2010 Porsche Panamera Turbo (970) V8-4.8L Turbo A L L Diagnostic Trouble Codes ( DTC ): P Code Charts Page 690
Fault effects
- CAN alive counter freeze
- Engine speed limitation
- Transmission limp-home indication in instrument cluster control unit
Software Monitoring B Of Signal Processing Unit
P1990
Diagnosis information - PDK
Software monitoring B of signal processing unit
Diagnostic conditions
The control unit initially tests internal function sequences when the ignition is switched on (terminal 15). If they are OK, all diagnosable outputs are
then tested and any faults are stored.
- Ignition on
Possible fault causes
- PDK control unit faulty
Fault setting conditions
- Complement error
Fault effects
- CAN alive counter freeze
- Engine speed limitation
- Transmission limp-home indication in instrument cluster control unit
Software Monitoring, Implausible Calculation Of Positive Engine Torque Intervention
P1990
Diagnosis information - PDK
Software monitoring, implausible calculation of positive engine torque intervention
Diagnostic conditions
The control unit initially tests internal function sequences when the ignition is switched on (terminal 15). If they are OK, all diagnosable outputs are
then tested and any faults are stored.
- Ignition on
Possible fault causes
- PDK control unit faulty
Fault setting conditions
- Fault in calculation path for positive engine intervention
Fault effects
- Transmission limp-home indication in instrument cluster control unit
- Message counter stopped
Software Monitoring, Reset Was Triggered By Application Software Monitoring A
P1990
Diagnosis information - PDK
Software monitoring, reset was triggered by application software monitoring A
Diagnostic conditions
The control unit initially tests internal function sequences when the ignition is switched on (terminal 15). If they are OK, all diagnosable outputs are
then tested and any faults are stored.
- Ignition on
Possible fault causes
- PDK control unit faulty
