Manufacturer Code Charts: 101508

101508 - P16BD

Information saved in
DME

Fault code
101508 - P16BD

Fault text
Throttle valve 2: Initial adaptation, lower limit position not
taught in

Fault description
The diagnostic function monitors the throttle valve
adaptation.

Condition for fault identification
Test condition:
The fault is recognized when, at the lower mechanical travel
stop position (throttle valve completely closed) the voltage
data for both throttle valve sensors are outside the valid
range (Sensor 1: 0.5 V +/- 0.3 V; Sensor 2: 4.5 V +/- 0.3 V)
Potential problem source(s):
- Operation of throttle valve 2 impaired by
dirt/contamination
- Defect in wiring harness between throttle-valve actuator
motor 2 and DME
- Throttle valve 2 defective
Terminal condition: Terminal 15
Voltage condition:
- Electrical system voltage > 10 V
Temperature condition:
- Intake air temperature > -10 °C
- Coolant temperature > -10 °C
- Coolant temperature < 142 °C
Time condition:
- 5 sec.
Other conditions:
- Engine off
- No other throttle valve diagnostic fault codes logged in
control module fault memory

Condition for fault memory entry
This fault is logged in the control module's fault memory
immediately.

Action in service
- Inspect throttle valve 2 for contamination
- Use tester to reposition throttle valve 2 to lower end of
travel range (0%) and determine whether it reaches the
travel stop
- Check wiring harness between DME and throttle valve
actuator motor 2
- Replace throttle valve 2

Fault effect and breakdown warning
Breakdown notice:
- The engine reverts to its limp-home program, continued
vehicle operation is possible but drivability is restricted,
because power is reduced the driver should refrain from
passing maneuvers.
Possible apparent symptoms:
- Power reduction
- Engine speed governed

Driver information
Warning light:
- ECE emissions warning lamp: on
- US emissions warning lamp: on
- ECE electronic engine power reduction: on
- US electronic engine power reduction: on
- CC message: on

Service instruction
- Throttle valve adaptation is triggered following
replacement of throttle valve or DME