i had the diagnostics done at nissan (photo of the print out attached) - the glow plugs were faulty and have been replaced.
and then i also bought a cheap diagnostics tool online... which is showing me the below..
DTC report
Selected brand: Nissan
============1==============
P0102
Raw code: 0102
ECU: Engine control unit
Status: Confirmed
OBDII: Mass air flow (MAF) sensor/volume air flow (VAF) sensor - low input
Nissan: Mass or Volume Air Flow Circuit low Input
============2==============
P0471
Raw code: 0471
ECU: Engine control unit
Status: Confirmed
OBDII: Exhaust gas pressure sensor - range/performance problem
Nissan: Exhaust Pressure Sensor Range/Performance
============3==============
P0471(95)
Raw code: 047195
ECU: Engine control unit[Archive (inactive)]
Status: Confirmed, Test failed since last DTC clear, Test not completed during this operation cycle
OBDII: Exhaust gas pressure sensor - range/performance problem
Nissan: Exhaust Pressure Sensor Range/Performance
============4==============
P0471(29)
Raw code: 047129
ECU: Engine control unit[Archive (inactive)]
Status: Confirmed, Test failed since last DTC clear
OBDII: Exhaust gas pressure sensor - range/performance problem
Nissan: Exhaust Pressure Sensor Range/Performance
============5==============
P0100(16)
Raw code: 010016
ECU: Engine control unit
Status: Test failed, Pending, Confirmed, Test failed since last DTC clear, Warning indicator requested
OBDII: Mass air flow (MAF) sensor/volume air flow (VAF) sensor - circuit malfunction
Nissan: Mass or Volume Air flow Circuit Malfunction
============6==============
P1525(F3)
Raw code: 1525F3
ECU: Engine control unit
Status: Test failed, Test failed (current drive cycle), Confirmed, Test failed since last DTC clear
OBDII: Air Bypass Valve System
Nissan: Air Bypass Valve System
============7==============
P0471(95)
Raw code: 047195
ECU: Engine control unit[Archive (inactive)]
Status: Confirmed, Test failed since last DTC clear, Test not completed during this operation cycle
OBDII: Exhaust gas pressure sensor - range/performance problem
Nissan: Exhaust Pressure Sensor Range/Performance
============8==============
P0471(29)
Raw code: 047129
ECU: Engine control unit[Archive (inactive)]
Status: Confirmed, Test failed since last DTC clear
OBDII: Exhaust gas pressure sensor - range/performance problem
Nissan: Exhaust Pressure Sensor Range/Performance
============9==============
P0100(16)
Raw code: 010016
ECU: Engine control unit
Status: Test failed, Pending, Confirmed, Test failed since last DTC clear, Warning indicator requested
OBDII: Mass air flow (MAF) sensor/volume air flow (VAF) sensor - circuit malfunction
Nissan: Mass or Volume Air flow Circuit Malfunction
============10==============
P1525(F3)
Raw code: 1525F3
ECU: Engine control unit
Status: Test failed, Test failed (current drive cycle), Confirmed, Test failed since last DTC clear
OBDII: Air Bypass Valve System
Nissan: Air Bypass Valve System