KNOWN FAULTS · Audi
Audi A1 (8X) S1 (2.0 TFSI) common problems.
2010–2018 · Petrol
Sources are not verified in real time and no entry confirms that your car is affected.
2 known faults with sources
Applies if: Only if fitted with the air conditioning system described.
A/C not cooling: N280 valveClimate control
- Engine / equipment
- Air conditioning with clutchless compressor and N280 regulating valve (combustion VW, Audi, Seat, Cupra and Skoda from 2006)
- Period mentioned
- 2006–2026
- Symptoms
- The air does not cool or cools intermittently (for example only at motorway speed), and sometimes the compressor rattles with the A/C on. Codes 01232 (N280 valve), P2612 or 00898.
- Possible cause described
- The compressor regulates its output with the N280 solenoid valve, its most common failure point. Audi issued technical bulletins over a manufacturing fault in this valve on Sanden compressors. Its connector can also become brittle and corrode (especially without the engine undertray), or the wiring fails.
- Check for the garage
- Read the codes and N280 control current with VCDS or ODIS, measure its resistance (about 10 ohms) and check the connector and wiring before replacing parts. If the valve or compressor is replaced, the whole circuit must be flushed.
- Cost cited in the source
- N280 valve: a cheap part (about 30 dollars) where sold separately; new compressor with circuit flush: considerably moreA rough figure from the original database, not an up-to-date quote.
Sources from the original database
Audi (NHTSA): N280 valve bulletin for Sanden compressors (2021)Audi (NHTSA): N280 valve bulletin (2014)Ross-Tech Wiki: N280 valve code P2612Go-Parts: VW and Audi A/C compressor guideAudiZine: code 01232 from an N280 wiring fault
View full entryApplies if: Only Audi S1 2.0 TFSI MY2014–2018 with Haldex Gen 5 and controller 0AY907554F physically confirmed; symptoms and testing confirm an ECU fault, after ruling out the pump, power supply and network.
Haldex 5 without communication or all-wheel driveDrivetrain / electronics
- Engine / equipment
- S1: Haldex 5 controller, reference 0AY907554F
- Period mentioned
- Only production periods and VINs documented in the application conditions.
- Symptoms
- Traction warning, absent AWD function and no communication.
- Possible cause described
- Controller failure confirmed through testing; no single internal mechanism published.
- Check for the garage
- Confirm reference; check pump, power and network before testing and repairing controller.
- Cost cited in the source
- No verified quote; confirm part and diagnosis.A rough figure from the original database, not an up-to-date quote.