Ford
Type:
    Powertrain - Transmission - ISO/SAE Controlled
Description:
    Incorrect Ratio for First Gear Conditions
Cause:
    Engine running in 1st gear with VSS signals received, then the PCM detected that the transmission First Gear Ratio was incorrect

Generic
Type:
    Powertrain - Transmission - ISO/SAE Controlled
Description:
    Gear 1 Incorrect Ratio

GM
Type:
    Powertrain - Transmission - ISO/SAE Controlled
Description:
    Transaxle - No First Gear Conditions
Cause:
    Vehicle speed over 3 mph, Turbine Shaft Speed over 224 rpm, no turbine shaft or vehicle speed signal noise, high line pressure commanded, then the PCM detected twice per vehicle trip, that the ratio failure counter equaled 255 for an in-gear fault, or the shift Counter was over 100 on a downshift to 1st gear in acceleration

Nissan
Type:
    Powertrain - Transmission - ISO/SAE Controlled
Description:
    AT - first gear selection - malfunction
Cause:
    Valve block