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Buick Trouble Code Decoder for Scanmaster ALDL or SES Light

Getting trouble codes from your SES light, ALDL connector or scanmaster?

Here’s a list of the code numbers & what they mean:

ERROR CODE     MALFUNCTION DESCRIPTION
    
12                   ERROR CODE DIAGNOSTIC SYSTEM FUNCTIONING CORRECTLY
    
13                   OXYGEN SENSOR CIRCUIT OPEN
    
14                   COOLANT TEMPERATURE SENSOR CIRCUIT (HIGH TEMP)
    
15                   COOLANT TEMPERATURE SENSOR CIRCUIT (LOW TEMP)
    
21                   THROTTLE POSITION SENSOR (TPS) CIRCUIT (HIGH)
    
22                   THROTTLE POSITION SENSOR (TPS) CIRCUIT (LOW)
    
23                   MANIFOLD AIR TEMP (MAT) CIRCUIT (LOW TEMP)
    
24                   VEHICLE SPEED SENSOR (VSS) CIRCUIT FAILED
    
25                   MANIFOLD AIR TEMP (MAT) CIRCUIT (HIGH TEMP)
    
31                   WASTEGATE SOLENOID ELECTRICAL SIGNAL FAILED
    
32                   EXHAUST GAS RECIRCULATION (EGR) CIRCUIT
    
33                   MASS AIR FLOW (MAF) CIRCUIT (HIGH)
    
34                   MASS AIR FLOW (MAF) CIRCUIT (LOW / NO SIGNAL)
    
35                   CODE NOT USED ON TURBO CARS
    
41                   CAM SENSOR CIRCUIT FAILURE
    
42                   C3I ELECTRONIC SPARK TIMING (EST) FAILURE
    
43                   ELECTRONIC SPARK CONTROL (ESC) FAILURE
    
44                   OXYGEN SENSOR CIRCUIT (LEAN EXHAUST)
    
45                   OXYGEN SENSOR CIRCUIT ( RICH EXHAUST)
    
51                   PROM ERROR
    
52                   CALPAK ERROR
    
53                   WATER INJECTION
    
54                   CODE NOT USED ON TURBO CARS
    
55                    ECM ERROR

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