AMC OBD Trouble Code 27

Quad-driver module (computer) 2nd gear circuit

Sub-oxygen sensor circuit fault (for ES300 CA GS300 models)

Injector output driver does not respond properly to the control signal or injector

Injector # control circuit
Injector number # output driver circuit does not respond to the control signal. Check the affected circuit.

QDM A ( Quad-driver module ) - 2nd gear circuit