Acura
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Cylinder No. 4 - misfire
Cause:
    Ignition system

Saab
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Cylinder 4 - misfire detected
Cause:
    Mechanical fault, ignition/fuel system, injector