Unfortunately, code "1040" is a generic fault code and may need further diagnostic testing to decipher. In some cases, special diagnostic equipment may be required. If the code begins with a letter "P", for example, this indicates a powertrain problem.
Had this been code "P1041", for example, this would mean that injector circuit #1 is malfunctioning. P1042 is injector circuit #2, and so forth.
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ODB2 FAULT CODE P1420 CHEVROLET/PONTIAC - Intake Air Low Pressure Switch Circuit Low Voltage
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