The Check Engine Light may illuminate with controller area network (CAN) fault codes stored. Our technicians tell us that cleaning the electrical ground connections around the powertrain control module (PCM) to allow better electrical conductivity should help with this concern.
The Check Engine Light May Illuminate With Controller Area Network (CAN) Fault Codes Stored on Infiniti QX56
Average mileage: 123,678 (123,678–123,678)
4 people reported this problem
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Wife complained that the SUV went crazy, check engine light came on,turn signal lights flashing, ABS light illuminated, vehicle auto switch to 4wd, GPS in and out, etc. So I disconnected the battery connections, cleaned the corrosion with a brush, cleaned the battery post and the warning lights went off and the vehicle was back to normal.