P1644
2CFB – P1644
Information saved in
DME
Fault code
2CFB – P1644
Fault text
Throttle-valve adaptation value
Fault description
Throttle Valve Adaptation Stop Relearning Lower
Mechanical Stop (Bank 1)
Condition for fault identification
Test condition:
Terminal change and request for adaptation
Terminal condition: Terminal 15 ON
251
Voltage condition:
Voltage in onboard electrical system >= 10 V
Condition for fault memory entry
none
Action in service
1) Check: Sum of throttle valve voltages must equal 5 V,
2) Perform electrical check on wires to throttle valve
sensors,
visual inspection of plug-in terminals (at components,
wiring harness and DME),
3) Check to determine whether objects that could physically
prevent the throttle valve from closing are present in the
intake manifold or throttle valve,
4) Replace component
Fault effect and breakdown warning
Driver information
Warning light:
CC status report: Reduced engine performance!,
MIL ON
EMB + rpm limit 1300 rpm
