2010 BMW 128i Convertible (E88) L6-3.0L (N52K) P Code Charts
none
P1020
2A30 – P1020
Information saved in
DME
Fault code
2A30 – P1020
Fault text
Valvetronic, eccentric shaft sensor: power supply
Fault description
VVT-Supply Voltage Sensors Low Input (Bank 1)
Condition for fault identification
Test condition:
Monitoring of voltage supply to excentric shaft
Nominal value for voltage supply sensor = 5.0V
Terminal condition: Terminal 15 ON
Voltage condition:
Electrical system voltage terminal 87 >10.0 V
Condition for fault memory entry
Sensor power-supply voltage < 4.75V
Action in service
1. Check sensor power supply voltage with multimeter.
Supply voltage must lie between 4.75V and 5.25V.
2. If result is outside specified range: Check power-supply
wire to VVT sensor and check plug.
3. If contact is stretched or corroded: Replace plug on VVT
sensor
4. If wiring harness is defective: Replace wiring harness
between DME and VVT sensor.
Fault effect and breakdown warning
196
Driver information
Warning light:
ECE: No warning message. Engine reverts to VVT
emergency backup mode (throttled operation) US: OPEN
