Audi
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Ignition coil/amplifier, cylinder 7 - short to positive
Cause:
    Wiring short to positive, ignition coil/ amplifier

GM
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    IC Module 3X Reference Circuit Conditions
Cause:
    Engine running, then the PCM detected that the ratio of 18X reference pulses to CMP sensor pulses it received equaled 36:1, or that the ratio of 18X REF pulses to 3X REF pulses it received did not equal 6:1, either condition present for over 10 seconds

Jaguar
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Ignition coil, cylinder 4 - early activation
Cause:
    Wiring, ignition coil, engine control relay, ECM