Lots of Fault codes. Any advice?

Hangry

Member
Lots of fault codes. Any advice or tips?

I own a 2004 BMW z4 3.0i. Lately lots of sensors have been failing and my Z4 is in and out of the shop. To the advice of my mechanic I bought a bmw scanner and these are all the codes that showed up today. I recently replaced the battery but am wondering if it’s a faulty one since it keeps dying in the cold and ever since the replacement, my convertible top has not been working and the dsc and abs light have been on. - I am planning on returning the battery and replacing it. My z4 has had a fuel:air ratio issue since I’ve owned it but my mechanic cannot find the issue -there is no intake leak anywhere (or he hasn’t been able to find one) and he has replaced a lot of the parts as well but issue still persists.
Here are the codes. Any advice on what any of them might mean would be greatly appreciated:

Fault Codes:
2883 Fuel trim bank 2
03 Pressure actuator 3 (P0700, P0798)
02 Pressure actuator 2 (P0700, P0788)
95 CAN wheel speeds

0F Power on reset
03 toleration of changing code increased with key # 0

5E19 CAN data fault from DME/DDE(DSC lamp on as long as error is present)
5E24 Pressure sensors
5E20 Pressure sensor 1

14020109

6129 Vehicle engine speed
6128 Vehicle speed
6127 Steering angle
611D power supply

93E7 undervoltage
93A8 Processor: reset
93E8 Control-unit fail
93A9 Control-unit fail

95B7 Seat occupancy detector, passenger, communications fault

2B020220
F5 No CAN identification (ASC)
F9 No CAN identification (ASC)

16 Wire/switch, dir, Indic., sh. circ. to earth
17 Wire/switch, main b.headl.fl., sh. c. to earth

63 Time exceeded, close convertible top
D3
24 Switch, convertible top stowed, undefined voltage range
62
21 Switch, cowl panel unlocked, undefined voltage range

2202016B
6D Emergency cal button, open circuit
6E Emergency SOS call LED, open circuit
80 Breakdown button, open circuit
 
Best post this in the E85 section..not the E89 post 2009 cars.. :tumbleweed: :thumbsup:
 
There are lot of codes relating to voltage and/or power issues, so checking the battery is the first port of call IMO.

As said, clear all faults and start again. Historical faults can muddy the waters. :)
 
Hangry said:
Reset the codes and only 3 remained, pressure sensor 1, fuel bank 2 lean and airbag under voltage

Pressure sensor 1 is one of the two mounted on the side of the brake master cylinder. The one closest to the front of the car. A quick check is to swap the plugs over, reset and see if the fault moves to number 2.
If so, you need a new sensor.

If fuel is only lean on bank 2, that is the rear three cylinders so most likewly nothing to do with the intake side. Unless you have a leak at the actual inlet manifold gasket.

Airbag under voltage? I assume you have an airbag light on the dash? Does your code reader tell you if it is the left, right or centre module?
 
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