E39 525i gearbox slipping into 5th

[Nakz]

Hi everyone I've been having issues with my bmw 525i petrol auto gearbox, where while driving the car would start slipping into 5th gear or staying stuck in 5th with the gearbox fault light on and you can hear a clicking sound coming from the gearbox or the airbag fault coming on so i would have to pull over seitch the car off and hope the fault would go after a little while resting. when i got it checked these were the fault codes that came up, 79 02 sensor 1 heater after CAT, 190 02 sensor 1 after CAT heating, 217 CAN electronic transmission control (EGS) Signal, 152 02 sensor before CAT No signal, 83 Electronic Transmission Control (EGS) ECU internal fault, 11 Supply voltage, F0 Internal ECU error. Any help or advice would be greatly appreciated

[Chedley]

The ECU / EGS errors are probably related to low voltage : Test the alternator and check/re-charge the battery
The other errors : Replace the rear post-cat O2 sensors. Use oem (BMW or Bosh) sensors..