I downloaded these DTC codes today with Forscan. 

I wasn't aware of any issues and the car drives fine. Have these been hidden by the previous user? (noticed it said something about the light being turned off for the error)

Code: C003A - Right rear wheel speed sensor

Additional Fault Symptom:
 - Mechanical Failures

Status: 
 - Malfunction Indicator Lamp is Off for this DTC
 - Test not complete

Module: Antilock braking system

 Freeze Frame :
-GLOBTIM: 141260510 sec - Global real time
-TOTDIST: 57816.0 km - Total Distance
-MAINECUV: 11.75 Volt - Main ECU voltage supply
-OUTTMP: 23 °C - External Temperature From Sensor

Code: C0034 - Right Front Wheel Speed Sensor

Additional Fault Symptom:
 - Mechanical Failures

Status: 
 - Malfunction Indicator Lamp is Off for this DTC
 - Test not complete

Module: Antilock braking system

 Freeze Frame :
-GLOBTIM: 141260510 sec - Global real time
-TOTDIST: 57816.0 km - Total Distance
-MAINECUV: 11.75 Volt - Main ECU voltage supply
-OUTTMP: 23 °C - External Temperature From Sensor

Code: C0031 - Left Front Wheel Speed Sensor

Additional Fault Symptom:
 - Mechanical Failures

Status: 
 - Malfunction Indicator Lamp is Off for this DTC
 - Test not complete

Module: Antilock braking system

 Freeze Frame :
-GLOBTIM: 141260510 sec - Global real time
-TOTDIST: 57816.0 km - Total Distance
-MAINECUV: 11.75 Volt - Main ECU voltage supply
-OUTTMP: 23 °C - External Temperature From Sensor

Code: U3003 - Battery Voltage

Additional Fault Symptom:
 - Circuit Voltage Below Threshold

Status: 
 - Malfunction Indicator Lamp is Off for this DTC
 - Test not complete

Module: Antilock braking system

 Freeze Frame :
-GLOBTIM: 140420164 sec - Global real time
-TOTDIST: 57621.0 km - Total Distance
-MAINECUV: 9.50 Volt - Main ECU voltage supply
-OUTTMP: 23 °C - External Temperature From Sensor

Code: C0062 - Longitudinal Acceleration Sensor

Additional Fault Symptom:
 - Signal Plausibility Failure

Status: 
 - Malfunction Indicator Lamp is Off for this DTC
 - Test not complete

Module: Antilock braking system

 Freeze Frame :
-GLOBTIM: 152723893 sec - Global real time
-TOTDIST: 61711.0 km - Total Distance
-MAINECUV: 10.75 Volt - Main ECU voltage supply
-OUTTMP: 23 °C - External Temperature From Sensor

Code: P0480 - Fan 1 Control Circuit

Additional Fault Symptom:
 - Actuator Stuck

Status: 
 - Previously Set DTC - Not Present at Time of Request
 - Malfunction Indicator Lamp is Off for this DTC

Module: Powertrain Control Module

 Freeze Frame :
-LOAD: 20.39 % - Calculated Load Value
-ECT: 90 °C - Engine coolant temperature
-RPM: 2112 rev/min - Engine Revolutions Per Minute
-FUELSYS: OL - Drive  - Fuel System Status (Open/Closed Loop)
-SHRTFT1: 0.00 % - Short term fuel trim 1
-LONGFT1: -0.78 % - Long term fuel trim 1
-MAP: 50.0 kPa - Manifold absolute pressure sensor
-VSS: 83.0 km/h - Vehicle Speed
-SPARKADV: 17.00 ° - Spark Advance
-IAT: 1 °C - Intake Air Temperature
-MAF: 7.72 g/sec - Mass Air Flow
-TP: 23.53 % - Throttle Position
-RUNTM: 3109 sec - Time Since Engine Start
-FRP: 3220.0 kPa - Fuel Rail Pressure
-EVAP_PCT: 0.00 % - Commanded Evaporative Purge
-FLI: 34.51 % - Fuel Level
-BARO: 100.0 kPa - Barometric pressure
-VPWR: 7.63 Volt - Control Module Voltage
-LOAD_ABS: 37.25 % - Absolute Load Value
-EQRAT11_CMD: 20.351 :1 - Commanded Equivalence Ratio (Air to Fuel Mixture) Bank 1
-TP_REL: 10.98 % - Relative Throttle Position
-AAT: 0 °C - Ambient Air Temperature
-TP_B: 23.14 % - Throttle Position Sensor 2
-APP_D: 28.24 % - Accelerator Pedal Position D
-APP_E: 28.63 % - Accelerator Pedal Position E
-TAC_PCT: 16.47 % - Commanded Throttle Actuator Control
-FF_INF: 0.00 % - Inferred Flex Fuel Percentage
-LONGFT12: 0.00 % - Long Term Fuel Trim (Bank 1, Sensor 2)
-APP_REL: 12.55 % - Accelerator Pedal Position Relative

 

They are all historic DTC's i.e. not active at the point when you scanned for them.  If you clear them all, drive around as normal for a week and re-scan, any new DTC's (if any do actually pop up again) are "valid" and you aren't potentially worrying about stuff that has previously been resolved.

Just done the same with ABS speed sensor faults on my mk3.  Waiting to see if they re emerge!  Keep us posted.