The pages are as follows:

1993 Chevrolet "L" body

- A-10 On-board Diagnostic (OBD) System Check, Tech 1 Data
- A-68 DTC 43 Knock Sensor (KS) Circuit Facing Page
- A-69 DTC 43 Knock Sensor (KS) Circuit Chart
- C5-2 Chart C-5 Knock Sensor (KS) System Check Facing Page
- C5-3 Chart C-5 Knock Sensor (KS) System Check

Please update your Service Manuals accordingly.

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