GM Storm/Spectrum 1985-1993 Repair Guide

Storm

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Code 12 - Diagnostic system check
 
Code 13 - Oxygen sensor circuit (open)
 
Code 14 - Engine coolant temperature sensor circuit (high/low temperature indicated)
 
Code 21 - Throttle positions sensor circuit (high/low signal voltage)
 
Code 23 - Intake air temperature sensor circuit (high/low temperature indicated)
 
Code 24 - Vehicle speed sensor circuit
 
Code 32 - Exhaust gas recirculation system error (California only)
 
Code 33 - Manifold absolute pressure sensor circuit (signal voltage high/low or vacuum high/low)
 
Code 42 - Ignition control circuit error
 
Code 44 - Oxygen sensor circuit (lean exhaust indicated)
 
Code 45 - Oxygen sensor circuit (rich exhaust indicated)
 
Code 51 - ECM or EEPROM failure
 

 
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