GM Storm/Spectrum 1985-1993 Repair Guide

Spectrum

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CARBURETED VEHICLES





Code 12 - Diagnostic system check/No distributor reference pulse
 
Code 13 - Oxygen sensor circuit (open)
 
Code 14 - Coolant temperature sensor circuit (high temperature indicated)
 
Code 15 - Coolant temperature sensor circuit (low temperature indicated)
 
Code 21 - Throttle position sensor and idle switch circuit
 
Code 22 - Fuel cut-off relay circuit (open or grounded)
 
Code 23 - Mixture control solenoid circuit (open or grounded)
 
Code 25 - AIR system VSV solenoid circuit (open or grounded)
 
Code 42 - Fuel cut-off relay circuit (voltage high)
 
Code 44 - Oxygen sensor circuit (lean exhaust indicated)
 
Code 45 - Oxygen sensor circuit (rich exhaust indicated)
 
Code 51 - PROM error (faulty or incorrect PROM)
 
Code 53 - AIR system VSV solenoid circuit (voltage high)
 
Code 54 - Mixture control solenoid circuit (signal voltage high)
 
Code 55 - ECM error
 

 
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