Audi a3 1.6tdi fault code p261a - Cars & Trucks

Not all fault codes are genuine , you are best to hook car up to an OBD2 reader and clear codes first , if code re-appears investigate further , some codes are ghost codes or old codes stored

You need to clarify the fault code, as the 'f' is not valid.
Removing the 'f' gives 10 possible fault codes (0-9) ranging from manifold flap issues to the Evaporator circuit (relevant for diesels?) to the exhaust DPF needing a regeneration...

Try this link for code faults.
http://www.obd-codes.com/trouble_codes

run fault codes to check if a fault is recorded then use a code reader to reset the CPU.

HI,
Strongly suggest taking to the dealer as it should still be under warranty.

Code info I googled:

OBD II Fault Code P1F68 :Description of OBD II Fault code P1F68

TH2TNK Sensor Value Offset Shifting
Possible failuer of OBD II Fault code P1F68

• Hydrogen Tank Internal Temperature Sensor (TH2TNK) offset shifting
• Inlet Air Temperature Sensor (TA) offset shifting
• Offset shifting of both Teperature Sensor (TH2TNK) and Inlet Air Temperature Sensor (TA) in Hydrogen Tank
• RTC function error (Miscalculated Soak Time)
• FSVSCM failure
• FCCM failure

Diagnostic Procedure using AutoHex auto Scan tool tester

• The rear average wheel speed > 15km/h and vehicle speed on the meter<1km/h
• If the rear average wheel speed > 15km/h and VSP<1km/h lasts for 0.3 seconds, the malfunction is determined.

Test Conditions using AutoHex Scan tool tester

• Vehicle speed / wheel speed is normal
• Brake is out of action
• The automatic brake is out of action

Clear Fault codes Conditions

• The rear average wheel speed > 15km/h and vehicle speed on the meter<1km/h
• If the rear average wheel speed > 15km/h and VSP<1km/h lasts for 0.3 seconds, the malfunction is determined.

MIL Status

• Glow ON

Note:

• AutoHex is a professional OBD /OBD II diagnostic scanner / scan tool tester.
• This fault code is a GERENRIC fault code, some cars may change the meaning of this fault code.
  To get the accurate fault code description you may use AutoHex OBD scanner

The ESP light has come on due to a fault with the abs/ traction system . It will req fault code reading by a diagnostic tester to determine the fault more than likely a abs wheel speed sensor.

2001 Audi A6
EOBD code: P0420
Fault location: Catalytic converter system, bank 1 - efficiency below threshold
Probable cause: Catalytic converter, wiring, heated oxygen sensor 2 (downstream)

EOBD code: P0430
Fault location: Catalytic converter system, bank 2 - efficiency below threshold
Probable cause: Catalytic converter, wiring, heated oxygen sensor 2 (downstream)

463A definitely not VAG codes they are from one of the cheap code readers.
Audi A4 Quattro - fault code 463a: engine control unit disabled.
This could be a dirty sensor or bad connection somewhere.
The immobilizer light flashes when you insert the key?
Imobiliser pick up loop in the steering column sounds dodgy, take the cowling off & check its connected ok. Just clipped it back in.

Trouble code identification:
VAG type 5-digit fault code 18034 = EOBD type P1626 fault code:
Fault location = CAN data bus, TCM - no signal
Probable cause = TCM trouble code(s) stored, TCM incorrectly coded, wiring, matching resistor in ECM.

Code P1297(Connection turbocharger - throttle valve pressure hose) is related to air delivery to the engine. Unfortunately there is many components that could caused this code. For 1.8 engine the most common places to look for:
Check for damaged vacuum lines, next check over-bust valve(located in the intake hose) if holding vacuum, than I would check intake hose itself for damage or leaks. Some times broken throttle body can cause that fault (idle fluctuation). Lastly if car lack of power- damaged turbocharger can cause insufficient intake pressure.