Result:

p0418

Generic
Type:
    Powertrain - Auxiliary Emission Controls - ISO/SAE Controlled
Description:
    Secondary Air Injection System Control "A" Circuit

GM
Type:
    Powertrain - Auxiliary Emission Controls - ISO/SAE Controlled
Description:
    Secondary Air Pump Relay Control Conditions
Cause:
    Engine speed over 40 rpm, system voltage from 8-15v, conditions met for 300 ms, then the PCM detected a short to ground, an open circuit or a short to power on the AIR Solenoid Relay control circuit

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