Audi
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Ignition coil/amplifier, cylinder 4 - open circuit
Cause:
    Wiring open circuit, ignition coil/ amplifier

Jaguar
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Ignition coil, cylinder 4 - no activation
Cause:
    Wiring, ignition coil, engine control relay, ECM

Mazda
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Ignition coil - primary circuit malfunction
Cause:
    Wiring, ignition coil

Volkswagen
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Ignition coil/amplifier, cylinder 4 - open circuit
Cause:
    Wiring open circuit, ignition coil/amplifier